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EX4600 Switch Hardware Guide

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EX4600 Switch Hardware Guide - Juniper

EX4600 Switch Hardware Guide - Juniper Networks

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EX4600 Switch Hardware Guide
Published
2021-06-23

ii
Juniper Networks, Inc. 1133 Innovation Way Sunnyvale, California 94089 USA 408-745-2000 www.juniper.net
Juniper Networks, the Juniper Networks logo, Juniper, and Junos are registered trademarks of Juniper Networks, Inc. in the United States and other countries. All other trademarks, service marks, registered marks, or registered service marks are the property of their respective owners.
Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify, transfer, or otherwise revise this publication without notice.
EX4600 Switch Hardware Guide Copyright � 2021 Juniper Networks, Inc. All rights reserved.
The information in this document is current as of the date on the title page.
YEAR 2000 NOTICE
Juniper Networks hardware and software products are Year 2000 compliant. Junos OS has no known time-related limitations through the year 2038. However, the NTP application is known to have some difficulty in the year 2036.
END USER LICENSE AGREEMENT
The Juniper Networks product that is the subject of this technical documentation consists of (or is intended for use with) Juniper Networks software. Use of such software is subject to the terms and conditions of the End User License Agreement ("EULA") posted at https://support.juniper.net/support/eula/. By downloading, installing or using such software, you agree to the terms and conditions of that EULA.

iii
Table of Contents

About This Guide | ix

Overview

EX4600 System Overview | 2

EX4600 Switch Hardware Overview | 2

EX4600 Switch Models | 5

Understanding Redundancy of EX4600 Switch Components and Functionality | 7

EX4600 Chassis | 7 Chassis Physical Specifications for an EX4600 Switch | 7

Field-Replaceable Units in an EX4600 Switch | 8

Port Panel of an EX4600 Switch | 9

Access Port and Uplink Port LEDs on an EX4600 Switch | 10

Management Panel of an EX4600 Switch | 14

Chassis Status LEDs on an EX4600 Switch | 17

Expansion Modules for the EX4600 | 19 EX4600-EM-8F | 20 QFX-EM-4Q | 21

EX4600 Cooling System | 22 Cooling System and Airflow in an EX4600 Switch | 22

Fan Module LED on an EX4600 Switch | 29

EX4600 Power System | 30 AC Power Supply in an EX4600 Switch | 30

AC Power Supply LEDs on an EX4600 Switch | 33

AC Power Specifications for an EX4600 Switch | 34

AC Power Cord Specifications for an EX4600 Switch | 35

DC Power Supply in an EX4600 Switch | 36

DC Power Supply LEDs in EX4600 Switches | 39

DC Power Specifications for an EX4600 Switch | 40

Grounding Cable and Lug Specifications for an EX4600 Switch | 41

Site Planning, Preparation, and Specifications

Site Preparation Checklist for an EX4600 Switch | 44

EX4600 Site Guidelines and Requirements | 46 Environmental Requirements and Specifications for EX Series Switches | 46

General Site Guidelines | 54

Site Electrical Wiring Guidelines | 55

Rack Requirements for an EX4600 Switch | 56

Cabinet Requirements for an EX4600 Switch | 58

Clearance Requirements for Airflow and Hardware Maintenance for an EX4600 Switch | 60

EX4600 Network Cable and Transceiver Planning | 61 Determining Interface Support for an EX4600 Switch | 61

Cable Specifications for QSFP+ Transceivers on EX4600 Series Switches | 62

Network Cable Specifications for EX4600 Switches | 64

Understanding EX Series Switches Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion | 65

Calculating the Fiber-Optic Cable Power Budget for EX Series Devices | 67

Calculating the Fiber-Optic Cable Power Margin for EX Series Devices | 68

EX4600 Management Cable Specifications and Pinouts | 70 Cable Specifications for Console and Management Connections for the EX4600 | 70

USB Port Specifications for an EX Series Switch | 71

Console Port Connector Pinout Information | 72

RJ-45 Management Port Connector Pinout Information | 73

Initial Installation and Configuration

Unpacking and Mounting an EX4600 Switch | 75 Installing and Connecting an EX4600 Switch | 75

Unpacking an EX4600 Switch | 76

Mounting an EX4600 Switch in a Rack or Cabinet | 77 Before You Begin Rack Installation | 77 Four Post Procedure | 79

Connecting the EX4600 to Power | 81 Connecting Earth Ground to an EX4600 Switch | 81

Connecting AC Power to an EX4600 Switch | 83

Connecting DC Power to an EX4600 Switch | 85

Connecting the EX4600 to Management Devices | 90 Connect a Device to a Network for Out-of-Band Management | 90

Connect a Device to a Management Console Using an RJ-45 Connector | 91

Connecting EX4600 Switches in a Virtual Chassis | 92

Configuring Junos OS on the EX4600 | 93

Maintaining Components

Maintaining the EX4600 Switch Cooling System | 98

Removing a Fan Module from an EX4600 Switch | 98

Installing a Fan Module in an EX4600 Switch | 99

Maintaining the EX4600 Switch Power System | 101 Removing a Power Supply from an EX4600 Switch | 101

Installing a Power Supply in an EX4600 Switch | 103

Maintaining the Expansion Module in an EX4600 Switch | 105 Removing an Expansion Module from an EX4600 Switch | 105

Installing an Expansion Module in an EX4600 Switch | 106

Maintain Transceivers | 109 Remove a Transceiver | 109

Remove a QSFP28 Transceiver | 111

Install a Transceiver | 113

Install a QSFP28 Transceiver | 116

Maintain Fiber-Optic Cables | 118 Connect a Fiber-Optic Cable | 118

Disconnect a Fiber-Optic Cable | 119

How to Handle Fiber-Optic Cables | 120

Removing the EX4600 Switch | 121 Installing and Removing EX4600 Switch Hardware Components | 121

Powering Off an EX4600 Switch | 122

Removing an EX4600 Switch from a Rack or Cabinet | 125

Troubleshooting Hardware

Troubleshooting the EX4600 Components | 127

Understand Alarm Types and Severity Levels on EX Series Switches | 127

Interface Alarm Messages | 129

Creating an Emergency Boot Device | 129

Performing a Recovery Installation | 131

Contacting Customer Support and Returning the Chassis or Components

Returning an EX4600 Chassis or Components | 134

Returning an EX4600 Switch or Component for Repair or Replacement | 134

Locating the Serial Number on an EX4600 Switch or Component | 135 Listing the Chassis and Component Details Using the CLI | 135 Locating the Chassis Serial Number ID Label on an EX4600 Switch | 137 Locating the Serial Number ID Labels on FRU Components | 137

Contact Customer Support to Obtain Return Material Authorization | 138

Packing an EX4600 Switch or Component for Shipping | 139 Packing an EX4600 Switch for Shipping | 139 Packing EX4600 Switch Components for Shipping | 140

vii

Safety and Compliance Information

General Safety Guidelines and Warnings | 143

Definitions of Safety Warning Levels | 144

Qualified Personnel Warning | 146

Warning Statement for Norway and Sweden | 146

Fire Safety Requirements | 147

Installation Instructions Warning | 148

Chassis and Component Lifting Guidelines | 149

Restricted Access Warning | 149

Ramp Warning | 151

Rack-Mounting and Cabinet-Mounting Warnings | 151

Grounded Equipment Warning | 155

Laser and LED Safety Guidelines and Warnings | 156

Radiation from Open Port Apertures Warning | 159

Maintenance and Operational Safety Guidelines and Warnings | 160

General Electrical Safety Guidelines and Warnings | 166

Action to Take After an Electrical Accident | 167

Prevention of Electrostatic Discharge Damage | 168

AC Power Electrical Safety Guidelines | 169

AC Power Disconnection Warning | 170

DC Power Electrical Safety Guidelines | 171

DC Power Disconnection Warning | 172

DC Power Grounding Requirements and Warning | 174

DC Power Wiring Sequence Warning | 174

DC Power Wiring Terminations Warning | 176

viii
Multiple Power Supplies Disconnection Warning | 177 TN Power Warning | 178 Agency Approvals for EX Series Switches | 179 Compliance Statements for EMC Requirements for EX Series Switches | 180 Compliance Statements for Acoustic Noise for EX Series Switches | 185 Statements of Volatility for Juniper Network Devices | 185

ix
About This Guide
Use this guide to install hardware and perform initial software configuration, routine maintenance, and troubleshooting for the EX4600 switch. After completing the installation and basic configuration procedures covered in this guide, refer to the Junos OS documentation for information about further software configuration.
RELATED DOCUMENTATION EX4600 Quick Start

1 CHAPTER
Overview
EX4600 System Overview | 2 EX4600 Chassis | 7 EX4600 Cooling System | 22 EX4600 Power System | 30

2
EX4600 System Overview
IN THIS SECTION EX4600 Switch Hardware Overview | 2 EX4600 Switch Models | 5 Understanding Redundancy of EX4600 Switch Components and Functionality | 7
EX4600 Switch Hardware Overview
IN THIS SECTION Benefits of the EX4600 Switch | 3 EX4600 Hardware | 3 System Software | 5
The Juniper Networks EX4600 Ethernet switch is a highly versatile, second generation solution for campus environments. The EX4600 can be deployed in these environments: � Campus distribution � Small campus core � Top-of-rack in small, low -density data centers � Data center distribution in small, low -density data centers In addition to operating as a standalone switch, the EX4600 switch can act as a member switch in a nonmixed Virtual Chassis, a Virtual Chassis composed entirely of EX4600 switches, as well as participate as member switches in a mixed Virtual Chassis with EX4300 switches. The switch offers a flexible configuration of high-performance 10-gigabit and 40-gigabit ports to add higher port densities, additional scalability, and improved latency to the EX Series of switches.

3
Benefits of the EX4600 Switch
Compact solution--The EX4600 switch supports up to 72 10-Gigabit Ethernet ports in a 1 rack unit (1 U) chassis. Intelligent buffer management--EX4600 switches have a total of 12 MB shared buffers. While 25 percent of the total buffer space is dedicated, the rest is shared among all ports and is user configurable. The intelligent buffer mechanism in the EX4600 effectively absorbs traffic bursts while providing deterministic performance, significantly increasing performance over static allocation. Energy efficiency--The 10-Gigabit Ethernet ports consume less than five watts, thereby offering a low power solution for top-of-rack, end-of-row, and distribution deployments.
EX4600 Hardware
The EX4600 switch is a compact 1 U model that provides wire-speed packet performance, very low latency, and a rich set of Layer 2 and Layer 3 features. In addition to a high-throughput Packet Forwarding Engine, the performance of the control plane running on the EX4600 model is enhanced by the 1.5 -GHz dual-core Intel CPU with 8 GB of memory and 32 GB of solid-state drive (SSD) storage. The port panel of the EX4600 features 24 fixed small form-factor pluggable (SFP) or SFP+ access ports and 4 fixed quad SFP+ (QSFP+) high-speed uplinks.
Figure 1: EX4600 Port Panel with Expansion Bays
In addition, the switch has two module bays where you can install optional expansion modules. The EX4600 switch supports two expansion modules to increase port density:

4 � QFX-EM-4Q�Adds four additional QSFP+ ports to the chassis. When fully populated with QFX-
EM-4Q expansion modules, the EX4600 is equivalent to one with 72 interfaces (24 + 16 + 16 + 16). See Figure 2 on page 4. Figure 2: QFX-EM-4Q Expansion Module
� EX4600-EM-8F�Adds a total of eight additional SFP+ ports to the chassis. When fully populated with EX4600-EM-8F expansion modules, the EX4600 is equivalent to one with 56 interfaces (24 + 16 + 8 + 8). See Figure 3 on page 4. Figure 3: EX4600-EM-8F Expansion Module
The EX4600 switch can be used as: � A standalone switch. � A primary, backup, or linecard member in a Virtual Chassis with EX4600 switches or EX4300
switches. When in a mixed Virtual Chassis consisting of EX4600 switches and EX4300 switches, the EX4600 switches can be the primary, backup, or in the linecard role, while the EX4300 switches must be in the linecard role. An EX4600 Virtual Chassis enables you to interconnect up to 10 switches into one logical device and manage the device as a single chassis. An EX4600 Virtual Chassis is cabled in a ring topology.

5
In a mixed Virtual Chassis of EX4600 and EX4300 switches, the Junos OS release dictates whether the EX4600 is best used in the primary role. For Junos OS releases between 13.2X50-D10 and 14.1X53-D25, use the use the EX4300 as a primary and backup RE in the Virtual Chassis. For Junos OS Release 14.1X53-D25 and later, the EX4600 is fully supported as the primary in a mixed Virtual Chassis of EX4600 and EX4300.
System Software
EX Series switches run the Junos operating system (OS), which provides Layer 2 and Layer 3 switching, routing, and security services. An EX4600 switch ships with Junos OS installed on it. The same Junos OS code base that runs on EX4600 switches also runs on all Juniper Networks QFX Series devices, M Series, MX Series, and T Series routers.
You manage the switch by using the Junos OS CL), which is accessible through the console and out-ofband management ports on the switch.
All models of the EX4600 run on Junos OS Release 13.2X51-D25 or later.

EX4600 Switch Models

The EX4600 switches have a base configuration of 24 small form-factor pluggable plus (SFP+) ports and 4 quad small-form-factor pluggable (QSFP+) ports. You can increase the number of ports by using expansion modules. All EX4600 switches, except the EX4600-40F-S switch, ship with two power supplies and five fans installed by default. Expansion modules are optional components that must be separately ordered.
Table 1 on page 5 lists the EX4600 switch configurations.
Table 1: EX4600 Switches

Product Number

Ports

Number of Expansion Modules Supported

Power Supply

Airflow

EX4600-40F-AFI

24 SFP+ and 4 QSFP+ 2

Air In (FRU-to-

port)

Table 1: EX4600 Switches (Continued)

Product Number

Ports

Number of Expansion Modules Supported

Power Supply

Airflow

EX4600-40F-AFO

24 SFP+ and 4 QSFP+ 2

Air Out (port-to-

FRU)

EX4600-40F-DC-AFI

24 SFP+ and 4 QSFP+ 2

Air In (FRU-to-

port)

EX4600-40F-DC-AFO

24 SFP+ and 4 QSFP+ 2

Air Out (port-to-

FRU)

EX4600-40F-S

24 SFP+ and 4 QSFP+ 2

Order PSUs separately

Fan modules are not shipped by default.

Order fan modules separately

CAUTION: Do not mix: � AC and DC power supplies in the same chassis.
� Power supplies with different airflow labels (AFI) and (AFO) in the same chassis.
� Fan modules with different airflow labels (AIR INI) and (AIR OUT) in the same chassis.
� Power supplies and fan modules with different airflow labels (AIR INI) and AIR OUT) or AFI and AFO in the same chassis.

7
Understanding Redundancy of EX4600 Switch Components and Functionality
The following hardware components provide redundancy on an EX4600 switch: � Power supplies--The EX4600 switch can operate with one power supply. However, all EX4600
switches, except the EX4600-40F-S switch, ship with two power supplies preinstalled for redundancy. Each power supply provides power to all components in the switch. Installing two power provides full power redundancy to the switch. If one power supply fails or is removed, the second power supply balances the electrical load without interruption. � Cooling system--All EX4600 switches, except the EX4600-40F-S ship with five fan modules installed. If a fan module fails and leads to the overheating of the chassis, alarms occur and the switch might shut down.
EX4600 Chassis
IN THIS SECTION Chassis Physical Specifications for an EX4600 Switch | 7 Field-Replaceable Units in an EX4600 Switch | 8 Port Panel of an EX4600 Switch | 9 Access Port and Uplink Port LEDs on an EX4600 Switch | 10 Management Panel of an EX4600 Switch | 14 Chassis Status LEDs on an EX4600 Switch | 17 Expansion Modules for the EX4600 | 19
Chassis Physical Specifications for an EX4600 Switch
The EX4600 switch chassis is a rigid sheet-metal structure that houses the hardware components. Table 2 on page 8 summarizes the physical specifications of the EX4600 chassis.

Table 2: Physical Specifications for the EX4600 Switch Chassis

Product Number

Height

Width

Depth

EX4600

1.72 in. (4.3 cm) 17.36 in. (44.1 cm)

20.48 in. (4.37 cm)

Weight
With power supplies and fan modules installed: 21.7lbs ( 9.84 kg)

Field-Replaceable Units in an EX4600 Switch
Field-replaceable units (FRUs) are components that you can replace at your site. The EX4600 switch FRUs are hot-insertable and hot-removable: you can remove and replace one of them without powering off the switch or disrupting the switching function. FRU types are: � Power supplies � Fan modules � Optical transceivers � Expansion modules

CAUTION: Replace a failed power supply with a blank panel or a new power supply within one minute of removal to prevent chassis overheating. The switch continues to operate with only one power supply running. Replace a failed fan module with a new fan module within one minute of removal to prevent chassis overheating. Do not operate the switch for more than one minute after a fan module or power supply fails.

Table 3 on page 8 lists the FRUs for the EX4600 switch and actions to take before removing them. Table 3: FRUs in a EX4600 Switch

FRU

Required Action

Power supplies

None, if two power supplies are installed as recommended. If only one power is installed, you must power down the switch. See Removing a Power Supply from an EX4600 Switch.

Table 3: FRUs in a EX4600 Switch (Continued)

FRU

Required Action

Fan modules

None. See Removing a Fan Module from an EX4600 Switch for details.

Optical transceivers

None. We recommend that you disable the interface using the set interfaces interface-name disable command before you remove the transceiver. See Disconnect a Fiber-Optic Cable.

Expansion modules

None. See Removing an Expansion Module from an EX4600 Switch.

NOTE: If you have a Juniper Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.

SEE ALSO Installing and Removing EX4600 Switch Hardware Components | 121
Port Panel of an EX4600 Switch
The fixed portion of the port panel of the EX4600-40F switch supports up to a maximum of 40 logical 10 GbE ports. Twenty-four physical ports (0 through 23) support 10 Gbps small form-factor pluggable plus (SFP+) transceivers. These ports can be configured as access ports. See The Hardware Compatibility Tool for a list of supported transceivers. All 24 of these ports can be used for SFP+ transceivers or SFP+ direct attach copper (DAC) cables. You can use 1-Gigabit Ethernet SFP+ transceivers, 10Gigabit Ethernet SFP+ transceivers, and SFP+ direct attach copper cables in any access port. The remaining 16 logical ports are available for four 40 GbE ports (24 through 27) that support up to four quad small-form factor pluggable plus (QSFP+) transceivers. Each QSFP+ port can operate either as

10
a single 40 Gbps port or as a set of 4 independent 10 Gbps ports using QSFP+ breakout cables. The 40 GbE ports can be configured as either access ports or as uplinks. .
CAUTION: Do not install 1GbE copper transceivers (such as QFX-SFP-1GE-T) directly above or below another 1GbE copper transceiver. Use only the top row or bottom row to avoid damage to the device caused by some types of copper transceivers when the transceivers are installed above or below each other. However, if you are using copper transceivers with the OEM part number FCLF8521P2BTL-J1 printed on the transceiver label, you can install the transceivers in any port with no restrictions. For devices that support 10GbE copper transceivers, there is no similar restriction.
Figure 4 on page 10 shows the port panel of an EX4600 switch.
Figure 4: EX4600 Switch Port Panel

1-- Electrostatic Discharge (ESD) terminal 2-- 10 G ports (24)

3-- 40 GbE ports (4) 4-- Expansion module bays with cover panels (2)

Access Port and Uplink Port LEDs on an EX4600 Switch
The Link/Activity and Status LED configuration for an EX4600 switch uses bi-colored LEDs. The two figures in this topic show the location of those LEDs:

11 � Figure 5 on page 11 shows the location of the LEDs on the SFP+ access ports on the EX4600 and
Figure 6 on page 11 shows the location of the LEDs on the QSFP+ uplink ports on the EX4600. Figure 5: LEDs on the SFP+ Ports
Figure 6: LEDs on the QSFP+ Ports
The LED in Figure 5 on page 11 labeled Link/Activity indicate link activity or a fault. The LED labeled Status in indicates transceiver presence. Table 4 on page 12 describes how to interpret the SFP+ port LEDs.

Table 4: Network Port LEDs on SFP+ Ports on an EX4600 Switch

LED

Color State

Description

Link/Activity Unlit Off

The port is administratively disabled, there is no power, the link is down, or there is a fault.

Green On steadily A link is established, but there is no link activity.

Blinking

A link is established, and there is link activity.

Amber Blinking

The beacon is enabled on the port.

Status

Unlit Off

The link is down.

Amber Blinking

The beacon function is enabled on the port.

Green Blinking

A 1-Gigabit Ethernet transceiver is installed in the port and the link is established.

Green On steadily A 10-Gigabit Ethernet transceiver is installed in the port and link is established.

As shown in Figure 6 on page 11, there are four bi-color LEDs for each QSFP+ port. The first LED is used and the remaining LEDs are not used when the interface is configured for 40-Gigabit Ethernet and connected to a QSFP+ transceiver. All four LEDs are used when the interface is configured for 10Gigabit Ethernet and the port is connected using an optical split cable or a copper DACBO cable. Table 5 on page 13 describes how to interpret the QSFP+ LEDs.

Table 5: Network Port LEDs on QSFP+ Ports on an EX4600 Switch

Color

State

Description

Unlit

Off

The port is administratively disabled, there is no power, the link is down, or there is a fault.
NOTE: When configured for 10-Gigabit Ethernet, the LED remains unlit only if all four of the 10-Gigabit Ethernet SFP+ breakout links are down.

Green

On steadily

A link is established, but there is no link activity.
NOTE: When configured for 10-Gigabit Ethernet, the LED is lit green when at least one of the four 10Gigabit Ethernet SFP+ breakout links is established.

Blinking

A link is established, and there is link activity.
NOTE: When configured for 10-Gigabit Ethernet, the LED is lit green when at least one of the four 10Gigabit Ethernet SFP+ breakout links is established.

Amber

Blinking

All four LEDs blink to indicate the beacon function was enabled on the port.

14
Management Panel of an EX4600 Switch
The management panel of the EX4600 switch is located on the Field Replaceable Unit (FRU) side of the switch, as shown in Figure 7 on page 14. See Figure 8 on page 15 for management panel details.
Figure 7: EX4600 Switch, FRU Side with Fans Modules and Power Supplies Installed

1-- Management panel 2-- Fan modules

3-- Power supply units

15 Figure 8: Management Panel Components

1-- Status LEDs 2-- em1�SFP management Ethernet port (C1)

4-- RJ-45 console port (CON) and em0�RJ-45 (1000 Base-T) management Ethernet port (C0)
5-- USB port

Cage (socket for either 1 GbE copper SFP or fiber SFP)
3-- Reset button, see caution statement below

CAUTION: Do not use the Reset button to restart the power sequence unless under the direction of Juniper Networks Technical Assistance Center (JTAC).
The management panel consists of the following components: � Status LEDs
� ALM (Alarm or beacon) � Unlit indicates the switch is halted or that there is no alarm. � Red indicates a major alarm. � Amber indicates a minor alarm.
� SYS (System) � Unlit indicates the switch is powered off or halted.

16
� Solid green indicates that Junos OS for EX Series is loaded on the switch. � Blinking green indicates that the switch is a participating member in a Virtual Chassis. � MST (Primary) in a Virtual Chassis � Unlit indicates the switch is standalone or is a line card member in a Virtual Chassis. � Solid green indicates the switch is the primary in a Virtual Chassis. � Blinking green indicates the switch is the backup primary in a Virtual Chassis. � ID (Identification) � Unlit indicates the beacon feature is not enabled. � Blinking blue indicates the beacon feature is enabled. This feature is enabled using the request
chassis beacon command. � Switch model number � Management Ports C0 and C1
� C0�Use the RJ-45 connectors for 10/100/1000 BaseT. � C1�Use the SFP connector for 1000 BaseX. � USB port for image updates. � Console port (RJ-45) to support RS-232 serial ports. The LEDs above the port indicate status and link.

17
Chassis Status LEDs on an EX4600 Switch
The EX4600 switch has four status LEDs on the field-replaceable unit (FRU) end of the chassis, next to the management ports (see Figure 9 on page 17).
Figure 9: Chassis Status LEDs on an EX4600 Switch

1-- Status LEDs 2-- em1�SFP management Ethernet port (C1)

3-- RJ-45 console port (CON) and em0�RJ-45 (1000 Base-T) management Ethernet port (C0)
4-- USB port

Cage (socket for either 1 GbE copper SFP or fiber SFP)

CAUTION: Do not use the Reset button to restart the power sequence unless under the direction of Juniper Networks Technical Assistance Center (JTAC).
Table 6 on page 18 describes the chassis status LEDs on an EX4600 switch, their colors and states, and the status they indicate. You can view the colors of the three LEDs remotely through the CLI by issuing the operational mode command show chassis lcd.

Table 6: Chassis Status LEDs on an EX4600 Switch

Name

Color

State

ALM (Alarm or beacon) Unlit

Off

Red

On steadily

Amber

On steadily

SYS (System)

Unlit Green

Off On steadily

18
Description
The switch is halted or there is no alarm.
A major hardware fault has occurred, such as a temperature alarm or power failure, and the switch has halted. Power off the EX4600 switch by setting the AC power source outlet to the OFF (O) position, or unplugging the AC power cords. Correct any voltage or site temperature issues, and allow the switch to cool down. Power on the EX4600 switch and monitor the power supply and fan LEDs to help determine where the error is occurring.
A minor alarm has occurred, such as a software error. Power off the EX4600 switch by setting the AC power source outlet to the OFF (O) position, or unplugging the AC power cords. Power on the EX4600 switch and monitor the status LEDs to ensure that Junos OS boots properly.
The switch is powered off or halted.
Junos OS for EX Series is loaded on the switch.

Table 6: Chassis Status LEDs on an EX4600 Switch (Continued)

Name

Color

State

Description

MST (Primary)

Unlit

Off

The switch is standalone.

ID (Identification)

Unlit

Off

The beacon feature is not enabled on the switch. This feature is enabled using the request chassis beacon command.

Blue

Blinking

The beacon feature is enabled on

the switch. This feature is

enabled using the request

chassis beacon command.

SEE ALSO show chassis alarms request chassis beacon
Expansion Modules for the EX4600
IN THIS SECTION EX4600-EM-8F | 20 QFX-EM-4Q | 21
The EX4600 switch has two bays on the port panel in which you can optionally install one or two expansion modules. The EX4600 supports the same two expansion modules as the QFX5100, which increase port density:

20
� EX4600-EM-8F, which provides 8 additional 10-Gigabit Ethernet Enhanced Small Form-Factor Pluggable (SFP+) ports.
� QFX-EM-4Q, which provides 4 additional 40-Gigabit Quad SFP+ (QSFP+) ports. The EX4600 is configured for the QFX-EM-4Q by default, but any combination of the two modules is supported. Expansion modules can be hot-inserted or hot-removed. However, when an EX4600-EM-8F is inserted instead of the default QFX-EM-4Q, the new configuration causes the interfaces to temporarily go down. Likewise when an EX4600-EM-8F is running on the EX4600 and it is swapped with a QFX-EM-4Q, the interfaces temporarily go down, which can cause a short disruption in traffic.
NOTE: Expansion modules and transceivers are not shipped with the switch and must be ordered separately.
EX4600-EM-8F
The EX4600-EM-8F, provides 8 additional 10-Gigabit Ethernet SFP+ ports or 8 additional 1-Gigabit SFP ports to one of the bays in the EX4600 switch. Figure 7 shows the ports and LEDs on the expansion module.
CAUTION: Copper SFP transceivers (1000BASE-T) are restricted to the top four ports or the bottom four ports; fiber SFP transceivers (1000BASE-X) can be used in any of the eight ports. Attempting to stack copper SFP transceivers causes internal damage to the module.
Figure 10: EX4600-EM-8F Faceplate and LEDs

1-- Expansion module status LED

2-- SFP+ port LEDs

When the expansion module is inserted into the expansion bay, the chassis detects the additional ports, recognizes them as 10GbE ports, and lights the Status LED.
Table 6 describes the Status LED on the EX4600-EM-8F. Table 7: EX4600-EM-8F Status LED

LED

State

Description

Unlit

� The expansion module is offline.

� The chassis is powered off.

Green

� The expansion module is online and functioning normally.

QFX-EM-4Q
The QFX-EM-4Q, provides 4 additional 40-Gigabit Ethernet QSFP+ ports to one of the bays in the EX4600 switch. Port 0 and port 2 can be used for port channelization by configuring the system mode for 104 port mode. Figure 11 on page 21 shows the QFX-EM-4Q ports and LEDs.
Figure 11: QFX-EM-4Q Faceplate and LEDs

1-- Expansion module status LED

2-- QSFP+ port LEDs

When the expansion module is inserted into the expansion bay, the chassis detects the additional ports, recognizes them as 40 GbE ports, and lights the Status LED.
Table 8 on page 22 describes the Status LED on the QFX-EM-4Q expansion module. Table 8: Expansion Module Status LED

LED

State

Description

Unlit

� The expansion module is offline.

� The chassis is powered off.

Green

� The expansion module is online and functioning normally.

EX4600 Cooling System
IN THIS SECTION Cooling System and Airflow in an EX4600 Switch | 22 Fan Module LED on an EX4600 Switch | 29
Cooling System and Airflow in an EX4600 Switch
IN THIS SECTION Fan Modules | 23 Do Not Install Components with Different Airflow or Wattage in the Switch | 27 Fan Module Status | 27

23
The cooling system in an EX4600 switch consists of five fan modules and a single fan in each power supply. The switch can be set up to work in one of two airflow directions: � Airflow In�Air enters the switch through the vents in the field-replaceable units (FRUs) � Airflow Out�Air enters the switch through the vents in the port panel. All EX4600 switches, except the EX4600-40F-S, are shipped with five fan modules and two power supplies. Order fans for the EX4600-40F-S separately.
CAUTION: Do not mix: � AC and DC power supplies in the same chassis. � Power supplies with different airflow labels (AFI) and (AFO) in the same chassis. � Fan modules with different airflow labels (AIR INI) and (AIR OUT) in the same
chassis. � Power supplies and fan modules with different airflow labels (AIR INI) and AIR OUT)
or AFI and AFOin the same chassis.
Fan Modules
The fan modules in EX4600 switches are hot-insertable and hot-removable field-replaceable units (FRUs). These fan modules are designed for one of the two available airflow directions airflow in (AIR IN) or airflow out (AIR IN)) and are the same fan modules used in the QFX5100 switches. Some modules are also color-coded for the indication of the airflow direction. The fan modules are installed in the fan module slots on the FRU end of the switch, next to the power supplies. The fan module slots are numbered 0 through 4 from left to right. Each slot has a fan icon next to it.

24 Figure 12 on page 24 shows the fan module for the EX4600 switch. Figure 12: Fan Module for EX4600 Switches
You remove and replace a fan module from the FRU end of the chassis. The switch continues to operate for a limited period of time (30 seconds) during the replacement of the fan module without thermal shutdown.
NOTE: All fan modules must be installed for optimal operation of the switch. The fan modules are available in two product SKUs that have different airflow directions--FRU-to-port airflow, indicated on some units by the azure blue color and the label AIR IN , or port-to-FRU, indicated by the gold color and the label AIR OUT . On legacy switches or switches with LCDs, this airflow is also called front-to-back and back-to-front. Table 9 on page 25 lists the available fan module product SKUs and the direction of airflow in them:

Table 9: Fan Modules for EX4600 Switches

Fan Module

Airflow Diagram

Label on the Fan Module

Color of Fan Module

Direction of Airflow in the Fan Module

Power Supplies

QFX5100-FAN-AFI Figure 13 on page 26

AIR IN

Juniper azure blue

FRU-to-port, that is, air enters from the FRUs; air exhausts from the vents in the port panel (also known as backto-front airflow).

You must install only power supplies that have AFI labels or that are Juniper azure blue, in switches in which the fan modules have AIR IN labels or that are Juniper azure blue..

QFX5100-FANAFO

Figure 14 on page 26

AIR OUT

Juniper gold

Port-to-FRU, that is, air enters through vents on the port panel; air exhausts out the FRUs (also known as frontto-back airflow).

You must install only power supplies that have AFO labels or that are Juniper gold in switches in which the fan modules have AIR OUT labels or that are Juniper gold.

26 In data center deployments, position the switch in such a manner that the AIR IN labels on switch components are next to the cold aisle, and AIR OUT labels on switch components are next to the hot aisle. Figure 13: Air In Airflow Through EX4600 Switch Chassis
Figure 14: Air Out Airflow Through EX4600 Switch Chassis

27
Do Not Install Components with Different Airflow or Wattage in the Switch
Do not mix power supplies with different airflow labels (AFI and AFO) and fan modules with different airflow labels (AIR IN and AIR OUT ) in the same chassis. If the fan modules have AIR IN labels, the power supplies must also have AFI labels; if the fan modules have AIR OUT labels, the power supplies must also have AFI labels. Azure blue and gold modules may not be mixed. Mixing components with different airflow directions in the same chassis hampers the performance of the cooling system of the switch and leads to overheating of the chassis.
CAUTION: The system raises an alarm if a fan module fails or if the ambient temperature inside the chassis rises above the acceptable range. If the temperature inside the chassis rises above the threshold temperature, the system shuts down automatically.
Do not mix fans with different wattage. Only use the replacement fans that are designed for use with your EX4600. See Table 9 on page 25 for the correct part number for your switch product SKU.
CAUTION: Do not mix AC and DC power supplies in the same chassis. Do not mix power supplies with different wattages in the same chassis.
However if you need to convert an EX4600 switch to have a different airflow, you can change the airflow pattern. To convert an AIR IN product SKU to an AIR OUT product SKU or an AIR OUT product SKU to a AIR IN product SKU, you must replace all of the fans and power supplies at one time to use the new direction. The system raises an alarm when the system is converted, which is normal.
Fan Module Status
You can check the status of fans through the show system alarms command or by looking at the LEDs next to each fan module. Each switch has a Status LED (labeled ST) for each fan module on the left side of the corresponding fan module slot. It indicates the status of all the fan modules. Table 10 on page 28 describes the Status LED on the fan module in an EX4600 switch.

Table 10: Fan Module LED

LED State

Description

Solid Green

The individual fan module is present. After the hardware senses the fan module, software ensures the airflow is consistent with the other fan modules and that it is functioning correctly.

Blinking Amber

Indicates one of the following: � The fan module is not present. � The airflow direction is not consistent among the modules. � The fan module is not functioning normally.

Under normal operating conditions, the fan modules operate at a moderate speed. Temperature sensors in the chassis monitor the temperature within the chassis.
The system raises an alarm if a fan module fails or if the ambient temperature inside the chassis rises above the acceptable range. If the temperature inside the chassis rises above the threshold temperature, the system shuts down automatically.

SEE ALSO Clearance Requirements for Airflow and Hardware Maintenance for an EX4600 Switch | 60

29
Fan Module LED on an EX4600 Switch
Figure 15 on page 29 shows the location of the LED next to the fan module. Figure 15: Fan Module LED in an EX4600 Switch

1-- Fan LED Table 11 on page 29 describes the function of the fan tray LED. Table 11: Fan Tray LED in an EX4600 Switch

Name

Color

State

Description

Fan

Green

On steadily

The fan module is operating

normally. The system has verified

that the module is engaged, that the

airflow is in the correct direction,

and that the fan is operating

correctly.

Amber

Blinking

An error has been detected in the fan module. Replace the fan module as soon as possible. Either the fan has failed or it is seated incorrectly. To maintain proper airflow through the chassis, leave the fan module installed in the chassis until you are ready to replace it.

30
EX4600 Power System
IN THIS SECTION AC Power Supply in an EX4600 Switch | 30 AC Power Supply LEDs on an EX4600 Switch | 33 AC Power Specifications for an EX4600 Switch | 34 AC Power Cord Specifications for an EX4600 Switch | 35 DC Power Supply in an EX4600 Switch | 36 DC Power Supply LEDs in EX4600 Switches | 39 DC Power Specifications for an EX4600 Switch | 40 Grounding Cable and Lug Specifications for an EX4600 Switch | 41
AC Power Supply in an EX4600 Switch
Except for the EX4600-40F-S switch, the EX4600 is shipped from the factory with two power supplies pre-installed. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function. The AC power supply is 650 W. It is the same power supply used in Juniper Networks QFX5100 switches.
CAUTION: Do not mix power supplies with different airflow or different wattage. The system raises an alarm when a power supply having a different airflow or wattage is inserted into the chassis.

31 See Figure 16 on page 31 for an example of the power supply. Figure 16: AC Power Supply in EX4600 Switches

1-- Handle 2-- Security latch

3-- AC appliance inlet 4-- Ejector lever

The power supply provides FRU-to-port or port-to-FRU airflow depending on the product SKU you purchase. On legacy switches, or switches with an LCD, this airflow is called back-to-front and front-toback. The power supplies either have labels on the handles that indicate the direction of airflow or they have color-coded handles with a fan icon. See Figure 17 on page 32 for an example of the power

32
supply. Either a power supply has the label AFI or a blue handle, which denotes FRU-to-port airflow. A power supply with the label AFO or a gold-colored handle denotes port-to-FRU airflow.
Figure 17: Power Supply Handle Detail

1-- Fan icon on handle

CAUTION: Verify that the airflow direction on the power supply handle matches the direction of airflow in the chassis. Ensure that each power supply you install in the chassis has the same airflow direction. If you install power supplies with two different airflow directions, Junos OS raises an alarm, and the fault ALM LED blinks amber. If you need to convert the airflow pattern on a chassis, you must change out all the fans and power supplies at one time to use the new direction.

Table 12 on page 32 shows the different power supplies and their direction of airflow. Table 12: Airflow Direction in EX4600 and QFX5100 AC Power Supplies

Product Number

Direction of Airflow

Color of Power Supply Handle

JPSU-650W-AC-AFI QFXC01-PWRACI-650A

FRU-to-port

Juniper azure blue

JPSU-650W-AC-AFO

Port-to-FRU

Juniper gold

33 To avoid electrical injury, carefully follow instructions in Connecting AC Power to an EX4600 Switch.
SEE ALSO Connecting AC Power to an EX4600 Switch | 83
AC Power Supply LEDs on an EX4600 Switch
Figure 18 on page 33 shows the location of the LEDs on the power supply. Figure 18: AC Power Supply LEDs on an EX4600 Switch

Table 13 on page 33 describes the LEDs on the AC power supplies. Table 13: AC Power Supply LEDs on a EX4600 Switch

LED Color State

Description

AC OK Unlit Off

The power supply is disconnected from power, or power is not coming into the power supply.

Green On steadily Power is coming into the power supply.

DC OK Unlit Off

The power supply is disconnected from power, or the power supply is not sending out power correctly.

Green On steadily The power supply is sending out power correctly.

Table 13: AC Power Supply LEDs on a EX4600 Switch (Continued)

LED Color State

Description

Fault

Amber

On steadily

An error has been detected in the power supply. Replace the power supply as soon as possible. To maintain proper airflow through the chassis, leave the power supply installed in the chassis until you are ready to replace it.

NOTE: If the AC OK LED and the DC OK LED are unlit, either the AC power cord is not installed properly or the power supply fuse has failed. If the AC OK LED is lit and the DC OK LED is unlit, the AC power supply is installed properly, but the power supply has an internal failure.

AC Power Specifications for an EX4600 Switch

Table 14 on page 34 describes the AC power specifications for an EX4600 switch. Table 14: AC Power Specifications for an EX4600 Switch

Item

Specification

AC input voltage

Operating range: 100�240 VAC

AC input line frequency

50�60 Hz

AC input current rating

� 4.5 A at 100�120 VAC � 2.0 A at 200�240 VAC

Typical power consumption: 230 W

Maximum power consumption: 365 W

AC Power Cord Specifications for an EX4600 Switch
Detachable AC power cords are shipped with the chassis, if you include them as part of your order. The coupler is type C13 as described by International Electrotechnical Commission (IEC) standard 60320. The plug end of the power cord fits into the power source outlet that is standard for your geographical location.
NOTE: In North America, AC power cords must not exceed 4.5 meters (approximately 14.75 feet) in length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52 and Canadian Electrical Code (CEC) Section 4-010(3). The cords that can be ordered for the EX4600 switch are in compliance.

Table 15 on page 35 lists AC power cord specifications provided for each country or region. Table 15: AC Power Cord Specifications

Country/Region Electrical Specifications Plug Standards

Juniper Model Number

Graphic

Australia

250 VAC, 10 A, 50 Hz

AS/NZ 3109-1996

CBL-EX-PWRC13-AU

China

250 VAC, 10 A, 50 Hz

GB 1002-1996

CBL-EX-PWRC13-CH

Europe (except Italy, Switzerland, and United Kingdom)

250 VAC, 10 A, 50 Hz

CEE (7) VII

Italy

250 VAC, 10 A, 50 Hz

CEI 23-16/VII

CBL-EX-PWRC13-EU
CBL-EX-PWRC13-IT

Japan

125 VAC, 12 A, 50 Hz or 60 Hz

JIS C8303

CBL-EX-PWRC13-JP

Table 15: AC Power Cord Specifications (Continued) Country/Region Electrical Specifications Plug Standards

Juniper Model Number

Graphic

North America 125 VAC, 13 A, 60 Hz

CAN/CSA No. 49-92

CBL-EX-PWRC13-US

South Korea

250 VAC, 10 A, 60 Hz

KSC 8305; K60884-1

CBL-EX-PWRC13-KR

Switzerland

250 VAC, 10 A, 50 Hz

SEV 1011 SEV 1991; EN 60320 C13

CBL-EX-PWRC13-SZ

United Kingdom 250 VAC, 10 A, 50 Hz

BS 1363/A

CBL-EX-PWRC13-UK

DC Power Supply in an EX4600 Switch
Except for the EX4600-40F-S switch, the EX4600 is shipped from the factory with two power supplies pre-installed. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function.

37
The DC power supply is 650 W with dual feeds for power resiliency. It is same power supply that is used in the Juniper Networks QFX5100 line of switches (see Figure 19 on page 37).
Figure 19: DC Power Supply in EX4600 and QFX5100 Switches

1-- Terminal block 2-- ESD grounding point

3-- Ejector lever 4-- Handle

38
NOTE: The DC power supply in the switch has four terminals labeled V-, V-, V+, and V+ (see Figure 20 on page 38) for connecting DC power source cables labeled positive (+) and negative (�).
Figure 20: DC Power Supply Faceplate in EX4600 Switches

1-- Feed B input terminals 2-- Feed A input terminals 3-- Terminal block 4-- Ejector lever

5-- ESD grounding point 6-- Fault LED 7-- Output LED 8-- Input LED

To supply sufficient power, terminate the DC input wiring on a facility DC source that is capable of supplying a minimum of 7 A at �48 VDC.

To avoid electrical injury, carefully follow instructions in Installing a Power Supply in an EX4600 Switch and Removing a Power Supply from an EX4600 Switch.

39 SEE ALSO
Connecting DC Power to an EX4600 Switch | 85
DC Power Supply LEDs in EX4600 Switches
Figure 21 on page 39 shows the location of the LEDs on the DC power supply. Figure 21: DC Power Supply Faceplate on an EX4600 Switch

1-- Input LED 2-- Output LED

3-- Fault LED

CAUTION: The V+ terminals are shunted internally together, as are the V- terminals. The same polarity terminal can be wired together from the same source to provide an additional current path in a higher power chassis. Do not connect the terminals to different sources.
Table 16 on page 40 describes the LEDs on the DC power supplies.

Table 16: DC Power Supply LEDs on an EX4600 Switch

LED

Color

State

Unlit

Off

Green

On steadily

Out

Unlit

Off

Fault

Green Amber

On steadily On steadily

Description
The power supply is disconnected from power, or power is not coming into the power supply.
Power is coming into the power supply.
The power supply is disconnected from power, or the power supply is not sending out power correctly.
The power supply is sending out power correctly.
An error has occurred in the power supply. Replace the power supply as soon as possible. To maintain proper airflow through the chassis, leave the power supply installed in the chassis until you are ready to replace it.

DC Power Specifications for an EX4600 Switch
Table 17 on page 41 describes the DC power specifications for DC product SKUs of the EX4600 switch.

Table 17: DC Power Specifications for an EX4600 Switch

Item

Specifications

DC input voltage

� Rated operating voltage: �48 VDC to -60 VDC � Operating voltage range: -40 VDC through �72 VDC

DC input current rating

10 A maximum

Typical power consumption

300 W

Maximum power consumption

385 W

Grounding Cable and Lug Specifications for an EX4600 Switch
For installations that require a separate grounding conductor to the chassis, the switch must be adequately grounded before power is connected to ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements. To ground an EX4600 switch, connect a grounding cable to earth ground and then attach it to the chassis grounding points.
WARNING: The switch is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earthing terminal must be permanently connected to earth ground for installations that require a separate grounding conductor to the chassis.
CAUTION: Before switch installation begins, a licensed electrician must attach a cable lug to the grounding cables that you supply. See Connecting Earth Ground to an EX4600 Switch. A cable with an incorrectly attached lug can damage the switch.
Before connecting the switch to earth ground, review the following information:
� A protective earthing terminal bracket is provided in the accessory kit for connecting the switch to earth ground. This L-shaped bracket attaches to the side of the EX4600 chassis through the mounting bracket, providing a protective earthing terminal for the switch.

42
� The grounding lug required is a Panduit LCD10-10A-L or equivalent (not provided).. The grounding lug should accommodates 14�10 AWG (2�5.3 mm�) stranded wire.
� The grounding cable that you provide for a EX4600 must be 14 AWG (2 mm�), minimum 60� C wire, or as permitted by the local code.
� Ensure you have two SAE 10-32 washers and screws to attach the cable and bracket (not provided).

2 CHAPTER
Site Planning, Preparation, and Specifications
Site Preparation Checklist for an EX4600 Switch | 44 EX4600 Site Guidelines and Requirements | 46 EX4600 Network Cable and Transceiver Planning | 61 EX4600 Management Cable Specifications and Pinouts | 70

44
Site Preparation Checklist for an EX4600 Switch

The checklist in Table 18 on page 44 summarizes the tasks you need to perform when preparing a site for EX4600 switch installation.
Table 18: Site Preparation Checklist

Item or Task

For More Information

Performed By

Date

Environment

Verify that environmental factors such as temperature and humidity do not exceed switch tolerances.

"Environmental Requirements and Specifications for EX Series Switches" on page 46

Power
Measure the distance between external power sources and switch installation site.

Calculate the power consumption and requirements.

"AC Power Specifications for an EX4600 Switch" on page 34

Rack or Cabinet

Verify that your rack or cabinet meets the minimum requirements for the installation of the switch.

"Rack Requirements for an EX4600 Switch" on page 56

"Cabinet Requirements for an EX4600 Switch" on page 58

Table 18: Site Preparation Checklist (Continued)

Item or Task

For More Information

Performed By

Date

Plan rack or cabinet location, including required space clearances.

"Clearance Requirements for Airflow and Hardware Maintenance for an EX4600 Switch" on page 60

Secure the rack or cabinet to the floor and building structure.

Cables

Acquire cables and connectors:
� Determine the number of cables needed based on your planned configuration.
� Review the maximum distance allowed for each cable. Choose the length of cable based on the distance between the hardware components being connected.

"Determining Interface Support for an EX4600 Switch" on page 61

Plan the cable routing and management.

RELATED DOCUMENTATION
General Safety Guidelines and Warnings | 143 General Site Guidelines | 0 Installing and Connecting an EX4600 Switch | 75

46
EX4600 Site Guidelines and Requirements
IN THIS SECTION Environmental Requirements and Specifications for EX Series Switches | 46 General Site Guidelines | 54 Site Electrical Wiring Guidelines | 55 Rack Requirements for an EX4600 Switch | 56 Cabinet Requirements for an EX4600 Switch | 58 Clearance Requirements for Airflow and Hardware Maintenance for an EX4600 Switch | 60
Environmental Requirements and Specifications for EX Series Switches
The switch must be installed in a rack or cabinet housed in a dry, clean, well-ventilated, and temperature-controlled environment. Ensure that these environmental guidelines are followed: � The site must be as dust-free as possible, because dust can clog air intake vents and filters, reducing
the efficiency of the switch cooling system. � Maintain ambient airflow for normal switch operation. If the airflow is blocked or restricted, or if the
intake air is too warm, the switch might overheat, leading to the switch temperature monitor shutting down the switch to protect the hardware components. Table 19 on page 47 provides the required environmental conditions for normal switch operation.

Table 19: EX Series Switch Environmental Tolerances

Switch or device

Environment Tolerance

Altitude

Relative Humidity

Temperature

Seismic

EX2200-C

No performance degradation up to 5,000 feet (1524 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 104� F (40� C) at altitudes up to 5,000 ft (1,524 m).

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

For information about extended temperature SFP transceivers supported on EX2200 switches, see Pluggable Transceivers Supported on EX2200 Switches.

EX2200 (except EX2200-C switches)

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX2300-C

No performance degradation up to 5,000 feet (1524 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

Table 19: EX Series Switch Environmental Tolerances (Continued)

Switch or device

Environment Tolerance

Altitude

Relative Humidity

Temperature

Seismic

EX2300 (except EX2300-C switches)

No performance degradation up to 13,000 feet (3962 meters) at 104� F (40� C) as per GR-63

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX3200

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX3300

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX3400

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

Table 19: EX Series Switch Environmental Tolerances (Continued)

Switch or device

Environment Tolerance

Altitude

Relative Humidity

Temperature

Seismic

EX4200

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX4300
The maximum thermal output for EX4300-48T is 423 BTU/ hour and for EX4300-48P is 5844 BTU/ hour.

EX4300 switches except the EX4300-48MP model-- No performance degradation up to 10,000 feet (3048 meters)
EX4300-48MP model-- No performance degradation up to 6,000 feet (1829 meters)

EX4300 switches except the EX4300-48MP model -- Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)
EX4300-48MP model -- Normal operation ensured in the relative humidity range 5% through 90% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX4500

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

Table 19: EX Series Switch Environmental Tolerances (Continued)

Switch or device

Environment Tolerance

Altitude

Relative Humidity

Temperature

Seismic

EX4550

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

� EX4550-32F switches-- Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

� EX4550-32T switches-- Normal operation is ensured in the temperature range 32� F through 104� F (40� C)

Table 19: EX Series Switch Environmental Tolerances (Continued)

Switch or device

Environment Tolerance

Altitude

Relative Humidity

Temperature

Seismic

EX4600

No performance degradation to 6,562 feet (2000 meters)

Normal operation ensured in the relative humidity range 5% through 90%, noncondensing
� Short-term operation ensured in the relative humidity range 5% through 93%, noncondensing
NOTE: As defined in NEBS GR-63CORE, Issue 4, short-term events can be up to 96 hours in duration but not more than 15 days per year.

� Normal operation ensured in the temperature range 32� F (0� C) through 113� F (45� C)
� Nonoperating storage temperature in shipping container: � 40� F (�40� C) through 158� F (70� C)

Complies with Zone 4 earthquake requirements per NEBS GR-63-CORE, Issue 4.

EX4650

No performance degradation to 6,000 feet (1829 meters)

Normal operation ensured in the relative humidity range 10% through 85% (condensing)

Normal operation is ensured in the temperature range 32� F (0� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

Table 19: EX Series Switch Environmental Tolerances (Continued)

Switch or device

Environment Tolerance

Altitude

Relative Humidity

Temperature

Seismic

EX6210

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation is ensured in the temperature range 32� F (0� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX8208

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation is ensured in the temperature range 32� F (0� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX8216

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation is ensured in the temperature range 32� F (0� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

EX9204

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 5% through 90% (noncondensing)

Normal operation is ensured in the temperature range 32� F (0� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63.

Nonoperating storage temperature in shipping container: � 40� F (�40� C) to 158� F (70� C)

Table 19: EX Series Switch Environmental Tolerances (Continued)

Switch or device

Environment Tolerance

Altitude

Relative Humidity

Temperature

Seismic

EX9208

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 5% through 90% (noncondensing)

Normal operation is ensured in the temperature range 32� F (0� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63.

Nonoperating storage temperature in shipping container: � 40� F (�40� C) to 158� F (70� C)

EX9214

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 5% through 90% (noncondensing)

Normal operation is ensured in the temperature range 32� F (0� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63.

Nonoperating storage temperature in shipping container: � 40� F (�40� C) through 158� F (70� C)

Table 19: EX Series Switch Environmental Tolerances (Continued)

Switch or device

Environment Tolerance

Altitude

Relative Humidity

Temperature

Seismic

EX9251
The maximum thermal output is 1705 BTU/ hour (500 W).

No performance degradation up to 10,000 ft (3048 m)

Normal operation ensured in relative humidity range of 5% to 90%, noncondensing

Normal operation ensured in temperature range of 32� F (0� C) to 104� F (40� C)
Nonoperating storage temperature in shipping container: � 40� F (�40� C) to 158� F (70� C)

Complies with Telcordia Technologies Zone 4 earthquake requirements

XRE200

No performance degradation up to 10,000 feet (3048 meters)

Normal operation ensured in the relative humidity range 10% through 85% (noncondensing)

Normal operation ensured in the temperature range 41� F (5� C) through 104� F (40� C)

Complies with Zone 4 earthquake requirements as per GR-63, Issue 4.

NOTE: Install EX Series switches only in restricted areas, such as dedicated equipment rooms and equipment closets, in accordance with Articles 110� 16, 110� 17, and 110� 18 of the National Electrical Code, ANSI/NFPA 70.

General Site Guidelines
Efficient device operation requires proper site planning and maintenance and proper layout of the equipment, rack or cabinet (if used), and wiring closet. To plan and create an acceptable operating environment for your device and prevent environmentally caused equipment failures:

55
� Keep the area around the chassis free from dust and conductive material, such as metal flakes. � Follow prescribed airflow guidelines to ensure that the cooling system functions properly and that
exhaust from other equipment does not blow into the intake vents of the device. � Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent damaging the
equipment. Static discharge can cause components to fail completely or intermittently over time. � Install the device in a secure area, so that only authorized personnel can access the device.

Site Electrical Wiring Guidelines
Table 20 on page 55 describes the factors you must consider while planning the electrical wiring at your site.

WARNING: You must provide a properly grounded and shielded environment and use electrical surge-suppression devices.
Avertissement Vous devez �tablir un environnement prot�g� et convenablement mis � la terre et utiliser des dispositifs de parasurtension.

Table 20: Site Electrical Wiring Guidelines

Site Wiring Factor

Guidelines

Signaling limitations

If your site experiences any of the following problems, consult experts in electrical surge suppression and shielding:
� Improperly installed wires cause radio frequency interference (RFI).
� Damage from lightning strikes occurs when wires exceed recommended distances or pass between buildings.
� Electromagnetic pulses (EMPs) caused by lightning damage unshielded conductors and electronic devices.

Table 20: Site Electrical Wiring Guidelines (Continued)

Site Wiring Factor

Guidelines

Radio frequency interference

To reduce or eliminate RFI from your site wiring, do the following:
� Use a twisted-pair cable with a good distribution of grounding conductors.
� If you must exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal when applicable.

Electromagn etic compatibilit y

If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly from lightning or radio transmitters, seek expert advice.
Some of the problems caused by strong sources of electromagnetic interference (EMI) are:

� Destruction of the signal drivers and receivers in the device

� Electrical hazards as a result of power surges conducted over the lines into the equipment

Rack Requirements for an EX4600 Switch
EX4600 Switches are designed to be installed on four-post racks. Rack requirements consist of: � Rack type � Mounting bracket hole spacing � Rack size and strength Table 21 on page 57 provides the rack requirements and specifications for the EX4600 Switch.

Table 21: Rack Requirements for the EX4600 Switch

Rack Requirement

Guidelines

Rack type

Use a four-post rack that provides bracket holes or hole patterns spaced at 1 U (1.75 in. or 4.45 cm) increments and that meets the size and strength requirements to support the weight.
A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310�D) published by the Electronics Industry Association.

Mounting bracket hole spacing

The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the switch can be mounted in any rack that provides holes spaced at that distance.

Rack size and strength

� Ensure that the rack complies with the standards for a 19-in. or 23-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310�D) published by the Electronics Industry Association.
� A 600-mm rack as defined in the four-part Equipment Engineering (EE); European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute.
The horizontal spacing between the rails in a rack that complies with this standard is usually wider than the device's mounting brackets, which measure 19 in. (48.26 cm) from outer edge to outer edge. Use approved wing devices to narrow the opening between the rails as required.
� Ensure that the rack rails are spaced widely enough to accommodate the switch chassis' external dimensions. The outer edges of the frontmounting brackets extend the width to 19 in. (48.26 cm).
� The front and rear rack rails must be spaced between 23 in. (58.5 cm) and 30.25 in. (76.8 cm) front-to-back.
� The rack must be strong enough to support the weight of the switch.
� Ensure that the spacing of rails and adjacent racks allows for proper clearance around the switch and rack.

Table 21: Rack Requirements for the EX4600 Switch (Continued)

Rack Requirement

Guidelines

Rack connection to building structure

� Secure the rack to the building structure.
� If earthquakes are a possibility in your geographical area, secure the rack to the floor.
� Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.

SEE ALSO Rack-Mounting and Cabinet-Mounting Warnings | 151

Cabinet Requirements for an EX4600 Switch

You can mount the EX4600 switch in a cabinet that contains a four-post 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association. Cabinet requirements consist of: � Cabinet size and clearance � Cabinet airflow requirements Table 22 on page 58 provides the cabinet requirements and specifications for the EX4600 switch. Table 22: Cabinet Requirements for the EX4600 Switch
Cabinet Requirement Guidelines

Cabinet size and clearance

The minimum cabinet size for accommodating a EX4600 switch is 36 in. (91.4 cm) deep. Large cabinets improve airflow and reduce the chance of overheating.

Table 22: Cabinet Requirements for the EX4600 Switch (Continued) Cabinet Requirement Guidelines

Cabinet airflow requirements

When you mount the switch in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent overheating.
� Ensure that the cool air supply you provide through the cabinet adequately dissipates the thermal output of the switch (or switches).
� Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet without recirculating into the switch. An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top allows the best airflow through the chassis. If the cabinet contains a top or doors, perforations in these elements assist with removing the hot air exhaust.
� The EX4600 fans exhaust hot air either through the vents on the port panel or through the fans and power supplies. Install the switch in the cabinet in a way that maximizes the open space on the FRU side of the chassis. This maximizes the clearance for critical airflow.
� Route and dress all cables to minimize the blockage of airflow to and from the chassis.
� Ensure that the spacing of rails and adjacent cabinets allows for the proper clearance around the switch and cabinet.

60
Clearance Requirements for Airflow and Hardware Maintenance for an EX4600 Switch
When planning the site for installing an EX4600 switch, you must allow sufficient clearance around the installed chassis (see Figure 22 on page 60). Figure 22: Clearance Requirements for Airflow and Hardware Maintenance for a EX4600 Switch
� For the cooling system to function properly, the airflow around the chassis must be unrestricted. See Cooling System and Airflow in an EX4600 Switch for more information about the airflow through the chassis.
� If you are mounting an EX4600 switch in a rack or cabinet with other equipment, ensure that the exhaust from other equipment does not blow into the intake vents of the chassis.
� Leave at least 24 in. (61 cm) both in front of and behind the EX4600 switch. For service personnel to remove and install hardware components, you must leave adequate space at the front and back of the switch. NEBS GR-63 recommends that you allow at least 30 in. (76.2 cm) in front of the rack or cabinet and 24 in. (61 cm) behind the rack or cabinet.

61
EX4600 Network Cable and Transceiver Planning
IN THIS SECTION Determining Interface Support for an EX4600 Switch | 61 Cable Specifications for QSFP+ Transceivers on EX4600 Series Switches | 62 Network Cable Specifications for EX4600 Switches | 64 Understanding EX Series Switches Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion | 65 Calculating the Fiber-Optic Cable Power Budget for EX Series Devices | 67 Calculating the Fiber-Optic Cable Power Margin for EX Series Devices | 68
Determining Interface Support for an EX4600 Switch
The 24 small form-factor pluggable (SFP) network ports on EX4600 switches support 10-Gigabit Ethernet transceivers and direct-attach copper (DAC) cables. The switch also supplies four quad small form-factor pluggable plus (QSFP+) ports for use as uplinks. These 40-Gigabit Ethernet ports support QSFP+ transceivers, QSFP+ DAC cables, and DAC breakout cables (DACBO). Each QSFP+ port on an EX4600 switch can be configured to operate as 10-Gigabit Ethernet interface by using a breakout cable or as a single 40-Gigabit Ethernet interface. The ports on an EX4600 switch are disabled by default. You enable a port through the CLI. Figure 23 on page 61 shows the different ports available on the EX4600 switch.
Figure 23: Port Panel of EX4600

1-- Electrostatic discharge (ESD) terminal 2-- 10 G ports (24)

3-- 40 GbE ports (4) 4-- Expansion module bays with cover panels (2)

62
You can find information about the optical transceivers supported on your Juniper device by using the Hardware Compatibility Tool. In addition to transceiver and connection type, the optical and cable characteristics�where applicable�are documented for each transceiver. The Hardware Compatibility Tool enables you to search by product, displaying all the transceivers supported on that device, or category, by interface speed or type. The list of supported transceivers for the EX4600 is located at https://pathfinder.juniper.net/hct/product/#prd=EX4600.
CAUTION: If you face a problem running a Juniper Networks device that uses a thirdparty optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.

Cable Specifications for QSFP+ Transceivers on EX4600 Series Switches
The 40-Gigabit Ethernet QSFP+ transceivers that are used in EX Series switches use 12-ribbon multimode fiber crossover cables with socket MPO/UP, MPO/UPC, or MPO/APC connectors. The fiber can be either OM3 or OM4. These cables are not sold by Juniper Networks.
CAUTION: To maintain agency approvals, use only a properly constructed, shielded cable.

TIP: Ensure that you order cables with the correct polarity. Vendors refer to these crossover cables as key up to key up, latch up to latch up, Type B, or Method B. If you are using patch panels between two QSFP+, ensure that the proper polarity is maintained through the cable plant.

Table 23 on page 62 describes the signals on each fiber. Table 24 on page 63 shows the pin-to-pin connections for proper polarity.
Table 23: QSFP+ MPO Cable Signals

Fiber

Signal

Tx0 (Transmit)

Table 23: QSFP+ MPO Cable Signals (Continued)

Fiber

Signal

Tx1 (Transmit)

Tx2 (Transmit)

Tx3 (Transmit)

Unused

Rx3 (Receive)

Rx2 (Receive)

Rx1 (Receive)

Rx0 (Receive)

Table 24: QSFP+ MPO Fiber-Optic Crossover Cable Pinouts

Table 24: QSFP+ MPO Fiber-Optic Crossover Cable Pinouts (Continued)

Network Cable Specifications for EX4600 Switches
EX4600 switches have interfaces that use various types of network cables. Table 25 on page 65 lists the specifications for the cables that connect the console (CON) and management (MGMT) ports to management devices.

NOTE: The EX4600 can be configured with SFP management ports that support 1000BASE-SX transceivers.

Table 25: Cable Specifications for Switch-to-Management-Device Connections

Ports on EX4600 Switches

Cable Specification

Cable/Wire Supplied

Maximum Length

Switch Receptacle

Additional Information

RJ-45 Console (CON) port

RS-232 (EIA-232) serial cable

One 7-foot (2.13-meter) length RJ-45 patch cable and RJ-45 to DB-9 adapter

7 ft (2.13 m)

RJ-45

Connect a Device to a Management Console Using an RJ-45 Connector

Management (MGMT) Ethernet port (10/100/1000 )

Category 5 cable or equivalent suitable for 1000BASE-T operation

One 7-foot (2.13-meter) length RJ-45 patch cable

328 feet (100 meters)

RJ-45

Connect a Device to a Network for Out-of-Band Management

Understanding EX Series Switches Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion
IN THIS SECTION Signal Loss in Multimode and Single-Mode Fiber-Optic Cable | 66 Attenuation and Dispersion in Fiber-Optic Cable | 66

66
To determine the power budget and power margin needed for fiber-optic connections, you need to understand how signal loss, attenuation, and dispersion affect transmission. EX Series switches use various types of network cable, including multimode and single-mode fiber-optic cable.
Signal Loss in Multimode and Single-Mode Fiber-Optic Cable
Multimode fiber is large enough in diameter to allow rays of light to reflect internally (bounce off the walls of the fiber). Interfaces with multimode optics typically use LEDs as light sources. However, LEDs are not coherent light sources. They spray varying wavelengths of light into the multimode fiber, which reflects the light at different angles. Light rays travel in jagged lines through a multimode fiber, causing signal dispersion. When light traveling in the fiber core radiates into the fiber cladding (layers of lower refractive index material in close contact with a core material of higher refractive index), higher-order mode loss (HOL) occurs. Together, these factors reduce the transmission distance of multimode fiber compared to that of single-mode fiber.
Single-mode fiber is so small in diameter that rays of light reflect internally through one layer only. Interfaces with single-mode optics use lasers as light sources. Lasers generate a single wavelength of light, which travels in a straight line through the single-mode fiber. Compared to multimode fiber, singlemode fiber has a higher bandwidth and can carry signals for longer distances. It is consequently more expensive.
Exceeding the maximum transmission distances can result in significant signal loss, which causes unreliable transmission.
Attenuation and Dispersion in Fiber-Optic Cable
An optical data link functions correctly provided that modulated light reaching the receiver has enough power to be demodulated correctly. Attenuation is the reduction in strength of the light signal during transmission. Passive media components such as cables, cable splices, and connectors cause attenuation. Although attenuation is significantly lower for optical fiber than for other media, it still occurs in both multimode and single-mode transmission. An efficient optical data link must transmit enough light to overcome attenuation.
Dispersion is the spreading of the signal over time. The following two types of dispersion can affect signal transmission through an optical data link:
� Chromatic dispersion, which is the spreading of the signal over time caused by the different speeds of light rays.
� Modal dispersion, which is the spreading of the signal over time caused by the different propagation modes in the fiber.
For multimode transmission, modal dispersion, rather than chromatic dispersion or attenuation, usually limits the maximum bit rate and link length. For single-mode transmission, modal dispersion is not a

67
factor. However, at higher bit rates and over longer distances, chromatic dispersion limits the maximum link length. An efficient optical data link must have enough light to exceed the minimum power that the receiver requires to operate within its specifications. In addition, the total dispersion must be within the limits specified for the type of link in Telcordia Technologies document GR-253-CORE (Section 4.3) and International Telecommunications Union (ITU) document G.957. When chromatic dispersion is at the maximum allowed, its effect can be considered as a power penalty in the power budget. The optical power budget must allow for the sum of component attenuation, power penalties (including those from dispersion), and a safety margin for unexpected losses.
Calculating the Fiber-Optic Cable Power Budget for EX Series Devices
To ensure that fiber-optic connections have sufficient power for correct operation, calculate the link's power budget when planning fiber-optic cable layout and distances to ensure that fiber-optic connections have sufficient power for correct operation. The power budget is the maximum amount of power the link can transmit. When you calculate the power budget, you use a worst-case analysis to provide a margin of error, even though all the parts of an actual system do not operate at the worst-case levels. To calculate the worst-case estimate for fiber-optic cable power budget (PB) for the link: 1. Determine values for the link's minimum transmitter power (PT) and minimum receiver sensitivity
(PR). For example, here, (PT) and (PR ) are measured in decibels, and decibels are referred to one milliwatt (dBm). PT = � 15 dBm PR = � 28 dBm
NOTE: See the specifications for your transmitter and receiver to find the minimum transmitter power and minimum receiver sensitivity.
2. Calculate the power budget (PB) by subtracting (PR) from (PT): � 15 dBm � (�28 dBm) = 13 dBm

Calculating the Fiber-Optic Cable Power Margin for EX Series Devices

Before calculating the power margin:
� Calculate the power budget (see Calculating the Fiber-Optic Cable Power Budget for EX Series Devices).
Calculate the link's power margin when planning fiber-optic cable layout and distances to ensure that fiber-optic connections have sufficient signal power to overcome system losses and still satisfy the minimum input requirements of the receiver for the required performance level. The power margin (PM) is the amount of power available after attenuation or link loss (LL) has been subtracted from the power budget (PB).
When you calculate the power margin, you use a worst-case analysis to provide a margin of error, even though all the parts of an actual system do not operate at worst-case levels. A power margin (PM ) greater than zero indicates that the power budget is sufficient to operate the receiver and that it does not exceed the maximum receiver input power. This means the link will work. A (PM) that is zero or negative indicates insufficient power to operate the receiver. See the specification for your receiver to find the maximum receiver input power.
To calculate the worst-case estimate for the power margin (PM) for the link:
1. Determine the maximum value for link loss (LL) by adding estimated values for applicable link-loss factors--for example, use the sample values for various factors as provided in Table 26 on page 68 (here, the link is 2 km long and multimode, and the (PB) is 13 dBm): Table 26: Estimated Values for Factors Causing Link Loss

Link-Loss Factor

Estimated Link-Loss Value

Sample (LL) Calculation Values

Higher-order mode losses (HOL)

� Multimode--0.5 dBm � Single mode--None

� 0.5 dBm � 0 dBm

Modal and chromatic dispersion

� Multimode--None, if product of bandwidth and distance is less than 500 MHz/km

� 0 dBm � 0 dBm

� Single mode--None

Table 26: Estimated Values for Factors Causing Link Loss (Continued)

Link-Loss Factor

Estimated Link-Loss Value

Sample (LL) Calculation Values

Connector

0.5 dBm

This example assumes 5 connectors. Loss for 5 connectors:
(5) * (0.5 dBm) = 2.5 dBm

Splice

0.5 dBm

This example assumes 2 splices. Loss for two splices:
(2) * (0.5 dBm) = 1 dBm

Fiber attenuation

� Multimode--1 dBm/km � Single mode--0.5 dBm/km

This example assumes the link is 2 km long. Fiber attenuation for 2 km:
� (2 km) * (1.0 dBm/km) = 2 dBm
� (2 km) * (0.5 dBm/km) = 1 dBm

Clock Recovery Module (CRM)

1 dBm

NOTE: For information about the actual amount of signal loss caused by equipment and other factors, see your vendor documentation for that equipment.
2. Calculate the (PM) by subtracting (LL) from (PB): PB � LL = PM (13 dBm) � (0.5 dBm [HOL]) � ((5) * (0.5 dBm)) � ((2) * (0.5 dBm)) � ((2 km) * (1.0 dBm/km)) � (1 dB [CRM]) = PM 13 dBm � 0.5 dBm � 2.5 dBm � 1 dBm � 2 dBm � 1 dBm = PM PM = 6 dBm

70
The calculated power margin is greater than zero, indicating that the link has sufficient power for transmission. Also, the power margin value does not exceed the maximum receiver input power. Refer to the specification for your receiver to find the maximum receiver input power.
EX4600 Management Cable Specifications and Pinouts
IN THIS SECTION Cable Specifications for Console and Management Connections for the EX4600 | 70 USB Port Specifications for an EX Series Switch | 71 Console Port Connector Pinout Information | 72 RJ-45 Management Port Connector Pinout Information | 73
Cable Specifications for Console and Management Connections for the EX4600
Table 27 on page 71 lists the specifications for the cables that connect the QFX Series to a management device.
NOTE: The QFX Series can be configured with SFP management ports that support 1000BASESX transceivers.

Table 27: Cable Specifications for Console and Management Connections for the QFX Series

Port on QFX Series Device

Cable Specification Cable Supplied

Maximum Length

Device Receptacle

Console port

RS-232 (EIA-232) serial cable

One 7-foot (2.13meter) length RJ-45 patch cable and RJ-45 to DB-9 adapter

7 feet (2.13 meters)

RJ-45

Management port

Category 5 cable or equivalent suitable for 1000BASE-T operation

One 7-foot (2.13meter) length RJ-45 patch cable

328 feet (100 meters)

RJ-45

USB Port Specifications for an EX Series Switch
The following Juniper Networks USB flash drives have been tested and are officially supported for the USB port on all EX Series switches: � RE-USB-1G-S � RE-USB-2G-S � RE-USB-4G-S
CAUTION: Any USB memory product not listed as supported for EX Series switches has not been tested by Juniper Networks. The use of any unsupported USB memory product could expose your EX Series switch to unpredictable behavior. Juniper Networks Technical Assistance Center (JTAC) can provide only limited support for issues related to unsupported hardware. We strongly recommend that you use only supported USB flash drives.
All USB flash drives used on EX Series switches must have the following features: � USB 2.0 or later. � Formatted with a FAT or MS-DOS file system.

72
� If the switch is running Junos OS Release 9.5 or earlier, the formatting method must use a primary boot record. Microsoft Windows formatting, by default, does not use a primary boot record. See the documentation for your USB flash drive for information about how your USB flash drive is formatted.

Console Port Connector Pinout Information
The console port on a Juniper Networks device is an RS-232 serial interface that uses an RJ-45 connector to connect to a console management device. The default baud rate for the console port is 9600 baud. Table 28 on page 72 provides the pinout information for the RJ-45 console connector.

NOTE: If your laptop or desktop PC does not have a DB-9 plug connector pin and you want to connect your laptop or desktop PC directly to a device, use a combination of the RJ-45 to DB-9 socket adapter and a USB to DB-9 plug adapter. You must provide the USB to DB-9 plug adapter.

Table 28: Console Port Connector Pinout Information

Signal

Description

RTS Output

Request to send

DTR Output

Data terminal ready

TxD Output

Transmit data

Signal Ground

Signal ground

Signal Ground

Signal ground

RxD Input

Receive data

CD Input

Data carrier detect

Table 28: Console Port Connector Pinout Information (Continued)

Signal

Description

CTS Input

RJ-45 Management Port Connector Pinout Information

Table 29 on page 73 provides the pinout information for the RJ-45 connector for the management port on Juniper Networks devices.
Table 29: RJ-45 Management Port Connector Pinout Information

Signal

Description

TRP1+

Transmit/receive data pair 1

TRP1--

Transmit/receive data pair 1

TRP2+

Transmit/receive data pair 2

TRP3+

Transmit/receive data pair 3

TRP3--

Transmit/receive data pair 3

TRP2--

Transmit/receive data pair 2

TRP4+

Transmit/receive data pair 4

TRP4--

Transmit/receive data pair 4

3 CHAPTER
Initial Installation and Configuration
Unpacking and Mounting an EX4600 Switch | 75 Connecting the EX4600 to Power | 81 Connecting the EX4600 to Management Devices | 90 Configuring Junos OS on the EX4600 | 93

75
Unpacking and Mounting an EX4600 Switch
IN THIS SECTION Installing and Connecting an EX4600 Switch | 75 Unpacking an EX4600 Switch | 76 Mounting an EX4600 Switch in a Rack or Cabinet | 77
Installing and Connecting an EX4600 Switch
You can mount an EX4600 switch: � Flush with the front of a 19-in. four-post rack. Use the standard mounting brackets provided with the
switch for this configuration. � Recessed 2 in. (5 cm) from the front of a 19-in. four-post rack. Use the extension bracket provided in
the standard mounting kit for this configuration. Recessed mounting is primarily used in enclosed cabinets. To install and connect an EX4600 switch: 1. Follow the instructions in Unpacking an EX4600 Switch. 2. Determine how the switch is to be mounted. Flush or recessed mounted in a rack or cabinet, see Mounting an EX4600 Switch in a Rack or Cabinet. 3. Follow the instructions in: a. Connecting Earth Ground to an EX4600 Switch b. Connecting DC Power to an EX4600 Switch or Connecting AC Power to an EX4600 Switch c. Register Products--Mandatory to Validate SLAs d. Configuring Junos OS on the EX4600

Unpacking an EX4600 Switch
The EX4600 switch chassis is a rigid sheet-metal structure that houses the hardware components. A EX4600 switch is shipped in a cardboard carton, secured with foam packing material. The carton also contains an accessory box.

CAUTION: EX4600 switches are maximally protected inside the shipping carton. Do not unpack the switch until you are ready to begin installation.

To unpack a EX4600 switch:
1. Move the shipping carton to a staging area as close to the installation site as possible, but where you have enough room to remove the system components.
2. Position the carton so that the arrows are pointing up. 3. Open the top flaps on the shipping carton. 4. Remove the accessory box and verify the contents against the inventory included in the box. Table 30
on page 76 lists the inventory of components supplied with a EX4600 switch. 5. Pull out the packing material holding the switch in place. 6. Verify the chassis components received:
� Two power supplies
� Five fan modules 7. Save the shipping carton and packing materials in case you need to move or ship the switch later.
Table 30: Inventory of Components Supplied with an EX4600 Switch

Component

Quantity

Chassis with five fan modules and two power supplies.

Rear mounting blades

Front mounting brackets

Extension brackets

RJ-45 cable and RJ-45 to DB-9 adapter

Table 30: Inventory of Components Supplied with an EX4600 Switch (Continued) Component

Quantity

Power cords

SEE ALSO Mounting an EX4600 Switch in a Rack or Cabinet | 77 Installing and Connecting an EX4600 Switch | 75
Mounting an EX4600 Switch in a Rack or Cabinet
IN THIS SECTION Before You Begin Rack Installation | 77 Four Post Procedure | 79
You can mount the EX4600 switch on a four post 19-in. rack or cabinet using the mounting kit provided with the device. For four post rack or cabinet installations, the mounting kit contains two front mounting rails with two matching rear mounting blades. This configuration allows either end of the switch to be mounted flush with the rack and still be adjustable for racks with different depths. The remainder of this topic uses "rack" to mean "rack or cabinet". Space the front and rear rack rails between 23 in (58.5 cm) to 30.25 in (76.8 cm) front-to-back.
Before You Begin Rack Installation
Before you begin mounting an EX4600 switch in the rack or cabinet: 1. Ensure that you understand how to prevent electrostatic discharge (ESD) damage. See Prevention of
Electrostatic Discharge Damage.

78
2. Verify that the site meets the requirements described in Site Preparation Checklist for an EX4600 Switch.
3. Place the rack in its permanent location, allowing adequate clearance for airflow and maintenance, and secure it to the building structure.
4. Read General Site Guidelines, with particular attention to Chassis Lifting Guidelines for an EX4600 Switch.
5. Remove the switch from the shipping carton (see Unpacking an EX4600 Switch). 6. Ensure that you have the following parts and tools available to mount the switch in a rack:
� ESD grounding strap (not provided).
� Blades, rails, or brackets (provided). � For four-post installations: � One pair of rear mounting blades. These mounting blades support the rear of the chassis and must be installed (provided).
� One pair of front mounting rails. The mounting blades slide into the mounting rails to support the switch (provided).
� Twelve screws to secure the mounting rails to the chassis (provided).
� Eight screws to secure the chassis and rear installation blades to the rack (not provided).
� Appropriate screwdriver for the mounting screws (not provided).
� Two power cords with plugs appropriate to your geographical location (provided).
� RJ-45 cable and RJ-45 to DB-9 serial port adapter (provided).
� Management host, such as a PC laptop, with a serial port (not provided). Optional equipment: Grounding cable kit with bracket, lug, and three nuts with integrated washers.
WARNING: The EX4600 switch must be supported at all four corners. Mounting the chassis using only the front brackets will damage the chassis and can result in serious bodily injury.
CAUTION: The EX4600 require two people for installation. If you are installing the EX4600 switch above 60 in. (152.4 cm) from the floor, you can remove the power supplies and fan modules to minimize the weight before attempting to install the switch.

79
CAUTION: If you are mounting multiple switches on a rack, mount the switch in the lowest position of the rack first. Proceed to mount the rest of the switches from the bottom to the top of the rack to minimize the risk of the rack toppling.
Four Post Procedure
To mount the switch on four posts in a rack using the provided mounting kit: 1. Attach the ESD grounding strap to your bare wrist and to a site ESD point. 2. Decide whether the Field Replaceable Unit (FRU) end of the switch or the port end is to be placed at
the front of the rack. Position the switch in such a manner that the AIR IN labels on components are next to the cold aisle and AIR OUT labels on components are next to the hot aisle. 3. Align the holes in the mounting rail with the holes on the side of the chassis. See Figure 24 on page 79 to see the proper alignment for the EX4600 switch.
Figure 24: Attaching Mounting Rails to the EX4600
4. Attach the mounting rail to the switch using the mounting screws (and cage nuts and washers if your rack requires them). Tighten the screws.
5. Repeats steps 4 and 5 on the opposite side of the switch. 6. Have one person grasp both sides of the switch, lift it, and position it in the rack so that the front
bracket is aligned with the rack holes.

80 7. Have a second person secure the front of the switch to the rack using four mounting screws (and
cage nuts and washers if your rack requires them.) Tighten the screws. See Figure 25 on page 80 for examples of connecting the mounting rails and blades. Figure 25: Attach EX4600 Switch to Rack
8. Continue to support the switch while sliding the rear mounting-blades into the channel of the side mounting-rails and securing the blades to the rack. Use the four mounting screws (and cage nuts and washers if your rack requires them) to attach each blade to the rack. Tighten the screws. See Figure 26 on page 80. Figure 26: Slide Mounting Blade into EX4600 Mounting Rail
9. Ensure that the switch chassis is level by verifying that all the screws on the front of the rack are aligned with the screws at the back of the rack.
RELATED DOCUMENTATION Connecting AC Power to an EX4600 Switch | 83 Connecting DC Power to an EX4600 Switch | 85

81
Connecting the EX4600 to Power
IN THIS SECTION Connecting Earth Ground to an EX4600 Switch | 81 Connecting AC Power to an EX4600 Switch | 83 Connecting DC Power to an EX4600 Switch | 85
Connecting Earth Ground to an EX4600 Switch
To ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements, you must connect an EX Series switch to earth ground before you connect power to the switch. You must use the protective earthing terminal on the switch chassis to connect the switch to earth ground (see Figure 27 on page 82). You must install the EX Series switch in a restricted�access location and ensure that the chassis is always properly grounded. EX Series switches have a two�hole protective grounding terminal provided on the chassis. We recommend that you use the protective grounding terminal as the preferred method for grounding the chassis regardless of the power supply configuration. However, if additional grounding methods are available, you can also use those methods. For example, you can use the grounding wire in the power cord of an AC power supply or use the grounding terminal or lug on a DC power supply. This system was tested to meet or exceed all applicable EMC regulatory requirements with the two-hole protective grounding terminal connected correctly. Ensure that a licensed electrician has attached an appropriate grounding lug to the grounding cable you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.
NOTE: Mount your switch in the rack or cabinet before attaching the grounding lug to the switch. See Mounting an EX4600 Switch in a Rack or Cabinet.
Ensure that you have the following parts and tools available: � Protective earthing terminal bracket--This bracket attaches to the EX4600 switch chassis through the
left front mounting bracket, providing a protective earthing terminal for the switch.

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� Grounding cable for your EX4600 switch--The grounding cable must be 14 AWG (2 mm�), minimum 90� C wire, or as permitted by the local code.
� Grounding lug for your grounding cable--The grounding lug required is a Panduit LCD10-10A-L or equivalent.
� Two SAE 10-32 washers and screws--To attach the grounding lug to the protective earthing terminal. � Screwdriver to attach the screws. To connect earth ground to a EX4600 switch: 1. Attach one end of the grounding cable to an appropriate earth ground site, such as the mounting
rack. 2. Position the grounding lug over the protective earthing terminal on the side of the chassis, which is
visible through the mounting bracket. 3. Secure the grounding lug to the protective earthing terminal with the washers and screws. See Figure
27 on page 82.
Figure 27: Connecting a Grounding Cable to an EX4600 Switch
4. Dress the grounding cable and ensure that it does not touch or block access to other device components and that it does not drape where people could trip over it.
SEE ALSO General Safety Guidelines and Warnings | 143 Grounded Equipment Warning | 155

83
Connecting AC Power to an EX4600 Switch
Ensure that you have a power cord appropriate for your geographical location available to connect AC power to the switch. Before you begin connecting AC power to the switch: � Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
damage (see Prevention of Electrostatic Discharge Damage). � Ensure that you have connected the device chassis to earth ground.
CAUTION: For installations that require a separate grounding conductor to the chassis, have a licensed electrician complete this connection before you connect the switch to power. For instructions on connecting earth ground, see Connect Earth Ground to an EX Series Switch.
� Install the power supply in the chassis. For instructions on installing a power supply in an EX4600 switch, see Installing a Power Supply in an EX4600 Switch.
The EX4600 is shipped from the factory with two power supplies. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function.
NOTE: Each power supply must be connected to a dedicated power source outlet.
To connect AC power to an EX4600 switch: 1. Attach the grounding strap to your bare wrist and to a site ESD point. 2. Ensure that the power supplies are fully inserted in the chassis and the latches are secure. If only one
power supply is installed, ensure a that blank cover panel is installed over the second power supply slot. 3. Locate the power cord or cords shipped with the switch; the cords have plugs appropriate for your geographical location. See AC Power Cord Specifications for an EX4600 Switch.
WARNING: Ensure that the power cord does not block access to device components or drape where people can trip on it.

84 4. Connect each power supply to the power sources. Insert the coupler end of the power cord into the
AC power cord inlet on the AC power supply faceplate. 5. Push the power cord retainer onto the power cord (see Figure 28 on page 84).
Figure 28: Connecting an AC Power Cord to an AC Power Supply in an EX4600 Switch
1-- Power cord retainer 6. If the AC power source outlet has a power switch, set it to the OFF (O) position.
NOTE: The switch powers on as soon as power is provided to the power supply. There is no power switch on the device. 7. Insert the power cord plug into an AC power source outlet. 8. If the AC power source outlet has a power switch, set it to the ON (|) position. 9. Verify that the AC and DC LEDs on each power supply are lit green. If the amber fault LED is lit, remove power from the power supply, and replace the power supply (seeRemoving a Power Supply from an EX4600 Switch ). Do not remove the power supply until you have a replacement power supply ready: the power supplies or a blank cover panel must be installed in the switch to ensure proper airflow.
CAUTION: Replace a failed power supply with a blank panel or new power supply within 1 minute of removal to prevent chassis overheating.

85
SEE ALSO AC Power Supply in an EX4600 Switch | 30
Connecting DC Power to an EX4600 Switch
Before you begin connecting DC power to the switch: � Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
damage (see Prevention of Electrostatic Discharge Damage). � Ensure that you have connected the switch chassis to earth ground.
CAUTION: Before you connect power to the switch, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the switch (for example, by causing a short circuit). To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, you must connect the chassis to earth ground before you connect it to power. For installations that require a separate grounding conductor to the chassis, use the protective earthing terminal on the switch chassis to connect to the earth ground. For instructions on connecting earth ground, see Connecting Earth Ground to an EX4600 Switch.
� Install the power supply in the chassis. For instructions on installing a power supply in an EX4600 switch, see Installing a Power Supply in an EX4600 Switch.
Ensure that you have the following parts and tools available: � DC power source cables (14�16 AWG) with ring lug (Molex 190700069 or equivalent) (not provided) � Phillips (+) screwdriver, number 2 (not provided) � Multimeter (not provided) The EX4600 is shipped from the factory with two power supplies. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function.

86
WARNING: DC-powered EX4600 switches are intended for installation only in a restricted access location.
NOTE: The battery returns of the DC power supply should be connected as an isolated DC return (DC-I).
To connect DC power to an EX4600 switch: 1. Attach the grounding strap to your bare wrist and to a site ESD point. 2. Verify that the DC power cables are correctly labeled before making connections to the power
supply. In a typical power distribution scheme where the return is connected to chassis ground at the battery plant, you can use a multimeter to verify the resistance of the �48V and RTN DC cables to chassis ground: � The cable with very low resistance (indicating a closed circuit) to chassis ground is positive (+)
and will be installed on the V+ (return) DC power input terminal. � The cable with very high resistance (indicating an open circuit) to chassis ground is negative (�)
and will be installed on the V� (input) DC power input terminal.
CAUTION: You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (�) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the DC power input terminals on each power supply. 3. Ensure that the input circuit breaker is open so that the voltage across the DC power source cable leads is 0 V and that the cable leads do not become active while you are connecting DC power.
NOTE: The V+ terminals are referred to as +RTN, and V� terminals are referred to as �48 V in DC Power Wiring Sequence Warning and DC Power Electrical Safety Guidelines.
4. Ensure that the power supplies are fully inserted in the chassis. 5. Remove the terminal block cover. The terminal block cover is a piece of clear plastic that snaps into
place over the terminal block (see Figure 29 on page 88). 6. Remove the screws on the terminals using the screwdriver. Save the screws.

87
WARNING: Ensure that the power cables do not block access to device components or drape where people can trip on them.
7. Connect each power supply to the power sources. Secure power source cables to the power supplies by screwing the ring lugs attached to the cables to the appropriate terminals by using the screw from the terminals (see Figure 29 on page 88 and Figure 30 on page 89 ). The EX4600 is designed to operate with a DC power supply that has a single, non-redundant, feed input. For source redundancy, two DC power supplies must be installed in EX4600; connect source (A) to one power supply and connect source (B) to the second power supply. This configuration provides the commonly deployed A/B feed redundancy for the system. The terminal block of the power supply has four terminals labeled V+, V+, V�, and V� for connecting DC power source cables labeled positive (+) and negative (�). The V+ terminals are shunted internally together, as are the V- terminals.
CAUTION: The connection between each power source and power supply must include a circuit breaker. Do not connect two sources to a single power supply because doing so can potentially cause circulating current in feed wires whenever there is any difference in the voltage of the two sources.
a. Secure the ring lug of the positive (+) DC power source cable to the V+ terminal on the DC power supply.
b. Secure the ring lug of the negative (�) DC power source cable to the V� terminal on the DC power supply.

88
c. Tighten the screws on the power supply terminals until snug using the screwdriver. Do not overtighten--apply between 5 in-lb (0.56 Nm) and 6 in-lb (0.68 Nm) of torque to the screws.
Figure 29: DC Power Supply Faceplate for an EX4600 Switch

1-- Shunt negative input terminals (-48V) 2-- Shunt positive input terminals (+RTN) 3-- Terminal block 4-- Ejector lever

5-- ESD grounding point 6-- Fault LED 7-- Output LED 8-- Input LED

CAUTION: The V+ terminals are shunted internally together, as are the Vterminals. The same polarity terminal can be wired together from the same source

89 to provide an additional current path in a higher power chassis. Do not connect the terminals to different sources. Figure 30: Securing Ring Lugs to the Terminals on the EX4600 DC Power Supply
8. Replace the terminal block cover. 9. Close the input circuit breaker.
NOTE: The switch powers on as soon as power is provided to the power supply. There is no power switch on the device. 10. Verify that the IN and OUT LEDs on the power supply are lit green and are on steadily. SEE ALSO DC Power Supply in an EX4600 Switch | 36

90
Connecting the EX4600 to Management Devices
IN THIS SECTION Connect a Device to a Network for Out-of-Band Management | 90 Connect a Device to a Management Console Using an RJ-45 Connector | 91 Connecting EX4600 Switches in a Virtual Chassis | 92
Connect a Device to a Network for Out-of-Band Management
Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. Figure 31 on page 90 shows the RJ-45 connector of the Ethernet cable supplied with the device. Figure 31: RJ-45 Connector on an Ethernet Cable
You can monitor and manage these devices by using a dedicated management channel. Each device has a management port to which you can connect an Ethernet cable with an RJ-45 connector. Use the management port to connect the device to the management device. To connect a device to a network for out-of-band management (see Figure 32 on page 91): 1. Connect one end of the Ethernet cable to the management port on the device.

91 2. Connect the other end of the Ethernet cable to the management device. Figure 32: Connect a Device to a Network for Out-of-Band Management
Connect a Device to a Management Console Using an RJ-45 Connector
Ensure that you have an Ethernet cable that has an RJ-45 connector at either end. One such cable and an RJ-45 to DB-9 serial port adapter are supplied with the device. Figure 33 on page 91 shows the RJ-45 connector of the Ethernet cable. Figure 33: RJ-45 Connector on an Ethernet Cable
NOTE: If your laptop or desktop PC does not have a DB-9 plug connector pin and you want to connect your laptop or desktop PC directly to the device, use a combination of the RJ-45 to DB-9 socket adapter supplied with the device and a USB to DB-9 plug adapter. You must provide the USB to DB-9 plug adapter. You can configure and manage devices using a dedicated management channel. Each device has a console port which you can connect to using an Ethernet cable with an RJ-45 connector. Use the

92
console port to connect the device to the console server or management console. The console port accepts a cable that has an RJ-45 connector. To connect the device to a management console (see Figure 34 on page 92 and Figure 35 on page 92): 1. Connect one end of the Ethernet cable to the console port (labeled CON, CONSOLE, or CON1) on
the device. 2. Connect the other end of the Ethernet cable to the console server (see Figure 34 on page 92) or
management console (see Figure 35 on page 92).
Figure 34: Connect a Device to a Management Console Through a Console Server
Figure 35: Connect a Device Directly to a Management Console
Connecting EX4600 Switches in a Virtual Chassis
EX4600 switches can be cabled together to create a Virtual Chassis in a ring topology. Each Virtual Chassis can have up to 10 switches (members) participating in the ring. The Virtual Chassis can be comprised of all EX4600 switches filling the primary Routing Engine (RE), backup RE, and linecard roles. You can also add EX4300 switches to the Virtual Chassis in the primary or backup roles. Virtual Chassis can be installed in a single rack, multiple rack, or in wire closets. You configure an EX4600 Virtual Chassis by configuring the SFP+ or QSFP+ interfaces into Virtual Chassis ports (VCPs). VCPs connect switches together to form a Virtual Chassis, and are responsible for passing all data and control traffic between member switches in the Virtual Chassis. All non-channelized

93 QSFP+ uplink interfaces on standalone EX4600 switches can be configured into VCPs. All fixed SFP+ interfaces on EX4600 can also be configured into VCPs.
BEST PRACTICE: Use the 40-Gigabit interfaces for the VCPs. In a mixed Virtual Chassis of EX4600 and EX4300 switches, the Junos OS release dictates whether the EX4600 is best used in the primary role. For Junos OS releases between 13.2X50-D10 and 14.1X53D25, use the use the EX4300 as a primary and backup RE in the Virtual Chassis. For Junos OS Release 14.1X53-D25 and later, the EX4600 is fully supported as the primary in a mixed Virtual Chassis of EX4600 and EX4300. Ensure all members of the Virtual Chassis are running the same Junos OS Release by issuing the show chassis version CLI command. See for a diagram of how to cable two EX4600 switches and two EX4300 switches into a Virtual Chassis for Junos OS Release 14.1X53-D25 and later. Figure 36: Four Member Virtual Chassis with EX4600 Primary and Backup
Configuring Junos OS on the EX4600
Before you begin connecting and configuring an EX4600 switch, set the following parameter values on the console server or PC:

94
� Baud Rate--9600 � Flow Control--None � Data--8 � Parity--None � Stop Bits--1 � DCD State--Disregard You must perform the initial configuration of the EX4600 switch through the console port using the command-line interface (CLI). To connect and configure the switch from the console: 1. Connect the console port to a laptop or PC using the supplied RJ-45 cable and RJ-45 to DB-9
adapter. The console (CON) port is located on the management panel of the switch. 2. Log in as root. There is no password. If the software booted before you connected to the console
port, you might need to press the Enter key for the prompt to appear.
login: root 3. Start the CLI.
root@% cli 4. Enter configuration mode.
root> configure 5. Add a password to the root administration user account.
[edit] root@# set system root-authentication plain-text-password New password: password Retype new password: password

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6. (Optional) Configure the name of the switch. If the name includes spaces, enclose the name in quotation marks (" ").
[edit] root@# set system host-name host-name 7. Configure the default gateway.
[edit] root@# set routing-options static route default next-hop address 8. Configure the IP address and prefix length for the switch management interface.
[edit] root@# set interfaces em0 unit 0 family inet address address/prefix-length
CAUTION: Although the CLI permits you to configure two management Ethernet interfaces within the same subnet, only one interface is usable and supported.
NOTE: The management ports, em0 (C0) and em1 (C1) are found on the management panel of the EX4600 switch. 9. (Optional) Configure the static routes to remote prefixes with access to the management port.
[edit] root@# set routing-options static route remote-prefix next-hop destination-ip retain no-readvertise 10. Enable telnet service.
[edit] root@# set system services telnet
NOTE: When Telnet is enabled, you cannot log in to the EX4600 switch through Telnet using root credentials. Root login is allowed only for SSH access.

96 11. Commit the configuration to activate it on the switch.
[edit] root@# commit
RELATED DOCUMENTATION Installing and Connecting an EX4600 Switch | 75

98
Maintaining the EX4600 Switch Cooling System
IN THIS SECTION Removing a Fan Module from an EX4600 Switch | 98 Installing a Fan Module in an EX4600 Switch | 99
Removing a Fan Module from an EX4600 Switch
Before you remove a fan module from an EX4600 switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage). Ensure that you have the following parts and tools available to remove a fan module from an EX4600 switch: � ESD grounding strap � Antistatic bag or an antistatic mat The fan modules in an EX4600 switch are hot-removable and hot-insertable field-replaceable units (FRUs): you can remove and replace them without powering off the switch or disrupting switch functions.
CAUTION: Replace a failed fan module with a new fan module within 1 minute of removal to prevent chassis overheating. Before removing the fan module, ensure you have a replacement fan module at hand.
To remove a fan module from an EX4600 switch (see Figure 37 on page 99): 1. Place the antistatic bag or the antistatic mat on a flat, stable surface. 2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis. 3. Using a Phillips screwdriver, loosen the locking screw (3 or 4 turns). 4. Grasp the handle on the fan module and squeeze the outside of the handle to release the module.

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WARNING: To avoid injury, do not touch the fan with your hands or any tools as you slide the fan module out of the chassis--the fan might still be running. 5. Pull firmly to slide the fan module halfway out of the chassis. 6. When the fan stop spinning, slide the fan module completely out of the chassis. 7. Place the fan module in the antistatic bag or on the antistatic mat placed on a flat, stable surface. Figure 37: Removing a Fan Module from an EX4600 Switch
NOTE: When a fan module is removed, the CLI message Fan/Blower is Absent is logged in the system log, and the system raises a minor alarm.
SEE ALSO Cooling System and Airflow in an EX4600 Switch | 22
Installing a Fan Module in an EX4600 Switch
Before you install a fan module in an EX4600 switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage). The fan modules in an EX4600 switch are hot-removable and hot-insertable field-replaceable units (FRUs): you can remove and replace them without powering off the switch or disrupting switch functions.

100
CAUTION: Replace a failed fan module with a new fan module within 1 minute of removal to prevent chassis overheating. Before removing the fan module, ensure you have a replacement fan module at hand.
NOTE: The fan module provides FRU-to-port or port-to-FRU airflow depending on the switch product SKU you purchase. In legacy switches, or switches with an LCD, this airflow is called front to back and back to front.
To install a fan module in an EX4600 switch (see Figure 38 on page 100 ): 1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis. 2. Taking care not to touch the connectors, remove the fan module from its bag. 3. Align the module with the open slot on the management panel of the chassis and slide it in until it is
fully seated.
CAUTION: Damage can occur if you attempt to install a fan module into a chassis with a different airflow direction. Compare the switch product SKU with the airflow marking on the handle to ensure that you are installing a fan module with the same airflow direction as the chassis. The fan modules are designed so that they can only be inserted into the EX4600 switch product SKU that supports the same airflow type. See Cooling System and Airflow in an EX4600 Switch for more information. 4. Using a Phillips screwdriver, turn the locking screw until it is tight.
Figure 38: Installing a Fan Module in an EX4600 Switch

101
Maintaining the EX4600 Switch Power System
IN THIS SECTION Removing a Power Supply from an EX4600 Switch | 101 Installing a Power Supply in an EX4600 Switch | 103
Removing a Power Supply from an EX4600 Switch
Before you remove a power supply from an EX4600 switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage). Ensure that you have the following parts and tools available to remove a power supply from an EX4600 switch: � ESD grounding strap � Antistatic bag or an antistatic mat � Phillips (+) screwdriver, number 2 (DC power supply) The EX4600 is shipped from the factory with two power supplies. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function.
CAUTION: Replace the power supply with a new power supply within 1 minute of removal to prevent chassis overheating.
To remove a power supply from an EX4600 switch (see Figure 39 on page 102): 1. Place the antistatic bag or the antistatic mat on a flat, stable surface. 2. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis.

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NOTE: If only one power supply is installed in your EX4600 switch, you need to power off the switch before removing the power supply. See Powering Off an EX4600 Switch.
3. Disconnect power to the switch: � AC power supply--If the AC power source outlet has a power switch, set it to the OFF (O) position. If the AC power source outlet does not have a power switch, gently pull out the plug end of the power cord connected to the power source outlet.
� DC power supply--Switch the circuit breaker on the panel board that services the DC circuit to the OFF position.
4. Remove the power source cable from the power supply faceplate: � AC power supply--Remove the power cord from the power supply faceplate by detaching the power cord retainer and gently pulling out the socket end of the power cord connected to the power supply faceplate.
� DC power supply--Remove the screws securing the ring lugs attached to the power source cables to the power supply using the screwdriver, and remove the power source cables from the power supply. Replace the screws on the terminals and tighten them.
5. Slide the locking lever toward the handle until it stops. 6. Grasp the power supply handle and pull firmly to slide the power supply halfway out of the chassis. 7. Place one hand under the power supply to support it and slide it completely out of the chassis. Take
care not to touch power supply components, pins, leads, or solder connections. 8. Place the power supply in the antistatic bag or on the antistatic mat placed on a flat, stable surface.
Figure 39: Removing a Power Supply from an EX4600 Switch

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SEE ALSO AC Power Supply in an EX4600 Switch | 30
Installing a Power Supply in an EX4600 Switch
� Before you install a power supply in an EX4600 switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage).
� Ensure that the airflow direction of the power supply is the same as the chassis. Labels on the power supply handle indicate the direction of airflow. See Cooling System and Airflow in an EX4600 Switch for more information.
The EX4600 is shipped from the factory with two power supplies. Each power supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the second power supply is installed and running. You can install replacement power supplies in the two slots next to the fan modules without powering off the switch or disrupting the switching function. To install a power supply in an EX4600 switch (see Figure 40 on page 104): 1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the
chassis. 2. Taking care not to touch power supply components, pins, leads, or solder connections, remove the
power supply from its bag.
CAUTION: Verify that the direction of the arrow on the power supply handle matches the direction of airflow in the chassis. Ensure that each power supply you install in the chassis has the same airflow direction. If you install power supplies with two different airflow directions, Junos OS raises an alarm, and the status (ALM) LED blinks amber.

104 3. Using both hands, place the power supply in the power supply slot on the FRU panel of the switch
and slide it in until it is fully seated and the locking lever slides into place. Figure 40: Installing a Power Supply in an EX4600 Switch
NOTE: Each power supply must be connected to a dedicated power source outlet. To provide power redundancy to the system both power supplies must be installed. Connect power source feed A to one power supply and power source feed B to the second power supply.
CAUTION: Do not connect feed A and feed B to the same power supply input terminal.
NOTE: If you have a Juniper Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note does not apply if you replace existing components with the same type of component.

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Maintaining the Expansion Module in an EX4600 Switch
IN THIS SECTION Removing an Expansion Module from an EX4600 Switch | 105 Installing an Expansion Module in an EX4600 Switch | 106
Removing an Expansion Module from an EX4600 Switch
Before you begin removing an expansion module from the switch: � Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
damage (see Prevention of Electrostatic Discharge Damage). � If there are any transceivers installed in the expansion module, remove them before you remove the
expansion module. For instructions on removing transceivers, see Remove a Transceiver. Ensure that you have the following parts and tools available: � ESD grounding strap � Phillips screwdriver, number 2 � A replacement optional module or cover panel � An antistatic bag or antistatic mat The expansion modules used in EX4600 switches are hot-removable and hot-insertable field-replaceable units (FRUs): You can remove and replace them without powering off the switch or disrupting switch functions.
CAUTION: We recommend that you install either a replacement optional module or a cover panel in the empty module slot to avoid chassis overheating and dust accumulation.
To remove an expansion module from the switch (see Figure 41 on page 106):

106
1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
2. Unscrew both captive screws on the faceplate of the expansion module by using your fingers. If you are unable to unscrew the captive screws by using your fingers, use the screwdriver.
3. Hold the handle and gently pull the expansion module toward you and out of the module slot. 4. Place the expansion module in an antistatic bag or on an antistatic mat placed on a flat, stable
surface. 5. If you are not replacing the expansion module with an optional module, install the cover panel over
the slot.
NOTE: After you have removed an expansion module, wait for at least 5 seconds before you install an expansion module. If you do not wait for at least 5 seconds, the interfaces on the expansion module might not come up.
Figure 41 on page 106 shows removing a QFX-EM-4Q expansion module from the port panel of a EX4600 switch.
Figure 41: Removing a QFX-EM-4Q Expansion Module from an EX4600 Switch
Installing an Expansion Module in an EX4600 Switch
Before you begin installing an expansion module in the switch, ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage (see Prevention of Electrostatic Discharge Damage). Ensure that you have the following parts and tools available:

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� ESD grounding strap. If a grounding strap is not available, follow the alternative grounding method described in Step 1 of the following procedure.
� Phillips (+) screwdriver, number 2
The EX4600 switch allows up to two expansion modules to be added to the port panel to increase port density. The EX4600 switch holds two bays of expansion modules that can be mixed and matched as desired. The supported modules are:
� QFX-EM-4Q�Each module adds four Quad Enhanced Small Form-Factor Pluggable (QSFP+) ports
� EX4600-EM-8F�Each module adds eight 10 Gigabit RJ-45 ports
The EX4600 is configured for the QFX-EM-4Q by default, but any combination of the two modules is supported. Expansion modules can be hot-inserted or hot-removed. However, when an EX4600-EM-8F is inserted instead of the default QFX-EM-4Q, the PFE reboots and all of the interfaces on the switch and expansion module temporarily go down. Likewise when an EX4600-EM-8F is running on the EX4600 and it is swapped with a QFX-EM-4Q, all of the interfaces temporarily go down, which can cause a short disruption in traffic.
NOTE: When an expansion module is installed in the switch or an existing expansion module is replaced with another expansion module, the switch detects the ports on the expansion module. The switch creates the required interfaces when transceivers are installed in these ports.
To install an expansion module in an EX4600 switch (see Figure 42 on page 108):
1. Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis. If a grounding strap is not available, hold the expansion module in its antistatic bag in one hand and touch the exposed metallic part of the switch with the other hand to ground yourself and the component.
2. If the module slot has a cover panel on it, remove the cover panel by using the screwdriver and save it for later use.
3. Taking care not to touch module components, pins, leads, or solder connections, remove the expansion module from its bag.
4. Loosen the captive screws on the front faceplate of the expansion module by using your fingers. If you are unable to loosen the captive screws by using your fingers, use the screwdriver.
5. Using both hands, place the expansion module in the empty slot and slide it in gently until it is fully seated.

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NOTE: After you have removed an expansion module, wait for at least 5 seconds before you install an expansion module. If you do not wait for at least 5 seconds, the interfaces on the expansion module might not come up. 6. Raise the handle and tighten the captive screws by using your fingers or the screwdriver. When the ST LED turns green, the expansion module is ready for use. Figure 42 on page 108 shows how to install a QSFP+ expansion module on the port panel of a EX4600 switch. Figure 42: Installing a QFX4Q Expansion Module in an EX4600 Switch
NOTE: If you have a Juniper Care service contract, register any addition, change, or upgrade of hardware components at https://www.juniper.net/customers/support/tools/updateinstallbase/ . Failure to do so can result in significant delays if you need replacement parts. This note applies if you change the type of power supply or add a new type of expansion module. It does not apply if you replace these components with the same type of component.

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Maintain Transceivers
IN THIS SECTION Remove a Transceiver | 109 Remove a QSFP28 Transceiver | 111 Install a Transceiver | 113 Install a QSFP28 Transceiver | 116
Remove a Transceiver
Before you remove a transceiver from a device, ensure that you have taken the necessary precautions for the safe handling of lasers (see Laser and LED Safety Guidelines and Warnings). Ensure that you have the following parts and tools available: � An antistatic bag or an antistatic mat � Rubber safety caps to cover the transceiver and fiber-optic cable connector � A dust cover to cover the port or a replacement transceiver The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs): You can remove and replace them without powering off the device or disrupting device functions.
NOTE: After you remove a transceiver or when you change the media-type configuration, wait for 6 seconds for the interface to display the operational commands.
Figure 43 on page 111 shows how to remove a QSFP+ transceiver. The procedure is the same for all types of transceivers except the QSFP28 and CFP transceivers. To remove a transceiver from a device: 1. Place the antistatic bag or antistatic mat on a flat, stable surface. 2. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end
of the strap to the ESD point on the switch.

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3. Label the cable connected to the transceiver so that you can reconnect it correctly.
LASER WARNING: Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to transceivers emit laser light that can damage your eyes.
LASER WARNING: Do not leave a fiber-optic transceiver uncovered except when inserting or removing a cable. The rubber safety cap keeps the port clean and prevents accidental exposure to laser light.
CAUTION: Do not bend fiber-optic cables beyond their minimum bend radius. An arc smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose. 4. Remove the cable connected to the transceiver (see Disconnect a Fiber-Optic Cable). Cover the transceiver and the end of each fiber-optic cable connector with a rubber safety cap immediately after disconnecting the fiber-optic cables. 5. If there is a cable management system, arrange the cable in the cable management system to prevent it from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.
CAUTION: Do not bend the fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose. 6. To remove an SFP, SFP+, XFP, or a QSFP+ transceiver: a. By using your fingers, pull open the ejector lever on the transceiver to unlock the transceiver.
CAUTION: Before removing the transceiver, make sure that you open the ejector lever completely until you hear it click. This prevents damage to the transceiver.
b. Grasp the transceiver ejector lever and gently slide the transceiver approximately 0.5 in. (1.3 cm) straight out of the port.

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CAUTION: To prevent ESD damage to the transceiver, do not touch the connector pins at the end of the transceiver.
Figure 43: Remove a QSFP+ Transceiver
1-- Ejector lever To remove a CFP transceiver: a. Loosen the screws on the transceiver by using your fingers. b. Grasp the screws on the transceiver and gently slide the transceiver approximately 0.5 in. (1.3 cm)
straight out of the port.
CAUTION: To prevent ESD damage to the transceiver, do not touch the connector pins at the end of the transceiver. 7. By using your fingers, grasp the body of the transceiver and pull it straight out of the port. 8. Place the transceiver in the antistatic bag or on the antistatic mat placed on a flat, stable surface. 9. Place the dust cover over the empty port or install the replacement transceiver.
Remove a QSFP28 Transceiver
Before you remove a transceiver from a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings). Ensure that you have the following parts and tools available: � An antistatic bag or an antistatic mat

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� Rubber safety caps to cover the transceiver and fiber-optic cable connector � A dust cover to cover the port or a replacement transceiver The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs). You can remove and replace them without powering off the device or disrupting the device functions.
NOTE: After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
NOTE: We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.
To remove a QSFP28 transceiver (see Figure 44 on page 113): 1. Place an antistatic bag or antistatic mat on a flat, stable surface to receive the QSFP28 transceiver.
Have a rubber safety cap ready for the QSFP28 transceiver and the cable. 2. Wrap and fasten one end of an ESD wrist strap around your bare wrist, and connect the other end of
the strap to the ESD point on the switch. 3. Label the cable connected to the QSFP28 transceiver so that you can later reconnect it to the correct
QSFP28 transceiver. 4. Disconnect the cable from the transceiver. Immediately cover the transceiver and the end of the
cable with a rubber safety cap.
CAUTION: Do not leave a fiber-optic transceiver uncovered except when inserting or removing a cable. The safety cap keeps the port clean and prevents accidental exposure to laser light. 5. If there is a cable management system, arrange the cable in the cable management system to prevent it from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.

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CAUTION: Do not bend the fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.
Figure 44: Remove a QSFP28 Transceiver
6. Pull the ejector tab straight back. The locking pins on the transceiver automatically release the transceiver.
7. Place the transceiver on the antistatic mat or in the antistatic bag. 8. Place the dust cover over the empty port or install the replacement transceiver.
Install a Transceiver
Before you install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings). Ensure that you have a rubber safety cap available to cover the transceiver. The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs): You can remove and replace them without powering off the device or disrupting the device functions.
NOTE: After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
NOTE: We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.

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CAUTION: If you face a problem running a Juniper Networks device that uses a thirdparty optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device.
Figure 45 on page 116 shows how to install a QSFP+ transceiver. The procedure is the same for all types of transceivers except the QSFP28 and CFP transceivers. To install a transceiver:
CAUTION: To prevent electrostatic discharge (ESD) damage to the transceiver, do not touch the connector pins at the end of the transceiver.
1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch.
2. Remove the transceiver from its bag. 3. Check to see whether the transceiver is covered with a rubber safety cap. If it is not, cover the
transceiver with a rubber safety cap.
LASER WARNING: Do not leave a fiber-optic transceiver uncovered except when inserting or removing a cable. The rubber safety cap keeps the port clean and prevents accidental exposure to laser light. 4. If the port in which you want to install the transceiver is covered with a dust cover, remove the dust cover and save it in case you need to cover the port later. If you are hot-swapping a transceiver, wait for at least 10 seconds after removing the transceiver from the port before installing a new transceiver. 5. Using both hands, carefully place the transceiver in the empty port. The connectors must face the chassis.
CAUTION: Before you slide the transceiver into the port, ensure that the transceiver is aligned correctly. Misalignment might cause the pins to bend, making the transceiver unusable. 6. Slide the transceiver in gently until it is fully seated. If you are installing a CFP transceiver, tighten the captive screws on the transceiver by using your fingers.

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7. Remove the rubber safety cap from the transceiver and the end of the cable, and insert the cable into the transceiver.
LASER WARNING: Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.
CAUTION: Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light. 8. If there is a cable management system, arrange the cable in the cable management system to prevent the cable from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.
CAUTION: Do not let fiber-optic cable hang free from the connector. Do not allow fastened loops of cable to dangle, which stresses the cable at the fastening point.

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CAUTION: Avoid bending fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.
Figure 45: Install a Transceiver
1-- Ejector lever
Install a QSFP28 Transceiver
Before you install a transceiver in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings). Ensure that you have a rubber safety cap available to cover the transceiver. The transceivers for Juniper Networks devices are hot-removable and hot-insertable field-replaceable units (FRUs): You can remove and replace them without powering off the device or disrupting the device functions.
NOTE: After you insert a transceiver or after you change the media-type configuration, wait for 6 seconds for the interface to display operational commands.
NOTE: We recommend that you use only optical transceivers and optical connectors purchased from Juniper Networks with your Juniper Networks device.

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CAUTION: If you face a problem running a Juniper Networks device that uses a thirdparty optic or cable, the Juniper Networks Technical Assistance Center (JTAC) can help you diagnose the source of the problem. Your JTAC engineer might recommend that you check the third-party optic or cable and potentially replace it with an equivalent Juniper Networks optic or cable that is qualified for the device. To install a QSFP28 transceiver (see Figure 46 on page 117): 1. Wrap and fasten one end of the ESD wrist strap around your bare wrist, and connect the other end of the strap to the ESD point on the switch. 2. Verify that a rubber safety cap covers the QSFP28 transceiver. 3. Orient the transceiver in front of the port so that the QSFP28 connector faces the appropriate direction.
Figure 46: Install a QSFP28 Transceiver
4. Slide the transceiver into the slot until the locking pins lock in place. If there is resistance, remove the transceiver and flip it so that the connector faces the other direction.
5. Remove the rubber safety cap from the transceiver and the end of the cable, and insert the cable into the transceiver.
LASER WARNING: Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.
CAUTION: Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

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6. If there is a cable management system, arrange the cable in the cable management system to prevent the cable from dislodging or developing stress points. Secure the cable so that it does not support its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.
CAUTION: Do not let fiber-optic cable hang free from the connector. Do not allow fastened loops of cable to dangle, which stresses the cable at the fastening point.
CAUTION: Avoid bending fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.
Maintain Fiber-Optic Cables
IN THIS SECTION Connect a Fiber-Optic Cable | 118 Disconnect a Fiber-Optic Cable | 119 How to Handle Fiber-Optic Cables | 120
Connect a Fiber-Optic Cable
Before you connect a fiber-optic cable to an optical transceiver installed in a device, ensure that you have taken the necessary precautions for safe handling of lasers (see Laser and LED Safety Guidelines and Warnings). To connect a fiber-optic cable to an optical transceiver installed in a device:

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LASER WARNING: Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to transceivers emit laser light that can damage your eyes.
1. If the fiber-optic cable connector is covered with a rubber safety cap, remove the cap. Save the cap. 2. Remove the rubber safety cap from the optical transceiver. Save the cap. 3. Insert the cable connector into the optical transceiver (see Figure 47 on page 119).

Figure 47: Connect a Fiber-Optic Cable to an Optical Transceiver Installed in a Device

Fiber-optic cable

Transceiver

g000704

4. Secure the cables so that they do not support their own weight. Place excess cable out of the way in a neatly coiled loop. Placing fasteners on a loop helps cables maintain their shape.
CAUTION: Do not bend fiber-optic cables beyond their minimum bend radius. An arc smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose. Do not let fiber-optic cables hang free from the connector. Do not allow fastened loops of cables to dangle, which stresses the cables at the fastening point.
Disconnect a Fiber-Optic Cable
Before you disconnect a fiber-optic cable from an optical transceiver, ensure that you have taken the necessary precautions for safe handling of lasers. See Laser and LED Safety Guidelines and Warnings. Ensure that you have the following parts and tools available: � A rubber safety cap to cover the transceiver � A rubber safety cap to cover the fiber-optic cable connector Juniper Networks devices have optical transceivers to which you can connect fiber-optic cables.

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To disconnect a fiber-optic cable from an optical transceiver installed in the device: 1. Disable the port in which the transceiver is installed by issuing the following command:
[edit interfaces] user@device# set interface-name disable
LASER WARNING: Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables connected to transceivers emit laser light that can damage your eyes. 2. Carefully unplug the fiber-optic cable connector from the transceiver. 3. Cover the transceiver with a rubber safety cap.
LASER WARNING: Do not leave a fiber-optic transceiver uncovered except when inserting or removing a cable. The rubber safety cap keeps the port clean and prevents accidental exposure to laser light. 4. Cover the fiber-optic cable connector with the rubber safety cap.
How to Handle Fiber-Optic Cables
Fiber-optic cables connect to optical transceivers that are installed in Juniper Networks devices. To maintain fiber-optic cables: � When you unplug a fiber-optic cable from a transceiver, place rubber safety caps over the transceiver
and on the end of the cable. � Anchor fiber-optic cables to prevent stress on the connectors. When attaching a fiber-optic cable to
a transceiver, be sure to secure the fiber-optic cable so that it does not support its own weight as it hangs to the floor. Never let a fiber-optic cable hang free from the connector. � Avoid bending fiber-optic cables beyond their minimum bend radius. Bending fiber-optic cables into arcs smaller than a few inches in diameter can damage the cables and cause problems that are difficult to diagnose. � Frequent plugging and unplugging of fiber-optic cables in and out of optical instruments can damage the instruments, which are expensive to repair. Attach a short fiber extension to the optical

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equipment. Any wear and tear due to frequent plugging and unplugging is then absorbed by the short fiber extension, which is easier and less expensive to replace than the instruments. � Keep fiber-optic cable connections clean. Microdeposits of oil and dust in the canal of the transceiver or cable connector can cause loss of light, reduction in signal power, and possibly intermittent problems with the optical connection. � To clean the transceiver canal, use an appropriate fiber-cleaning device such as RIFOCS Fiber
Optic Adaptor Cleaning Wands (part number 946). Follow the instructions in the cleaning kit you use. � After cleaning the transceiver, make sure that the connector tip of the fiber-optic cable is clean. Use only an approved alcohol-free fiber-optic cable cleaning kit such as the Opptex CletopS�Fiber Cleaner. Follow the instructions in the cleaning kit you use.
Removing the EX4600 Switch
IN THIS SECTION Installing and Removing EX4600 Switch Hardware Components | 121 Powering Off an EX4600 Switch | 122 Removing an EX4600 Switch from a Rack or Cabinet | 125
Installing and Removing EX4600 Switch Hardware Components
The EX4600 switch chassis is a rigid sheet-metal structure that houses the hardware components. The field-replaceable units (FRUs) in EX4600 switches are: � Power supply � Fan module � Expansion modules � SFP+ transceiver � QSFP+ transceiver

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All of the EX4600 switch FRUs are hot-insertable and hot-removable: you can remove and replace them without powering off the switch or disrupting switch functions.
CAUTION: Replace a failed power supply with a new power supply within 1 minute of removal to prevent chassis overheating. Replace a failed fan module with a new fan within 1 minute of removal to prevent chassis overheating.
To install a power supply in a EX4600 switch, follow the instructions in Installing a Power Supply in an EX4600 Switch. To remove a power supply from a EX4600 switch, follow the instructions in Removing a Power Supply from an EX4600 Switch. To install a fan module in a EX4600 switch, follow the instructions in Installing a Fan Module in an EX4600 Switch. To remove a fan module from a EX4600 switch, follow the instructions in Removing a Fan Module from an EX4600 Switch. To install an SFP+ or QSFP+ transceiver in an EX4600 switch, follow the instructions in Install a Transceiver. To remove an SFP+ or QSFP+ transceiver from an EX4600 switch, follow the instructions in Remove a Transceiver. To connect a fiber-optic cable to an SFP+ or QSFP+ transceiver in an EX4600 switch, follow the instructions in Connect a Fiber-Optic Cable. To disconnect a fiber-optic cable from an SFP+ or QSFP+ transceiver from an EX4600 switch, follow the instructions in Disconnect a Fiber-Optic Cable.
Powering Off an EX4600 Switch
Before you power off an EX4600 switch: � Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
damage. See Prevention of Electrostatic Discharge Damage. � Ensure that you do not need to forward traffic through the switch. Ensure that you have the following parts and tools available to power off the switch: � An ESD grounding strap � An external management device such as a PC � An RJ-45 to DB-9 rollover cable to connect the external management device to the console port To power off an EX4600 switch: 1. Connect to the switch using one of the following methods:

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� Connect a management device to the console (CON) port on a EX4600 switch. For instructions about connecting a management device to the console (CON) port, see Connect a Device to a Management Console Using an RJ-45 Connector.
� You can shut down the EX4600 switch from a management device on your out-of-band management network. For instructions about connecting a management device to the management (CO or C1) port, see Connecting an EX4600 Switch to a Network for Out-of-Band Management.
2. Shut down Junos OS from the external management device by issuing the request system halt operational mode CLI command. This command shuts down the switch gracefully and preserves system state information. A message appears on the console, confirming that the operating system has halted. You see the following output (or something similar, depending on the hardware being shut down) after entering the command:
Shutdown NOW! System going down IMMEDIATELY
Terminated Poweroff for hypervisor to respawn Oct 25 10:35:05 init: event-processing (PID 1114) exited with status=1 Oct 25 10:35:05 init: packet-forwarding-engine (PID 1424) exited with status=8 . Waiting (max 60 seconds) for system process `vnlru_mem' to stop...done Waiting (max 60 seconds) for system process `vnlru' to stop...done Waiting (max 60 seconds) for system process `bufdaemon' to stop...done Waiting (max 60 seconds) for system process `syncer' to stop... Syncing disks, vnodes remaining...0 0 0 0 done
syncing disks... All buffers synced. Uptime: 11h0m30s Normal shutdown (no dump device defined) unloading fpga driver unloading fx-scpld Powering system off using ACPI kvm: 28646: cpu0 disabled perfctr wrmsr: 0xc1 data 0xabcd pci-stub 0000:01:00.2: transaction is not cleared; proceeding with reset anyway pci-stub 0000:01:00.1: transaction is not cleared; proceeding with reset anyway hub 1-1:1.0: over-current change on port 1

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Stopping crond: [ OK ] Stopping libvirtd daemon: [ OK ] Shutting down ntpd: [ OK ] Shutting down system logger: [ OK ] Shutting down sntpc: [ OK ] Stopping sshd: [ OK ] Stopping vehostd: [ OK ] Stopping watchdog: [ OK ] Stopping xinetd: [ OK ] Sending all processes the TERM signal... [ OK ] Sending all processes the KILL signal... [ OK ] Saving random seed: [ OK ] Syncing hardware clock to system time [ OK ] Turning off swap: [ OK ] Unmounting file systems: [ OK ] init: Re-executing /sbin/init Halting system... System halted.
CAUTION: The final output of any version of the request system halt command is the "The operating system has halted." Wait at least 60 seconds after first seeing this message before following the instructions in Step "4" on page 124 and Step "5" on page 124 to power off the switch.
3. Attach the grounding strap to your bare wrist and to a site ESD point. 4. Disconnect power to the switch by performing one of the following tasks:
� AC power supply--If the AC power source outlet has a power switch, set it to the OFF (O) position. If the AC power source outlet does not have a power switch, gently pull out the plug end of the power cord connected to the power source outlet.
� DC power supply--Switch the circuit breaker on the panel board that services the DC circuit to the OFF position.
5. Remove the power source cable from the power supply faceplate: � AC power supply--Remove the power cord from the power supply faceplate by detaching the power cord retainer and gently pulling out the socket end of the power cord connected to the power supply faceplate.
� DC power supply--Remove the screws securing the ring lugs attached to the power source cables to the power supply using the screwdriver, and remove the power source cables from the power supply. Replace the screws on the terminals and tighten them.

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6. Uncable the switch before removing it from the rack or cabinet.
Removing an EX4600 Switch from a Rack or Cabinet
Before removing an EX4600 switch from a rack: Ensure that you have the following parts and tools available: � A Phillips (+) screwdriver, number 2 or number 3, depending on the size of your rack mounting
screws, for mounting the EX4600 switch on the rack. If you need to relocate an installed EX4600 switch, use the procedure described in this topic. (The remainder of this topic uses "rack" to mean "rack or cabinet." )
NOTE: When you remove multiple devices from a rack, remove the device in the top of the rack first and proceed to remove the rest of the devices from top to bottom.
� Ensure that the rack is stable and secured to the building. � Ensure that there is enough space to place the removed EX4600 switch in its new location and along
the path to the new location. � Read General Safety Guidelines and Warnings. � Ensure that the EX4600 switch has been safely powered off (see Powering Off an EX4600 Switch)
and that you have unplugged (disconnected) the power cords. � Ensure that you have disconnected any cables or wires attached to the EX4600 switch ports. To remove a EX4600 switch from a rack or cabinet: 1. Have one person support the weight of the switch while another person uses the screwdriver to
remove the front mounting screws that attach the chassis mounting brackets to the rack or cabinet. 2. Remove the EX4600 switch from the rack or cabinet. 3. Use the screwdriver to remove the mounting screws that attach the mounting blades attached to the
rear of the rack or cabinet. 4. Place the removed screws and mounting blades in a labeled bag. You will need them when you
reinstall the chassis. 5. Transport the EX4600 switch to your desired new location.

5 CHAPTER
Troubleshooting Hardware
Troubleshooting the EX4600 Components | 127

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Troubleshooting the EX4600 Components
IN THIS SECTION Understand Alarm Types and Severity Levels on EX Series Switches | 127 Interface Alarm Messages | 129 Creating an Emergency Boot Device | 129 Performing a Recovery Installation | 131

Understand Alarm Types and Severity Levels on EX Series Switches

NOTE: This topic applies only to the J-Web Application package.

Alarms alert you to conditions that might prevent normal operation of the switch. Before monitoring alarms on a Juniper Networks EX Series Ethernet switch, become familiar with the terms defined in Table 31 on page 127.
Table 31: Alarm Terms

Term

Definition

alarm

Signal alerting you to conditions that might prevent normal operation. On a switch, the alarm signal is the ALM LED lit on the front of the chassis.

alarm condition

Failure event that triggers an alarm.

alarm severity

Seriousness of the alarm. If the Alarm (ALM) LED is red, this indicates a major alarm. If the Alarm LED is yellow or amber, this indicates a minor alarm. If the Alarm LED is unlit, there is no alarm or the switch is halted.

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Table 31: Alarm Terms (Continued)

Term

Definition

chassis alarm

Preset alarm triggered by a physical condition on the switch such as a power supply failure, excessive component temperature, or media failure.

system alarm

Preset alarm triggered by a missing rescue configuration or failure to install a license for a licensed software feature.
NOTE: On EX6200 switches, a system alarm can be triggered by an internal link error.

Alarm Types
The switch supports these alarms:
� Chassis alarms indicate a failure on the switch or one of its components. Chassis alarms are preset and cannot be modified.
� System alarms indicate a missing rescue configuration. System alarms are preset and cannot be modified, although you can configure them to appear automatically in the J-Web interface display or the CLI display.
Alarm Severity Levels
Alarms on switches have two severity levels:
� Major (red)--Indicates a critical situation on the switch that has resulted from one of the following conditions. A red alarm condition requires immediate action.
� One or more hardware components have failed.
� One or more hardware components have exceeded temperature thresholds.
� An alarm condition configured on an interface has triggered a critical warning.
� Minor (yellow or amber)--Indicates a noncritical condition on the switch that, if left unchecked, might cause an interruption in service or degradation in performance. A yellow or amber alarm condition requires monitoring or maintenance.
A missing rescue configuration generates a yellow or amber system alarm.

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SEE ALSO Dashboard for EX Series Switches
Interface Alarm Messages
Interface alarms are alarms that you configure to alert you when an interface is down. To configure an interface link-down condition to trigger a red or yellow alarm, or to configure the linkdown condition to be ignored, use the alarm statement at the [edit chassis] hierarchy level. You can specify the ethernet, fibre-channel, or management-ethernet interface type.
NOTE: Fibre Channel alarms are valid only on QFX3500 devices.
NOTE: When red alarms or major alarms are issued on QFX5100 or EX4600 switches, the alarm LED glows amber instead of red.
By default, major alarms are configured for interface link-down conditions on the control plane and management network interfaces in a QFabric system. The link-down alarms indicate that connectivity to the control plane network is down. You can configure these alarms to be ignored using the alarm statement at the [edit chassis] hierarchy level.
NOTE: If you configure a yellow alarm on the QFX3008-I Interconnect device, it is handled as a red alarm.
Creating an Emergency Boot Device
Before you begin, you need to download the installation media image for your device and Junos OS release from https://www.juniper.net/customers/support/ . If Junos OS on the device is damaged in some way that prevents the software from loading properly, you can use an emergency boot device to repartition the primary disk and load a fresh installation of Junos OS. Use the following procedure to create an emergency boot device.

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NOTE: In the following procedure, we assume that you are creating the emergency boot device on a switch. You can create the emergency boot device on another Juniper Networks switch or router, or any PC or laptop that supports Linux. The steps you take to create the emergency boot device vary, depending on the device.
To create an emergency boot device: 1. Use FTP to copy the installation media image into the /var/tmp directory on the device. 2. Insert a USB device into the USB port. 3. From the Junos OS command-line interface (CLI), start the shell:
user@device> start shell % 4. Switch to the root account using the su command:
% su Password: password
NOTE: The password is the root password for the device. If you logged in to the device as root, you do not need to perform this step.
5. Enter the following command on the device:
root@device% dd if=/var/tmp/filename of=/dev/da0 bs=1048576 The device writes the installation media image to the USB device:
root@device% dd if=/var/tmp/install-media-host-usb-ex-4e-flexx86-64-18.3R1.10-secure.img 11006+1 records in 11006+1 records out 180332544 bytes transferred in 71.764266 secs (2512846 bytes/sec)

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6. Log out of the shell:
root@device% exit % exit user@device>
Performing a Recovery Installation
If Junos OS on your device is damaged in some way that prevents the software from loading correctly, you may need to perform a recovery installation using an emergency boot device (for example, a USB flash drive) to restore the default factory installation. Once you have recovered the software, you need to restore the device configuration. You can either create a new configuration as you did when the device was shipped from the factory, or if you saved the previous configuration, you can simply restore that file to the device. If at all possible, you should try to perform the following steps before you perform the recovery installation: 1. Ensure that you have an emergency boot device to use during the installation. See Creating an
Emergency Boot Device for information on how to create an emergency boot device. 2. Copy the existing configuration in the file /config/juniper.conf.gz from the device to a remote
system, such as a server, or to an emergency boot device. For extra safety, you can also copy the backup configurations (the files named /config/juniper.conf.n, where n is a number from 0 through 9) to a remote system or to an emergency boot device.
WARNING: The recovery installation process completely overwrites the entire contents of the internal flash storage.
3. Copy any other stored files to a remote system as desired. To reinstall Junos OS: 1. Insert the emergency boot device into the device. 2. Power cycle the device.
The emergency boot device (external USB install media) is detected. At this time, you can load the Junos OS from the emergency boot device onto the internal flash storage.

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3. The software prompts you with the following options:
Junos Snapshot Installer - (c) Juniper Networks 2013 Reboot Install Junos Snapshot [13.2-20131115_x_132_x51_vjunos.0Boot to host shell [debug]
4. Select Install Junos to format the internal flash storage and install the Junos OS on the emergency boot device onto the internal flash storage.
5. The device copies the software from the emergency boot device, occasionally displaying status messages. Copying the software can take up to 12 minutes. When the software is finished being copied from the emergency device to the device, the device then reboots from the internal flash storage on which the software was just installed. When the reboot is complete, the device displays the Junos OS login prompt:
root@device#
6. Create a new configuration as you did when the switch was shipped from the factory, or restore the previously saved configuration file to the device.
7. Remove the emergency boot device.

6 CHAPTER
Contacting Customer Support and Returning the Chassis or Components
Returning an EX4600 Chassis or Components | 134

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Returning an EX4600 Chassis or Components
IN THIS SECTION Returning an EX4600 Switch or Component for Repair or Replacement | 134 Locating the Serial Number on an EX4600 Switch or Component | 135 Contact Customer Support to Obtain Return Material Authorization | 138 Packing an EX4600 Switch or Component for Shipping | 139
Returning an EX4600 Switch or Component for Repair or Replacement
If you need to return an EX4600 switch or component to Juniper Networks for repair or replacement, follow this procedure: 1. Determine the serial number of the component. For instructions, see Locating the Serial Number on
an EX4600 Switch or Component. 2. Obtain a Return Materials Authorization (RMA) number from the Juniper Technical Assistance Center
(JTAC) as described in Contact Customer Support to Obtain Return Material Authorization.
NOTE: Do not return any component to Juniper Networks unless you have first obtained an RMA number. Juniper Networks reserves the right to refuse shipments that do not have an RMA. Refused shipments are returned to the customer through collect freight.
3. Pack the switch or component for shipping as described in Packing an EX4600 Switch or Component for Shipping.
For more information about return and repair policies, see the customer support page at https:// www.juniper.net/support/guidelines.html .

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Locating the Serial Number on an EX4600 Switch or Component
IN THIS SECTION Listing the Chassis and Component Details Using the CLI | 135 Locating the Chassis Serial Number ID Label on an EX4600 Switch | 137 Locating the Serial Number ID Labels on FRU Components | 137

If you are returning a switch or component to Juniper Networks for repair or replacement, you must locate the serial number of the switch or component. You must provide the serial number to the Juniper Networks Technical Assistance Center (JTAC) when you contact them to obtain a Return Materials Authorization (RMA). See Contact Customer Support to Obtain Return Material Authorization.
If the switch is operational and you can access the command-line interface (CLI), you can list serial numbers for the switch and for some components with a CLI command. If you do not have access to the CLI or if the serial number for the component does not appear in the command output, you can locate the serial number ID label on the switch or component.
NOTE: If you want to find the serial number ID label on a component, you need to remove the component from the switch chassis, for which you must have the required parts and tools available.

Listing the Chassis and Component Details Using the CLI
To list the EX4600 switch and components and their serial numbers, use the show chassis hardware CLI operational mode command.

user@device> show chassis hardware

{master:0}

root@RIDGE_IEEE> show chassis hardware

Hardware inventory:

Item

Version Part number Serial number

Chassis

TC3113520021

Pseudo CB 0

Routing Engine 0

BUILTIN

FPC 0

REV 11 650-049940 TC3113520021

Description EX4600-40F
EX4600-40F EX4600-40F

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CPU

BUILTIN

PIC 0

BUILTIN

Xcvr 2

REV 01 740-011614

Xcvr 12

REV 01 740-038152

Xcvr 13

REV 01 740-038152

Xcvr 14

REV 01 740-038152

Xcvr 15

REV 01 740-038152

Xcvr 20

REV 01 740-038153

Xcvr 21

REV 01 740-038153

Xcvr 22

REV 01 740-038153

Xcvr 23

REV 01 740-038153

Xcvr 24

REV 01 740-038153

PIC 1

REV 02 611-049556

PIC 2

REV 02 611-049555

Xcvr 0

REV 01 740-038152

Power Supply 1 REV 03 740-041741

Fan Tray 0

Front to Back Airflow - AFO

Fan Tray 1

Front to Back Airflow - AFO

Fan Tray 2

Front to Back Airflow - AFO

Fan Tray 3

Front to Back Airflow - AFO

Fan Tray 4

Front to Back Airflow - AFO

BUILTIN BUILTIN C09K04908 MOC12301520030 MOC12301520030 MOC12301520030 MOC12301520030 MOC13461530030 MOC13461530030 MOC13461530030 MOC13461530030 MOC13461530030 RS3113520027 RR3113310086 MOC12301520030 1GA23381854

FPC CPU 24x10G-4x40G SFP-LX10 SFP+-10G-CU1M SFP+-10G-CU1M SFP+-10G-CU1M SFP+-10G-CU1M SFP+-10G-CU3M SFP+-10G-CU3M SFP+-10G-CU3M SFP+-10G-CU3M QSFP+-40G-CU3M EX4600-EM-8F QFX-EM-4Q QSFP+-40G-CU1M JPSU-650W-AC-AFO QFX5100 Fan Tray 0,
QFX5100 Fan Tray 1,
QFX5100 Fan Tray 2,
QFX5100 Fan Tray 3,
QFX5100 Fan Tray 4,

{master:0} root@RIDGE_IEEE>

root@RIDGE_IEEE> show version fpc0:

NOTE: The EX4600 and QFX5100 use the same fan modules. These modules are represented in CLI output as QFX5100 fan trays.

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NOTE: You must remove the fan module to read the fan serial number from the serial number ID label. The fan module serial number cannot be viewed through the CLI. Fan Tray 2 refers to the third module from the left, counting from 0.
Locating the Chassis Serial Number ID Label on an EX4600 Switch
The location for the chassis serial number ID label is found to the right of the 40 Gigabit Ethernet ports. See Figure 48 on page 137 for an example of where to find the serial number ID on the EX4600 switch. Figure 48: Location of the Serial Number ID Label on an EX4600 Switch
Locating the Serial Number ID Labels on FRU Components
The power supplies, fan module, and expansion modules installed in EX4600 switches are fieldreplaceable units (FRUs). For each FRU, you must remove the FRU from the switch chassis to see the FRU serial number ID label. � AC power supply--The serial number ID label is on the top of the AC power supply. � Fan module--The serial number ID label is on the top of the fan module. � Expansion module�The serial number ID label is in the middle of the printed circuit board (PCB).

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Contact Customer Support to Obtain Return Material Authorization
If you are returning a device or hardware component to Juniper Networks for repair or replacement, obtain a Return Material Authorization (RMA) number from Juniper Networks Technical Assistance Center (JTAC). After locating the serial number of the device or hardware component you want to return, open a service request with Juniper Networks Technical Assistance Center (JTAC) on the Web or by telephone. Before you request an RMA number from JTAC, be prepared to provide the following information: � Your existing service request number, if you have one � Serial number of the component � Your name, organization name, telephone number, fax number, and shipping address � Details of the failure or problem � Type of activity being performed on the device when the problem occurred � Configuration data displayed by one or more show commands You can contact JTAC 24 hours a day, seven days a week on the Web or by telephone: � Service Request Manager: https://support.juniper.net/support � Telephone: +1-888-314-JTAC (+1-888-314-5822), toll free in U.S., Canada, and Mexico
NOTE: For international or direct-dial options in countries without toll free numbers, see https:// support.juniper.net/support
If you are contacting JTAC by telephone, enter your 12-digit service request number followed by the pound (#) key for an existing case, or press the star (*) key to be routed to the next available support engineer. The support representative validates your request and issues an RMA number for return of the component.

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Packing an EX4600 Switch or Component for Shipping
IN THIS SECTION Packing an EX4600 Switch for Shipping | 139 Packing EX4600 Switch Components for Shipping | 140
If you are returning an EX4600 switch or component to Juniper Networks for repair or replacement, pack the item as described in this topic. Before you pack an EX4600 switch or component: � Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD)
damage. See Prevention of Electrostatic Discharge Damage. � Retrieve the original shipping carton and packing materials. Contact your JTAC representative if you
do not have these materials, to learn about approved packing materials. See Contact Customer Support to Obtain Return Material Authorization. Ensure that you have the following parts and tools available: � ESD grounding strap. � Antistatic bag, one for each component. � If you are returning the chassis, an appropriate screwdriver for the mounting screws used on your rack or cabinet.
Packing an EX4600 Switch for Shipping
To pack an EX4600 switch for shipping: 1. Power down the switch and remove the power cables. See Powering Off an EX4600 Switch. 2. Remove the cables that connect the EX4600 switch to all external devices. 3. Remove all field-replaceable units (FRUs) from the switch. 4. Have one person support the weight of the switch while another person unscrews and removes the
mounting screws. 5. Remove the switch from the rack or cabinet (see Chassis Lifting Guidelines for an EX4600 Switch)
and place the switch in an antistatic bag. 6. Place the switch in the shipping carton. 7. Place the packing foam on top of and around the switch.

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8. If you are returning accessories or FRUs with the switch, pack them as instructed in "Packing EX4600 Switch Components for Shipping" on page 140.
9. Replace the accessory box on top of the packing foam. 10. Close the top of the cardboard shipping box and seal it with packing tape. 11. Write the RMA number on the exterior of the box to ensure proper tracking.
Packing EX4600 Switch Components for Shipping
CAUTION: Do not stack switch components. Return individual components in separate boxes if they do not fit together on one level in the shipping box.
To pack and ship EX4600 switch components: � Place individual FRUs in antistatic bags. � Ensure that the components are adequately protected with packing materials and packed so that the
pieces are prevented from moving around inside the carton. � Close the top of the cardboard shipping box and seal it with packing tape. � Write the RMA number on the exterior of the box to ensure proper tracking.

DC Power Disconnection Warning | 172 DC Power Grounding Requirements and Warning | 174 DC Power Wiring Sequence Warning | 174 DC Power Wiring Terminations Warning | 176 Multiple Power Supplies Disconnection Warning | 177 TN Power Warning | 178 Agency Approvals for EX Series Switches | 179 Compliance Statements for EMC Requirements for EX Series Switches | 180 Compliance Statements for Acoustic Noise for EX Series Switches | 185 Statements of Volatility for Juniper Network Devices | 185

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General Safety Guidelines and Warnings
The following guidelines help ensure your safety and protect the device from damage. The list of guidelines might not address all potentially hazardous situations in your working environment, so be alert and exercise good judgment at all times. � Perform only the procedures explicitly described in the hardware documentation for this device.
Make sure that only authorized service personnel perform other system services. � Keep the area around the device clear and free from dust before, during, and after installation. � Keep tools away from areas where people could trip over them while walking. � Do not wear loose clothing or jewelry, such as rings, bracelets, or chains, which could become caught
in the device. � Wear safety glasses if you are working under any conditions that could be hazardous to your eyes. � Do not perform any actions that create a potential hazard to people or make the equipment unsafe. � Never attempt to lift an object that is too heavy for one person to handle. � Never install or manipulate wiring during electrical storms. � Never install electrical jacks in wet locations unless the jacks are specifically designed for wet
environments. � Operate the device only when it is properly grounded. � Follow the instructions in this guide to properly ground the device to earth. � Replace fuses only with fuses of the same type and rating. � Do not open or remove chassis covers or sheet-metal parts unless instructions are provided in the
hardware documentation for this device. Such an action could cause severe electrical shock. � Do not push or force any objects through any opening in the chassis frame. Such an action could
result in electrical shock or fire. � Avoid spilling liquid onto the chassis or onto any device component. Such an action could cause
electrical shock or damage the device. � Avoid touching uninsulated electrical wires or terminals that have not been disconnected from their
power source. Such an action could cause electrical shock.

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� Some parts of the chassis, including AC and DC power supply surfaces, power supply unit handles, SFB card handles, and fan tray handles might become hot. The following label provides the warning of the hot surfaces on the chassis:
� Always ensure that all modules, power supplies, and cover panels are fully inserted and that the installation screws are fully tightened.
Definitions of Safety Warning Levels
The documentation uses the following levels of safety warnings (there are two Warning formats):
NOTE: You might find this information helpful in a particular situation, or you might overlook this important information if it was not highlighted in a Note.
CAUTION: You need to observe the specified guidelines to prevent minor injury or discomfort to you or severe damage to the device. Attention Veillez � respecter les consignes indiqu�es pour �viter toute incommodit� ou blessure l�g�re, voire des d�g�ts graves pour l'appareil.
LASER WARNING: This symbol alerts you to the risk of personal injury from a laser. Avertissement Ce symbole signale un risque de blessure provoqu�e par rayon laser.
WARNING: This symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Waarschuwing Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken,

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dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van standaard maatregelen om ongelukken te voorkomen.
Varoitus T�m� varoitusmerkki merkitsee vaaraa. Olet tilanteessa, joka voi johtaa ruumiinvammaan. Ennen kuin ty�skentelet mink��n laitteiston parissa, ota selv�� s�hk�kytkent�ihin liittyvist� vaaroista ja tavanomaisista onnettomuuksien ehk�isykeinoista.
Avertissement Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un �quipement, soyez conscient des dangers pos�s par les circuits �lectriques et familiarisez-vous avec les proc�dures couramment utilis�es pour �viter les accidents.
Warnung Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer K�rperverletzung f�hren k�nnte. Bevor Sie mit der Arbeit an irgendeinem Ger�t beginnen, seien Sie sich der mit elektrischen Stromkreisen verbundenen Gefahren und der Standardpraktiken zur Vermeidung von Unf�llen bewu�t.
Avvertenza Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di lavorare su qualsiasi apparecchiatura, occorre conoscere i pericoli relativi ai circuiti elettrici ed essere al corrente delle pratiche standard per la prevenzione di incidenti.
Advarsel Dette varselsymbolet betyr fare. Du befinner deg i en situasjon som kan f�re til personskade. F�r du utf�rer arbeid p� utstyr, m� du vare oppmerksom p� de faremomentene som elektriske kretser inneb�rer, samt gj�re deg kjent med vanlig praksis n�r det gjelder � unng� ulykker.
Aviso Este s�mbolo de aviso indica perigo. Encontra-se numa situa��o que lhe poder� causar danos f�sicos. Antes de come�ar a trabalhar com qualquer equipamento, familiarize-se com os perigos relacionados com circuitos el�ctricos, e com quaisquer pr�ticas comuns que possam prevenir poss�veis acidentes.
�Atenci�n! Este s�mbolo de aviso significa peligro. Existe riesgo para su integridad f�sica. Antes de manipular cualquier equipo, considerar los riesgos que entra�a la corriente el�ctrica y familiarizarse con los procedimientos est�ndar de prevenci�n de accidentes.
Varning! Denna varningssymbol signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utf�r arbete p� n�gon utrustning m�ste du vara medveten om farorna med elkretsar och k�nna till vanligt f�rfarande f�r att f�rebygga skador.

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Qualified Personnel Warning
WARNING: Only trained and qualified personnel should install or replace the device. Waarschuwing Installatie en reparaties mogen uitsluitend door getraind en bevoegd personeel uitgevoerd worden. Varoitus Ainoastaan koulutettu ja p�tev� henkil�kunta saa asentaa tai vaihtaa t�m�n laitteen. Avertissement Tout installation ou remplacement de l'appareil doit �tre r�alis� par du personnel qualifi� et comp�tent. Warnung Ger�t nur von geschultem, qualifiziertem Personal installieren oder auswechseln lassen. Avvertenza Solo personale addestrato e qualificato deve essere autorizzato ad installare o sostituire questo apparecchio. Advarsel Kun kvalifisert personell med riktig oppl�ring b�r montere eller bytte ut dette utstyret. Aviso Este equipamento dever� ser instalado ou substitu�do apenas por pessoal devidamente treinado e qualificado. �Atenci�n! Estos equipos deben ser instalados y reemplazados exclusivamente por personal t�cnico adecuadamente preparado y capacitado. Varning! Denna utrustning ska endast installeras och bytas ut av utbildad och kvalificerad personal.
Warning Statement for Norway and Sweden
WARNING: The equipment must be connected to an earthed mains socket-outlet. Advarsel Apparatet skal kobles til en jordet stikkontakt. Varning! Apparaten skall anslutas till jordat n�tuttag.

147
Fire Safety Requirements
IN THIS SECTION Fire Suppression | 147 Fire Suppression Equipment | 147
In the event of a fire emergency, the safety of people is the primary concern. You should establish procedures for protecting people in the event of a fire emergency, provide safety training, and properly provision fire-control equipment and fire extinguishers. In addition, you should establish procedures to protect your equipment in the event of a fire emergency. Juniper Networks products should be installed in an environment suitable for electronic equipment. We recommend that fire suppression equipment be available in the event of a fire in the vicinity of the equipment and that all local fire, safety, and electrical codes and ordinances be observed when you install and operate your equipment.
Fire Suppression
In the event of an electrical hazard or an electrical fire, you should first turn power off to the equipment at the source. Then use a Type C fire extinguisher, which uses noncorrosive fire retardants, to extinguish the fire.
Fire Suppression Equipment
Type C fire extinguishers, which use noncorrosive fire retardants such as carbon dioxide and HalotronTM, are most effective for suppressing electrical fires. Type C fire extinguishers displace oxygen from the point of combustion to eliminate the fire. For extinguishing fire on or around equipment that draws air from the environment for cooling, you should use this type of inert oxygen displacement extinguisher instead of an extinguisher that leaves residues on equipment. Do not use multipurpose Type ABC chemical fire extinguishers (dry chemical fire extinguishers). The primary ingredient in these fire extinguishers is monoammonium phosphate, which is very sticky and

148
difficult to clean. In addition, in the presence of minute amounts of moisture, monoammonium phosphate can become highly corrosive and corrodes most metals. Any equipment in a room in which a chemical fire extinguisher has been discharged is subject to premature failure and unreliable operation. The equipment is considered to be irreparably damaged.
NOTE: To keep warranties effective, do not use a dry chemical fire extinguisher to control a fire at or near a Juniper Networks device. If a dry chemical fire extinguisher is used, the unit is no longer eligible for coverage under a service agreement.
We recommend that you dispose of any irreparably damaged equipment in an environmentally responsible manner.
Installation Instructions Warning
WARNING: Read the installation instructions before you connect the device to a power source. Waarschuwing Raadpleeg de installatie-aanwijzingen voordat u het systeem met de voeding verbindt. Varoitus Lue asennusohjeet ennen j�rjestelm�n yhdist�mist� virtal�hteeseen. Avertissement Avant de brancher le syst�me sur la source d'alimentation, consulter les directives d'installation. Warnung Lesen Sie die Installationsanweisungen, bevor Sie das System an die Stromquelle anschlie�en. Avvertenza Consultare le istruzioni di installazione prima di collegare il sistema all'alimentatore. Advarsel Les installasjonsinstruksjonene f�r systemet kobles til str�mkilden. Aviso Leia as instru�es de instala��o antes de ligar o sistema � sua fonte de energia. �Atenci�n! Ver las instrucciones de instalaci�n antes de conectar el sistema a la red de alimentaci�n. Varning! L�s installationsanvisningarna innan du kopplar systemet till dess str�mf�rs�rjningsenhet.

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Chassis and Component Lifting Guidelines
� Before moving the device to a site, ensure that the site meets the power, environmental, and clearance requirements.
� Before lifting or moving the device, disconnect all external cables and wires. � As when lifting any heavy object, ensure that most of the weight is borne by your legs rather than
your back. Keep your knees bent and your back relatively straight. Do not twist your body as you lift. Balance the load evenly and be sure that your footing is firm. � Use the following lifting guidelines to lift devices and components: � Up to 39.7 lbs (18 kg): One person. � 39.7 lbs (18 kg) to 70.5 lbs (32 kg): Two or more people. � 70.5 lbs (32 kg) to 121.2 lbs (55 kg): Three or more people. � Above 121.2 lbs (55 kg): Material handling systems (such as levers, slings, lifts and so on) must be
used. When this is not practical, specially trained persons or systems must be used (riggers or movers).
Restricted Access Warning
WARNING: This unit is intended for installation in restricted access areas. A restricted access area is an area to which access can be gained only by service personnel through the use of a special tool, lock and key, or other means of security, and which is controlled by the authority responsible for the location. Waarschuwing Dit toestel is bedoeld voor installatie op plaatsen met beperkte toegang. Een plaats met beperkte toegang is een plaats waar toegang slechts door servicepersoneel verkregen kan worden door middel van een speciaal instrument, een slot en sleutel, of een ander veiligheidsmiddel, en welke beheerd wordt door de overheidsinstantie die verantwoordelijk is voor de locatie. Varoitus T�m� laite on tarkoitettu asennettavaksi paikkaan, johon p��sy on rajoitettua. Paikka, johon p��sy on rajoitettua, tarkoittaa paikkaa, johon vain huoltohenkil�st�

150
p��see jonkin erikoisty�kalun, lukkoon sopivan avaimen tai jonkin muun turvalaitteen avulla ja joka on paikasta vastuussa olevien toimivaltaisten henkil�iden valvoma.
Avertissement Cet appareil est � installer dans des zones d'acc�s r�serv�. Ces derni�res sont des zones auxquelles seul le personnel de service peut acc�der en utilisant un outil sp�cial, un m�canisme de verrouillage et une cl�, ou tout autre moyen de s�curit�. L'acc�s aux zones de s�curit� est sous le contr�le de l'autorit� responsable de l'emplacement.
Warnung Diese Einheit ist zur Installation in Bereichen mit beschr�nktem Zutritt vorgesehen. Ein Bereich mit beschr�nktem Zutritt ist ein Bereich, zu dem nur Wartungspersonal mit einem Spezialwerkzeugs, Schlo� und Schl�ssel oder anderer Sicherheitsvorkehrungen Zugang hat, und der von dem f�r die Anlage zust�ndigen Gremium kontrolliert wird.
Avvertenza Questa unit� deve essere installata in un'area ad accesso limitato. Un'area ad accesso limitato � un'area accessibile solo a personale di assistenza tramite un'attrezzo speciale, lucchetto, o altri dispositivi di sicurezza, ed � controllata dall'autorit� responsabile della zona.
Advarsel Denne enheten er laget for installasjon i omr�der med begrenset adgang. Et omr�de med begrenset adgang gir kun adgang til servicepersonale som bruker et spesielt verkt�y, l�s og n�kkel, eller en annen sikkerhetsanordning, og det kontrolleres av den autoriteten som er ansvarlig for omr�det.
Aviso Esta unidade foi concebida para instala��o em �reas de acesso restrito. Uma �rea de acesso restrito � uma �rea � qual apenas tem acesso o pessoal de servi�o autorizado, que possua uma ferramenta, chave e fechadura especial, ou qualquer outra forma de seguran�a. Esta �rea � controlada pela autoridade respons�vel pelo local.
�Atenci�n! Esta unidad ha sido dise�ada para instalarse en �reas de acceso restringido. �rea de acceso restringido significa un �rea a la que solamente tiene acceso el personal de servicio mediante la utilizaci�n de una herramienta especial, cerradura con llave, o alg�n otro medio de seguridad, y que est� bajo el control de la autoridad responsable del local.
Varning! Denna enhet �r avsedd f�r installation i omr�den med begr�nsat tilltr�de. Ett omr�de med begr�nsat tilltr�de f�r endast tilltr�das av servicepersonal med ett speciellt verktyg, l�s och nyckel, eller annan s�kerhetsanordning, och kontrolleras av den auktoritet som ansvarar f�r omr�det.

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Ramp Warning
WARNING: When installing the device, do not use a ramp inclined at more than 10 degrees. Waarschuwing Gebruik een oprijplaat niet onder een hoek van meer dan 10 graden. Varoitus �l� k�yt� sellaista kaltevaa pintaa, jonka kaltevuus ylitt�� 10 astetta. Avertissement Ne pas utiliser une rampe dont l'inclinaison est sup�rieure � 10 degr�s. Warnung Keine Rampen mit einer Neigung von mehr als 10 Grad verwenden. Avvertenza Non usare una rampa con pendenza superiore a 10 gradi. Advarsel Bruk aldri en rampe som heller mer enn 10 grader. Aviso N�o utilize uma rampa com uma inclina��o superior a 10 graus. �Atenci�n! No usar una rampa inclinada m�s de 10 grados Varning! Anv�nd inte ramp med en lutning p� mer �n 10 grader.
Rack-Mounting and Cabinet-Mounting Warnings
Ensure that the rack or cabinet in which the device is installed is evenly and securely supported. Uneven mechanical loading could lead to a hazardous condition.
WARNING: To prevent bodily injury when mounting or servicing the device in a rack, take the following precautions to ensure that the system remains stable. The following directives help maintain your safety: � The device must be installed in a rack that is secured to the building structure. � The device should be mounted at the bottom of the rack if it is the only unit in the
rack. � When mounting the device on a partially filled rack, load the rack from the bottom
to the top with the heaviest component at the bottom of the rack.

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� If the rack is provided with stabilizing equipment, install the stabilizers before mounting or servicing the device in the rack.
Waarschuwing Om lichamelijk letsel te voorkomen wanneer u dit toestel in een rek monteert of het daar een servicebeurt geeft, moet u speciale voorzorgsmaatregelen nemen om ervoor te zorgen dat het toestel stabiel blijft. De onderstaande richtlijnen worden verstrekt om uw veiligheid te verzekeren:
� De Juniper Networks switch moet in een stellage worden ge�nstalleerd die aan een bouwsel is verankerd.
� Dit toestel dient onderaan in het rek gemonteerd te worden als het toestel het enige in het rek is.
� Wanneer u dit toestel in een gedeeltelijk gevuld rek monteert, dient u het rek van onderen naar boven te laden met het zwaarste onderdeel onderaan in het rek.
� Als het rek voorzien is van stabiliseringshulpmiddelen, dient u de stabilisatoren te monteren voordat u het toestel in het rek monteert of het daar een servicebeurt geeft.
Varoitus Kun laite asetetaan telineeseen tai huolletaan sen ollessa telineess�, on noudatettava erityisi� varotoimia j�rjestelm�n vakavuuden s�ilytt�miseksi, jotta v�ltyt��n loukkaantumiselta. Noudata seuraavia turvallisuusohjeita:
� Juniper Networks switch on asennettava telineeseen, joka on kiinnitetty rakennukseen.
� Jos telineess� ei ole muita laitteita, aseta laite telineen alaosaan.
� Jos laite asetetaan osaksi t�ytettyyn telineeseen, aloita kuormittaminen sen alaosasta kaikkein raskaimmalla esineell� ja siirry sitten sen yl�osaan.
� Jos telinett� varten on vakaimet, asenna ne ennen laitteen asettamista telineeseen tai sen huoltamista siin�.
Avertissement Pour �viter toute blessure corporelle pendant les op�rations de montage ou de r�paration de cette unit� en casier, il convient de prendre des pr�cautions sp�ciales afin de maintenir la stabilit� du syst�me. Les directives ci-dessous sont destin�es � assurer la protection du personnel:
� Le rack sur lequel est mont� le Juniper Networks switch doit �tre fix� � la structure du b�timent.

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� Si cette unit� constitue la seule unit� mont�e en casier, elle doit �tre plac�e dans le bas.
� Si cette unit� est mont�e dans un casier partiellement rempli, charger le casier de bas en haut en pla�ant l'�l�ment le plus lourd dans le bas.
� Si le casier est �quip� de dispositifs stabilisateurs, installer les stabilisateurs avant de monter ou de r�parer l'unit� en casier.
Warnung Zur Vermeidung von K�rperverletzung beim Anbringen oder Warten dieser Einheit in einem Gestell m�ssen Sie besondere Vorkehrungen treffen, um sicherzustellen, da� das System stabil bleibt. Die folgenden Richtlinien sollen zur Gew�hrleistung Ihrer Sicherheit dienen:
� Der Juniper Networks switch mu� in einem Gestell installiert werden, das in der Geb�udestruktur verankert ist.
� Wenn diese Einheit die einzige im Gestell ist, sollte sie unten im Gestell angebracht werden.
� Bei Anbringung dieser Einheit in einem zum Teil gef�llten Gestell ist das Gestell von unten nach oben zu laden, wobei das schwerste Bauteil unten im Gestell anzubringen ist.
� Wird das Gestell mit Stabilisierungszubeh�r geliefert, sind zuerst die Stabilisatoren zu installieren, bevor Sie die Einheit im Gestell anbringen oder sie warten.
Avvertenza Per evitare infortuni fisici durante il montaggio o la manutenzione di questa unit� in un supporto, occorre osservare speciali precauzioni per garantire che il sistema rimanga stabile. Le seguenti direttive vengono fornite per garantire la sicurezza personale:
� Il Juniper Networks switch deve essere installato in un telaio, il quale deve essere fissato alla struttura dell'edificio.
� Questa unit� deve venire montata sul fondo del supporto, se si tratta dell'unica unit� da montare nel supporto.
� Quando questa unit� viene montata in un supporto parzialmente pieno, caricare il supporto dal basso all'alto, con il componente pi� pesante sistemato sul fondo del supporto.
� Se il supporto � dotato di dispositivi stabilizzanti, installare tali dispositivi prima di montare o di procedere alla manutenzione dell'unit� nel supporto.

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Advarsel Unng� fysiske skader under montering eller reparasjonsarbeid p� denne enheten n�r den befinner seg i et kabinett. V�r n�ye med at systemet er stabilt. F�lgende retningslinjer er gitt for � verne om sikkerheten:
� Juniper Networks switch m� installeres i et stativ som er forankret til bygningsstrukturen.
� Denne enheten b�r monteres nederst i kabinettet hvis dette er den eneste enheten i kabinettet.
� Ved montering av denne enheten i et kabinett som er delvis fylt, skal kabinettet lastes fra bunnen og opp med den tyngste komponenten nederst i kabinettet.
� Hvis kabinettet er utstyrt med stabiliseringsutstyr, skal stabilisatorene installeres f�r montering eller utf�ring av reparasjonsarbeid p� enheten i kabinettet.
Aviso Para se prevenir contra danos corporais ao montar ou reparar esta unidade numa estante, dever� tomar precau�es especiais para se certificar de que o sistema possui um suporte est�vel. As seguintes directrizes ajud�-lo-�o a efectuar o seu trabalho com seguran�a:
� O Juniper Networks switch dever� ser instalado numa prateleira fixa � estrutura do edificio.
� Esta unidade dever� ser montada na parte inferior da estante, caso seja esta a �nica unidade a ser montada.
� Ao montar esta unidade numa estante parcialmente ocupada, coloque os itens mais pesados na parte inferior da estante, arrumando-os de baixo para cima.
� Se a estante possuir um dispositivo de estabiliza��o, instale-o antes de montar ou reparar a unidade.
�Atenci�n! Para evitar lesiones durante el montaje de este equipo sobre un bastidor, oeriormente durante su mantenimiento, se debe poner mucho cuidado en que el sistema quede bien estable. Para garantizar su seguridad, proceda seg�n las siguientes instrucciones:
� El Juniper Networks switch debe instalarse en un bastidor fijado a la estructura del edificio.
� Colocar el equipo en la parte inferior del bastidor, cuando sea la �nica unidad en el mismo.

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� Cuando este equipo se vaya a instalar en un bastidor parcialmente ocupado, comenzar la instalaci�n desde la parte inferior hacia la superior colocando el equipo m�s pesado en la parte inferior.
� Si el bastidor dispone de dispositivos estabilizadores, instalar �stos antes de montar o proceder al mantenimiento del equipo instalado en el bastidor.
Varning! F�r att undvika kroppsskada n�r du installerar eller utf�r underh�llsarbete p� denna enhet p� en st�llning m�ste du vidta s�rskilda f�rsiktighets�tg�rder f�r att f�rs�kra dig om att systemet st�r stadigt. F�ljande riktlinjer ges f�r att trygga din s�kerhet: � Juniper Networks switch m�ste installeras i en st�llning som �r f�rankrad i
byggnadens struktur. � Om denna enhet �r den enda enheten p� st�llningen skall den installeras l�ngst ned
p� st�llningen. � Om denna enhet installeras p� en delvis fylld st�llning skall st�llningen fyllas nedifr�n
och upp, med de tyngsta enheterna l�ngst ned p� st�llningen. � Om st�llningen �r f�rsedd med stabiliseringsdon skall dessa monteras fast innan
enheten installeras eller underh�lls p� st�llningen.
Grounded Equipment Warning
WARNING: This device must be properly grounded at all times. Follow the instructions in this guide to properly ground the device to earth. Waarschuwing Dit apparaat moet altijd goed geaard zijn. Volg de instructies in deze gids om het apparaat goed te aarden. Varoitus Laitteen on oltava pysyv�sti maadoitettu. Maadoita laite asianmukaisesti noudattamalla t�m�n oppaan ohjeita. Avertissement L'appareil doit �tre correctement mis � la terre � tout moment. Suivez les instructions de ce guide pour correctement mettre l'appareil � la terre. Warnung Das Ger�t muss immer ordnungsgem�� geerdet sein. Befolgen Sie die Anweisungen in dieser Anleitung, um das Ger�t ordnungsgem�� zu erden.

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Avvertenza Questo dispositivo deve sempre disporre di una connessione a massa. Seguire le istruzioni indicate in questa guida per connettere correttamente il dispositivo a massa. Advarsel Denne enheten p� jordes skikkelig hele tiden. F�lg instruksjonene i denne veiledningen for � jorde enheten. Aviso Este equipamento dever� estar ligado � terra. Siga las instrucciones en esta gu�a para conectar correctamente este dispositivo a tierra. �Atenci�n! Este dispositivo debe estar correctamente conectado a tierra en todo momento. Siga las instrucciones en esta gu�a para conectar correctamente este dispositivo a tierra. Varning! Den h�r enheten m�ste vara ordentligt jordad. F�lj instruktionerna i den h�r guiden f�r att jorda enheten ordentligt.
Laser and LED Safety Guidelines and Warnings
IN THIS SECTION General Laser Safety Guidelines | 157 Class 1 Laser Product Warning | 157 Class 1 LED Product Warning | 158 Laser Beam Warning | 158
Juniper Networks devices are equipped with laser transmitters, which are considered a Class 1 Laser Product by the U.S. Food and Drug Administration and are evaluated as a Class 1 Laser Product per EN 60825-1 requirements. Observe the following guidelines and warnings:

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General Laser Safety Guidelines
When working around ports that support optical transceivers, observe the following safety guidelines to prevent eye injury: � Do not look into unterminated ports or at fibers that connect to unknown sources. � Do not examine unterminated optical ports with optical instruments. � Avoid direct exposure to the beam.
LASER WARNING: Unterminated optical connectors can emit invisible laser radiation. The lens in the human eye focuses all the laser power on the retina, so focusing the eye directly on a laser source--even a low-power laser--could permanently damage the eye. Avertissement Les connecteurs � fibre optique sans terminaison peuvent �mettre un rayonnement laser invisible. Le cristallin de l'oeil humain faisant converger toute la puissance du laser sur la r�tine, toute focalisation directe de l'oeil sur une source laser, -- m�me de faible puissance--, peut entra�ner des l�sions oculaires irr�versibles.
Class 1 Laser Product Warning
LASER WARNING: Class 1 laser product. Waarschuwing Klasse-1 laser produkt. Varoitus Luokan 1 lasertuote. Avertissement Produit laser de classe I. Warnung Laserprodukt der Klasse 1. Avvertenza Prodotto laser di Classe 1. Advarsel Laserprodukt av klasse 1. Aviso Produto laser de classe 1. �Atenci�n! Producto l�ser Clase I. Varning! Laserprodukt av klass 1.

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Class 1 LED Product Warning
LASER WARNING: Class 1 LED product. Waarschuwing Klasse 1 LED-product. Varoitus Luokan 1 valodiodituote. Avertissement Alarme de produit LED Class I. Warnung Class 1 LED-Produktwarnung. Avvertenza Avvertenza prodotto LED di Classe 1. Advarsel LED-produkt i klasse 1. Aviso Produto de classe 1 com LED. �Atenci�n! Aviso sobre producto LED de Clase 1. Varning! Lysdiodprodukt av klass 1.
Laser Beam Warning
LASER WARNING: Do not stare into the laser beam or view it directly with optical instruments. Waarschuwing Niet in de straal staren of hem rechtstreeks bekijken met optische instrumenten. Varoitus �l� katso s�teeseen �l�k� tarkastele sit� suoraan optisen laitteen avulla. Avertissement Ne pas fixer le faisceau des yeux, ni l'observer directement � l'aide d'instruments optiques. Warnung Nicht direkt in den Strahl blicken und ihn nicht direkt mit optischen Ger�ten pr�fen. Avvertenza Non fissare il raggio con gli occhi n� usare strumenti ottici per osservarlo direttamente. Advarsel Stirr eller se ikke direkte p strlen med optiske instrumenter.

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Aviso N�o olhe fixamente para o raio, nem olhe para ele directamente com instrumentos �pticos. �Atenci�n! No mirar fijamente el haz ni observarlo directamente con instrumentos �pticos. Varning! Rikta inte blicken in mot str�len och titta inte direkt p� den genom optiska instrument.
Radiation from Open Port Apertures Warning
LASER WARNING: Because invisible radiation might be emitted from the aperture of the port when no fiber cable is connected, avoid exposure to radiation and do not stare into open apertures. Waarschuwing Aangezien onzichtbare straling vanuit de opening van de poort kan komen als er geen fiberkabel aangesloten is, dient blootstelling aan straling en het kijken in open openingen vermeden te worden. Varoitus Koska portin aukosta voi emittoitua n�kym�t�nt� s�teily�, kun kuitukaapelia ei ole kytkettyn�, v�lt� s�teilylle altistumista �l�k� katso avoimiin aukkoihin. Avertissement Des radiations invisibles � l'il nu pouvant traverser l'ouverture du port lorsqu'aucun c�ble en fibre optique n'y est connect�, il est recommand� de ne pas regarder fixement l'int�rieur de ces ouvertures. Warnung Aus der Port-�ffnung k�nnen unsichtbare Strahlen emittieren, wenn kein Glasfaserkabel angeschlossen ist. Vermeiden Sie es, sich den Strahlungen auszusetzen, und starren Sie nicht in die �ffnungen! Avvertenza Quando i cavi in fibra non sono inseriti, radiazioni invisibili possono essere emesse attraverso l'apertura della porta. Evitate di esporvi alle radiazioni e non guardate direttamente nelle aperture. Advarsel Unng� utsettelse for str�ling, og stirr ikke inn i �pninger som er �pne, fordi usynlig str�ling kan emiteres fra portens �pning n�r det ikke er tilkoblet en fiberkabel. Aviso Dada a possibilidade de emiss�o de radia��o invis�vel atrav�s do orif�cio da via de acesso, quando esta n�o tiver nenhum cabo de fibra conectado, dever� evitar an EXposi��o � radia��o e n�o dever� olhar fixamente para orif�cios que se encontrarem a descoberto.

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�Atenci�n! Debido a que la apertura del puerto puede emitir radiaci�n invisible cuando no existe un cable de fibra conectado, evite mirar directamente a las aperturas para no exponerse a la radiaci�n. Varning! Osynlig str�lning kan avges fr�n en port�ppning utan ansluten fiberkabel och du b�r d�rf�r undvika att bli utsatt f�r str�lning genom att inte stirra in i oskyddade �ppningar.
Maintenance and Operational Safety Guidelines and Warnings
IN THIS SECTION Battery Handling Warning | 160 Jewelry Removal Warning | 161 Lightning Activity Warning | 163 Operating Temperature Warning | 164 Product Disposal Warning | 165
While performing the maintenance activities for devices, observe the following guidelines and warnings:
Battery Handling Warning
WARNING: Replacing a battery incorrectly might result in an explosion. Replace a battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. Waarschuwing Er is ontploffingsgevaar als de batterij verkeerd vervangen wordt. Vervang de batterij slechts met hetzelfde of een equivalent type dat door de fabrikant aanbevolen is. Gebruikte batterijen dienen overeenkomstig fabrieksvoorschriften weggeworpen te worden.

161
Varoitus R�j�hdyksen vaara, jos akku on vaihdettu v��r��n akkuun. K�yt� vaihtamiseen ainoastaan saman- tai vastaavantyyppist� akkua, joka on valmistajan suosittelema. H�vit� k�ytetyt akut valmistajan ohjeiden mukaan.
Avertissement Danger d'explosion si la pile n'est pas remplac�e correctement. Ne la remplacer que par une pile de type semblable ou �quivalent, recommand�e par le fabricant. Jeter les piles usag�es conform�ment aux instructions du fabricant.
Warnung Bei Einsetzen einer falschen Batterie besteht Explosionsgefahr. Ersetzen Sie die Batterie nur durch den gleichen oder vom Hersteller empfohlenen Batterietyp. Entsorgen Sie die benutzten Batterien nach den Anweisungen des Herstellers.
Advarsel Det kan v�re fare for eksplosjon hvis batteriet skiftes p� feil m�te. Skift kun med samme eller tilsvarende type som er anbefalt av produsenten. Kasser brukte batterier i henhold til produsentens instruksjoner.
Avvertenza Pericolo di esplosione se la batteria non � installata correttamente. Sostituire solo con una di tipo uguale o equivalente, consigliata dal produttore. Eliminare le batterie usate secondo le istruzioni del produttore.
Aviso Existe perigo de explos�o se a bateria for substitu�da incorrectamente. Substitua a bateria por uma bateria igual ou de um tipo equivalente recomendado pelo fabricante. Destrua as baterias usadas conforme as instru�es do fabricante.
�Atenci�n! Existe peligro de explosi�n si la bater�a se reemplaza de manera incorrecta. Reemplazar la bater�an EXclusivamente con el mismo tipo o el equivalente recomendado por el fabricante. Desechar las bater�as gastadas seg�n las instrucciones del fabricante.
Varning! Explosionsfara vid felaktigt batteribyte. Ers�tt endast batteriet med samma batterityp som rekommenderas av tillverkaren eller motsvarande. F�lj tillverkarens anvisningar vid kassering av anv�nda batterier.
Jewelry Removal Warning
WARNING: Before working on equipment that is connected to power lines, remove jewelry, including rings, necklaces, and watches. Metal objects heat up when connected to power and ground and can cause serious burns or can be welded to the terminals.

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Waarschuwing Alvorens aan apparatuur te werken die met elektrische leidingen is verbonden, sieraden (inclusief ringen, kettingen en horloges) verwijderen. Metalen voorwerpen worden warm wanneer ze met stroom en aarde zijn verbonden, en kunnen ernstige brandwonden veroorzaken of het metalen voorwerp aan de aansluitklemmen lassen.
Varoitus Ennen kuin ty�skentelet voimavirtajohtoihin kytkettyjen laitteiden parissa, ota pois kaikki korut (sormukset, kaulakorut ja kellot mukaan lukien). Metalliesineet kuumenevat, kun ne ovat yhteydess� s�hk�virran ja maan kanssa, ja ne voivat aiheuttaa vakavia palovammoja tai hitsata metalliesineet kiinni liit�nt�napoihin.
Avertissement Avant d'acc�der � cet �quipement connect� aux lignes �lectriques, �ter tout bijou (anneaux, colliers et montres compris). Lorsqu'ils sont branch�s � l'alimentation et reli�s � la terre, les objets m�talliques chauffent, ce qui peut provoquer des blessures graves ou souder l'objet m�tallique aux bornes.
Warnung Vor der Arbeit an Ger�ten, die an das Netz angeschlossen sind, jeglichen Schmuck (einschlie�lich Ringe, Ketten und Uhren) abnehmen. Metallgegenst�nde erhitzen sich, wenn sie an das Netz und die Erde angeschlossen werden, und k�nnen schwere Verbrennungen verursachen oder an die Anschlu�klemmen angeschwei�t werden.
Avvertenza Prima di intervenire su apparecchiature collegate alle linee di alimentazione, togliersi qualsiasi monile (inclusi anelli, collane, braccialetti ed orologi). Gli oggetti metallici si riscaldano quando sono collegati tra punti di alimentazione e massa: possono causare ustioni gravi oppure il metallo pu� saldarsi ai terminali.
Advarsel Fjern alle smykker (inkludert ringer, halskjeder og klokker) f�r du skal arbeide p� utstyr som er koblet til kraftledninger. Metallgjenstander som er koblet til kraftledninger og jord blir sv�rt varme og kan for�rsake alvorlige brannskader eller smelte fast til polene.
Aviso Antes de trabalhar em equipamento que esteja ligado a linhas de corrente, retire todas as j�ias que estiver a usar (incluindo an�is, fios e rel�gios). Os objectos met�licos aquecer�o em contacto com a corrente e em contacto com a liga��o � terra, podendo causar queimaduras graves ou ficarem soldados aos terminais.
�Atenci�n! Antes de operar sobre equipos conectados a l�neas de alimentaci�n, quitarse las joyas (incluidos anillos, collares y relojes). Los objetos de metal se calientan cuando se conectan a la alimentaci�n y a tierra, lo que puede ocasionar quemaduras graves o que los objetos met�licos queden soldados a los bornes.

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Varning! Tag av alla smycken (inklusive ringar, halsband och armbandsur) innan du arbetar p� utrustning som �r kopplad till kraftledningar. Metallobjekt hettas upp n�r de kopplas ihop med str�m och jord och kan f�rorsaka allvarliga br�nnskador; metallobjekt kan ocks� sammansvetsas med kontakterna.
Lightning Activity Warning
WARNING: Do not work on the system or connect or disconnect cables during periods of lightning activity. Waarschuwing Tijdens onweer dat gepaard gaat met bliksem, dient u niet aan het systeem te werken of kabels aan te sluiten of te ontkoppelen. Varoitus �l� ty�skentele j�rjestelm�n parissa �l�k� yhdist� tai irrota kaapeleita ukkosilmalla. Avertissement Ne pas travailler sur le syst�me ni brancher ou d�brancher les c�bles pendant un orage. Warnung Arbeiten Sie nicht am System und schlie�en Sie keine Kabel an bzw. trennen Sie keine ab, wenn es gewittert. Avvertenza Non lavorare sul sistema o collegare oppure scollegare i cavi durante un temporale con fulmini. Advarsel Utf�r aldri arbeid p� systemet, eller koble kabler til eller fra systemet n�r det tordner eller lyner. Aviso N�o trabalhe no sistema ou ligue e desligue cabos durante per�odos de mau tempo (trovoada). �Atenci�n! No operar el sistema ni conectar o desconectar cables durante el transcurso de descargas el�ctricas en la atm�sfera. Varning! Vid �ska skall du aldrig utf�ra arbete p� systemet eller ansluta eller koppla loss kablar.

164
Operating Temperature Warning
WARNING: To prevent the device from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature. To prevent airflow restriction, allow at least 6 in. (15.2 cm) of clearance around the ventilation openings. Waarschuwing Om te voorkomen dat welke switch van de Juniper Networks router dan ook oververhit raakt, dient u deze niet te bedienen op een plaats waar de maximale aanbevolen omgevingstemperatuur van 40� C wordt overschreden. Om te voorkomen dat de luchtstroom wordt beperkt, dient er minstens 15,2 cm speling rond de ventilatieopeningen te zijn.
Varoitus Ettei Juniper Networks switch-sarjan reititin ylikuumentuisi, sit� ei saa k�ytt�� tilassa, jonka l�mp�tila ylitt�� korkeimman suositellun ymp�rist�l�mp�tilan 40� C. Ettei ilmanvaihto estyisi, tuuletusaukkojen ymp�rille on j�tett�v� ainakin 15,2 cm tilaa.
Avertissement Pour �viter toute surchauffe des routeurs de la gamme Juniper Networks switch, ne l'utilisez pas dans une zone o� la temp�rature ambiante est sup�rieure � 40� C. Pour permettre un flot d'air constant, d�gagez un espace d'au moins 15,2 cm autour des ouvertures de ventilations.
Warnung Um einen Router der switch vor �berhitzung zu sch�tzen, darf dieser nicht in einer Gegend betrieben werden, in der die Umgebungstemperatur das empfohlene Maximum von 40� C �berschreitet. Um L�ftungsverschlu� zu verhindern, achten Sie darauf, da� mindestens 15,2 cm lichter Raum um die L�ftungs�ffnungen herum frei bleibt.
Avvertenza Per evitare il surriscaldamento dei switch, non adoperateli in un locale che ecceda la temperatura ambientale massima di 40� C. Per evitare che la circolazione dell'aria sia impedita, lasciate uno spazio di almeno 15.2 cm di fronte alle aperture delle ventole.
Advarsel Unng� overoppheting av eventuelle rutere i Juniper Networks switch Disse skal ikke brukes p� steder der den anbefalte maksimale omgivelsestemperaturen overstiger 40� C (104� F). S�rg for at klaringen rundt lufte�pningene er minst 15,2 cm (6 tommer) for � forhindre nedsatt luftsirkulasjon.
Aviso Para evitar o sobreaquecimento do encaminhador Juniper Networks switch, n�o utilize este equipamento numa �rea que exceda a temperatura m�xima recomendada de 40� C. Para evitar a restri��o � circula��o de ar, deixe pelo menos um espa�o de 15,2 cm � volta das aberturas de ventila��o.

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�Atenci�n! Para impedir que un encaminador de la serie Juniper Networks switch se recaliente, no lo haga funcionar en un �rea en la que se supere la temperatura ambiente m�xima recomendada de 40� C. Para impedir la restricci�n de la entrada de aire, deje un espacio m�nimo de 15,2 cm alrededor de las aperturas para ventilaci�n. Varning! F�rhindra att en Juniper Networks switch �verhettas genom att inte anv�nda den i ett omr�de d�r den maximalt rekommenderade omgivningstemperaturen p� 40� C �verskrids. F�rhindra att luftcirkulationen inskr�nks genom att se till att det finns fritt utrymme p� minst 15,2 cm omkring ventilations�ppningarna.
Product Disposal Warning
WARNING: Disposal of this device must be handled according to all national laws and regulations. Waarschuwing Dit produkt dient volgens alle landelijke wetten en voorschriften te worden afgedankt. Varoitus T�m�n tuotteen lopullisesta h�vitt�misest� tulee huolehtia kaikkia valtakunnallisia lakeja ja s��nn�ksi� noudattaen. Avertissement La mise au rebut d�finitive de ce produit doit �tre effectu�e conform�ment � toutes les lois et r�glementations en vigueur. Warnung Dieses Produkt mu� den geltenden Gesetzen und Vorschriften entsprechend entsorgt werden. Avvertenza L'eliminazione finale di questo prodotto deve essere eseguita osservando le normative italiane vigenti in materia Advarsel Endelig disponering av dette produktet m� skje i henhold til nasjonale lover og forskrifter. Aviso A descartagem final deste produto dever� ser efectuada de acordo com os regulamentos e a legisla��o nacional. �Atenci�n! El desecho final de este producto debe realizarse seg�n todas las leyes y regulaciones nacionales Varning! Slutlig kassering av denna produkt b�r sk�tas i enlighet med landets alla lagar och f�reskrifter.

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General Electrical Safety Guidelines and Warnings
WARNING: Certain ports on the device are designed for use as intrabuilding (withinthe-building) interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE) and require isolation from the exposed outside plant (OSP) cabling. To comply with NEBS requirements and protect against lightning surges and commercial power disturbances, the intrabuilding ports must not be metallically connected to interfaces that connect to the OSP or its wiring. The intrabuilding ports on the device are suitable for connection to intrabuilding or unexposed wiring or cabling only. The addition of primary protectors is not sufficient protection for connecting these interfaces metallically to OSP wiring. Avertissement Certains ports de l'appareil sont destin�s � un usage en int�rieur uniquement (ports Type 2 ou Type 4 tels que d�crits dans le document GR-1089-CORE) et doivent �tre isol�s du c�blage de l'installation ext�rieure expos�e. Pour respecter les exigences NEBS et assurer une protection contre la foudre et les perturbations de tension secteur, les ports pour int�rieur ne doivent pas �tre raccord�s physiquement aux interfaces pr�vues pour la connexion � l'installation ext�rieure ou � son c�blage. Les ports pour int�rieur de l'appareil sont r�serv�s au raccordement de c�bles pour int�rieur ou non expos�s uniquement. L'ajout de protections ne constitue pas une pr�caution suffisante pour raccorder physiquement ces interfaces au c�blage de l'installation ext�rieure.
CAUTION: Before removing or installing components of a device, connect an electrostatic discharge (ESD) grounding strap to an ESD point and wrap and fasten the other end of the strap around your bare wrist. Failure to use an ESD grounding strap could result in damage to the device. Attention Avant de retirer ou d'installer des composants d'un appareil, raccordez un bracelet antistatique � un point de d�charge �lectrostatique et fixez le bracelet � votre poignet nu. L'absence de port d'un bracelet antistatique pourrait provoquer des d�g�ts sur l'appareil.
� Install the device in compliance with the following local, national, and international electrical codes:
� United States--National Fire Protection Association (NFPA 70), United States National Electrical Code.
� Other countries--International Electromechanical Commission (IEC) 60364, Part 1 through Part 7.
� Evaluated to the TN power system.

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� Canada--Canadian Electrical Code, Part 1, CSA C22.1. � Suitable for installation in Information Technology Rooms in accordance with Article 645 of the
National Electrical Code and NFPA 75. Peut �tre install� dans des salles de mat�riel de traitement de l'information conform�ment � l'article 645 du National Electrical Code et � la NFPA 75. � Locate the emergency power-off switch for the room in which you are working so that if an electrical accident occurs, you can quickly turn off the power. � Make sure that grounding surfaces are cleaned and brought to a bright finish before grounding connections are made. � Do not work alone if potentially hazardous conditions exist anywhere in your workspace. � Never assume that power is disconnected from a circuit. Always check the circuit before starting to work. � Carefully look for possible hazards in your work area, such as moist floors, ungrounded power extension cords, and missing safety grounds. � Operate the device within marked electrical ratings and product usage instructions. � To ensure that the device and peripheral equipment function safely and correctly, use the cables and connectors specified for the attached peripheral equipment, and make certain they are in good condition. You can remove and replace many device components without powering off or disconnecting power to the device, as detailed elsewhere in the hardware documentation for this device. Never install equipment that appears to be damaged.
Action to Take After an Electrical Accident
If an electrical accident results in an injury, take the following actions in this order: 1. Use caution. Be aware of potentially hazardous conditions that could cause further injury. 2. Disconnect power from the device. 3. If possible, send another person to get medical aid. Otherwise, assess the condition of the victim,
then call for help.

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Prevention of Electrostatic Discharge Damage
Device components that are shipped in antistatic bags are sensitive to damage from static electricity. Some components can be impaired by voltages as low as 30 V. You can easily generate potentially damaging static voltages whenever you handle plastic or foam packing material or if you move components across plastic or carpets. Observe the following guidelines to minimize the potential for electrostatic discharge (ESD) damage, which can cause intermittent or complete component failures: � Always use an ESD wrist strap when you are handling components that are subject to ESD damage,
and make sure that it is in direct contact with your skin. If a grounding strap is not available, hold the component in its antistatic bag (see Figure 49 on page 169) in one hand and touch the exposed, bare metal of the device with the other hand immediately before inserting the component into the device.
WARNING: For safety, periodically check the resistance value of the ESD grounding strap. The measurement must be in the range 1 through 10 Mohms. Avertissement Par mesure de s�curit�, v�rifiez r�guli�rement la r�sistance du bracelet antistatique. Cette valeur doit �tre comprise entre 1 et 10 m�gohms (Mohms).
� When handling any component that is subject to ESD damage and that is removed from the device, make sure the equipment end of your ESD wrist strap is attached to the ESD point on the chassis. If no grounding strap is available, touch the exposed, bare metal of the device to ground yourself before handling the component.
� Avoid contact between the component that is subject to ESD damage and your clothing. ESD voltages emitted from clothing can damage components.

169 � When removing or installing a component that is subject to ESD damage, always place it component-
side up on an antistatic surface, in an antistatic card rack, or in an antistatic bag (see Figure 49 on page 169). If you are returning a component, place it in an antistatic bag before packing it. Figure 49: Placing a Component into an Antistatic Bag
CAUTION: ANSI/TIA/EIA-568 cables such as Category 5e and Category 6 can get electrostatically charged. To dissipate this charge, always ground the cables to a suitable and safe earth ground before connecting them to the system. Attention Les c�bles ANSI/TIA/EIA-568, par exemple Cat 5e et Cat 6, peuvent emmagasiner des charges �lectrostatiques. Pour �vacuer ces charges, reliez toujours les c�bles � une prise de terre adapt�e avant de les raccorder au syst�me.
AC Power Electrical Safety Guidelines
The following electrical safety guidelines apply to AC-powered devices: � Note the following warnings printed on the device:
"CAUTION: THIS UNIT HAS MORE THAN ONE POWER SUPPLY CORD. DISCONNECT ALL POWER SUPPLY CORDS BEFORE SERVICING TO AVOID ELECTRIC SHOCK."

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"ATTENTION: CET APPAREIL COMPORTE PLUS D'UN CORDON D'ALIMENTATION. AFIN DE PR�VENIR LES CHOCS �LECTRIQUES, D�BRANCHER TOUT CORDON D'ALIMENTATION AVANT DE FAIRE LE D�PANNAGE." � AC-powered devices are shipped with a three-wire electrical cord with a grounding-type plug that fits only a grounding-type power outlet. Do not circumvent this safety feature. Equipment grounding must comply with local and national electrical codes. � You must provide an external certified circuit breaker (2-pole circuit breaker or 4-pole circuit breaker based on your device) rated minimum 20 A in the building installation. � The power cord serves as the main disconnecting device for the AC-powered device. The socket outlet must be near the AC-powered device and be easily accessible. � For devices that have more than one power supply connection, you must ensure that all power connections are fully disconnected so that power to the device is completely removed to prevent electric shock. To disconnect power, unplug all power cords (one for each power supply).
Power Cable Warning (Japanese)
WARNING: The attached power cable is only for this product. Do not use the cable for another product.
AC Power Disconnection Warning
WARNING: Before working on the device or near power supplies, unplug all the power cords from an AC-powered device. Waarschuwing Voordat u aan een frame of in de nabijheid van voedingen werkt, dient u bij wisselstroom toestellen de stekker van het netsnoer uit het stopcontact te halen.

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Varoitus Kytke irti vaihtovirtalaitteiden virtajohto, ennen kuin teet mit��n asennuspohjalle tai ty�skentelet virtal�hteiden l�heisyydess�. Avertissement Avant de travailler sur un ch�ssis ou � proximit� d'une alimentation �lectrique, d�brancher le cordon d'alimentation des unit�s en courant alternatif. Warnung Bevor Sie an einem Chassis oder in der N�he von Netzger�ten arbeiten, ziehen Sie bei Wechselstromeinheiten das Netzkabel ab bzw. Avvertenza Prima di lavorare su un telaio o intorno ad alimentatori, scollegare il cavo di alimentazione sulle unit� CA. Advarsel F�r det utf�res arbeid p� kabinettet eller det arbeides i n�rheten av str�mforsyningsenheter, skal str�mledningen trekkes ut p� vekselstr�msenheter. Aviso Antes de trabalhar num chassis, ou antes de trabalhar perto de unidades de fornecimento de energia, desligue o cabo de alimenta��o nas unidades de corrente alternada. �Atenci�n! Antes de manipular el chasis de un equipo o trabajar cerca de una fuente de alimentaci�n, desenchufar el cable de alimentaci�n en los equipos de corriente alterna (CA). Varning! Innan du arbetar med ett chassi eller n�ra str�mf�rs�rjningsenheter skall du f�r v�xelstr�msenheter dra ur n�tsladden.
DC Power Electrical Safety Guidelines
� A DC-powered device is equipped with a DC terminal block that is rated for the power requirements of a maximally configured device.
� For permanently connected equipment, a readily accessible disconnect device shall be incorporated external to the equipment.
� For pluggable equipment, the socket-outlet shall be installed near the equipment and shall be easily accessible.
� Be sure to connect the ground wire or conduit to a solid central office earth ground. � A closed loop ring is recommended for terminating the ground conductor at the ground stud. � Run two wires from the circuit breaker box to a source of 48 VDC.

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� A DC-powered device that is equipped with a DC terminal block is intended only for installation in a restricted-access location. In the United States, a restricted-access area is one in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical Code ANSI/NFPA 70.
NOTE: Primary overcurrent protection is provided by the building circuit breaker. This breaker must protect against excess currents, short circuits, and earth grounding faults in accordance with NEC ANSI/NFPA 70.
� Ensure that the polarity of the DC input wiring is correct. Under certain conditions, connections with reversed polarity might trip the primary circuit breaker or damage the equipment.
� The marked input voltage of �48 VDC for a DC-powered device is the nominal voltage associated with the battery circuit, and any higher voltages are only to be associated with float voltages for the charging function.
� Because the device is a positive ground system, you must connect the positive lead to the terminal labeled RTN, the negative lead to the terminal labeled �48 VDC, and the earth ground to the device grounding points.
DC Power Disconnection Warning
WARNING: Before performing any of the DC power procedures, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the device handle of the circuit breaker in the OFF position. Waarschuwing Voordat u een van de onderstaande procedures uitvoert, dient u te controleren of de stroom naar het gelijkstroom circuit uitgeschakeld is. Om u ervan te verzekeren dat alle stroom UIT is geschakeld, kiest u op het schakelbord de stroomverbreker die het gelijkstroom circuit bedient, draait de stroomverbreker naar de UIT positie en plakt de schakelaarhendel van de stroomverbreker met plakband in de UIT positie vast.
Varoitus Varmista, ett� tasavirtapiiriss� ei ole virtaa ennen seuraavien toimenpiteiden suorittamista. Varmistaaksesi, ett� virta on KATKAISTU t�ysin, paikanna tasavirrasta huolehtivassa kojetaulussa sijaitseva suojakytkin, k��nn� suojakytkin KATKAISTUasentoon ja teippaa suojakytkimen varsi niin, ett� se pysyy KATKAISTU-asennossa.

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Avertissement Avant de pratiquer l'une quelconque des proc�dures ci-dessous, v�rifier que le circuit en courant continu n'est plus sous tension. Pour en �tre s�r, localiser le disjoncteur situ� sur le panneau de service du circuit en courant continu, placer le disjoncteur en position ferm�e (OFF) et, � l'aide d'un ruban adh�sif, bloquer la poign�e du disjoncteur en position OFF.
Warnung Vor Ausf�hrung der folgenden Vorg�nge ist sicherzustellen, da� die Gleichstromschaltung keinen Strom erh�lt. Um sicherzustellen, da� s�mtlicher Strom abgestellt ist, machen Sie auf der Schalttafel den Unterbrecher f�r die Gleichstromschaltung ausfindig, stellen Sie den Unterbrecher auf AUS, und kleben Sie den Schaltergriff des Unterbrechers mit Klebeband in der AUS-Stellung fest.
Avvertenza Prima di svolgere una qualsiasi delle procedure seguenti, verificare che il circuito CC non sia alimentato. Per verificare che tutta l'alimentazione sia scollegata (OFF), individuare l'interruttore automatico sul quadro strumenti che alimenta il circuito CC, mettere l'interruttore in posizione OFF e fissarlo con nastro adesivo in tale posizione.
Advarsel F�r noen av disse prosedyrene utf�res, kontroller at str�mmen er frakoblet likestr�mkretsen. S�rg for at all str�m er sl�tt AV. Dette gj�res ved � lokalisere str�mbryteren p� brytertavlen som betjener likestr�mkretsen, sl� str�mbryteren AV og teipe bryterh�ndtaket p� str�mbryteren i AV-stilling.
Aviso Antes de executar um dos seguintes procedimentos, certifique-se que desligou a fonte de alimenta��o de energia do circuito de corrente cont�nua. Para se assegurar que toda a corrente foi DESLIGADA, localize o disjuntor no painel que serve o circuito de corrente cont�nua e coloque-o na posi��o OFF (Desligado), segurando nessa posi��o a manivela do interruptor do disjuntor com fita isoladora.
�Atenci�n! Antes de proceder con los siguientes pasos, comprobar que la alimentaci�n del circuito de corriente continua (CC) est� cortada (OFF). Para asegurarse de que toda la alimentaci�n est� cortada (OFF), localizar el interruptor autom�tico en el panel que alimenta al circuito de corriente continua, cambiar el interruptor autom�tico a la posici�n de Apagado (OFF), y sujetar con cinta la palanca del interruptor autom�tico en posici�n de Apagado (OFF).
Varning! Innan du utf�r n�gon av f�ljande procedurer m�ste du kontrollera att str�mf�rs�rjningen till likstr�mskretsen �r bruten. Kontrollera att all str�mf�rs�rjning �r BRUTEN genom att sl� AV det �versp�nningsskydd som skyddar likstr�mskretsen och tejpa fast �versp�nningsskyddets omkopplare i FR�N-l�get.

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DC Power Grounding Requirements and Warning
An insulated grounding conductor that is identical in size to the grounded and ungrounded branch circuit supply conductors but is identifiable by green and yellow stripes is installed as part of the branch circuit that supplies the device. The grounding conductor is a separately derived system at the supply transformer or motor generator set.
WARNING: When you install the device, the ground connection must always be made first and disconnected last. Waarschuwing Bij de installatie van het toestel moet de aardverbinding altijd het eerste worden gemaakt en het laatste worden losgemaakt. Varoitus Laitetta asennettaessa on maahan yhdist�minen aina teht�v� ensiksi ja maadoituksen irti kytkeminen viimeiseksi. Avertissement Lors de l'installation de l'appareil, la mise � la terre doit toujours �tre connect�e en premier et d�connect�e en dernier. Warnung Der Erdanschlu� mu� bei der Installation der Einheit immer zuerst hergestellt und zuletzt abgetrennt werden. Avvertenza In fase di installazione dell'unit�, eseguire sempre per primo il collegamento a massa e disconnetterlo per ultimo. Advarsel N�r enheten installeres, m� jordledningen alltid tilkobles f�rst og frakobles sist. Aviso Ao instalar a unidade, a liga��o � terra dever� ser sempre a primeira a ser ligada, e a �ltima a ser desligada. �Atenci�n! Al instalar el equipo, conectar la tierra la primera y desconectarla la �ltima. Varning! Vid installation av enheten m�ste jordledningen alltid anslutas f�rst och kopplas bort sist.
DC Power Wiring Sequence Warning
WARNING: Wire the DC power supply using the appropriate lugs. When connecting power, the proper wiring sequence is ground to ground, +RTN to +RTN, then �48 V to �

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48 V. When disconnecting power, the proper wiring sequence is �48 V to �48 V, +RTN to +RTN, then ground to ground. Note that the ground wire must always be connected first and disconnected last. Waarschuwing De juiste bedradingsvolgorde verbonden is aarde naar aarde, +RTN naar +RTN, en �48 V naar � 48 V. De juiste bedradingsvolgorde losgemaakt is en �48 naar � 48 V, +RTN naar +RTN, aarde naar aarde.
Varoitus Oikea yhdistettava kytkentajarjestys on maajohto maajohtoon, +RTN varten +RTN, �48 V varten � 48 V. Oikea irrotettava kytkentajarjestys on �48 V varten � 48 V, +RTN varten +RTN, maajohto maajohtoon.
Avertissement C�blez l'approvisionnement d'alimentation CC En utilisant les crochets appropri�s � l'extr�mit� de c�blage. En reliant la puissance, l'ordre appropri� de c�blage est rectifi� pour rectifier, +RTN � +RTN, puis �48 V � �48 V. En d�branchant la puissance, l'ordre appropri� de c�blage est �48 V � �48 V, +RTN � +RTN, a alors rectifi� pour rectifier. Notez que le fil de masse devrait toujours �tre reli� d'abord et d�branch� pour la derni�re fois. Notez que le fil de masse devrait toujours �tre reli� d'abord et d�branch� pour la derni�re fois.
Warnung Die Stromzufuhr ist nur mit geeigneten Ring�sen an das DC Netzteil anzuschliessen. Die richtige Anschlusssequenz ist: Erdanschluss zu Erdanschluss, +RTN zu +RTN und dann -48V zu -48V. Die richtige Sequenz zum Abtrennen der Stromversorgung ist -48V zu -48V, +RTN zu +RTN und dann Erdanschluss zu Erdanschluss. Es ist zu beachten dass der Erdanschluss immer zuerst angeschlossen und als letztes abgetrennt wird.
Avvertenza Mostra la morsettiera dell alimentatore CC. Cablare l'alimentatore CC usando i connettori adatti all'estremit� del cablaggio, come illustrato. La corretta sequenza di cablaggio � da massa a massa, da positivo a positivo (da linea ad L) e da negativo a negativo (da neutro a N). Tenere presente che il filo di massa deve sempre venire collegato per primo e scollegato per ultimo.
Advarsel Riktig tilkoples tilkoplingssekvens er jord til jord, +RTN til +RTN, �48 V til � 48 V. Riktig frakoples tilkoplingssekvens er �48 V til � 48 V, +RTN til +RTN, jord til jord.
Aviso Ate con alambre la fuente de potencia cc Usando los terminales apropiados en el extremo del cableado. Al conectar potencia, la secuencia apropiada del cableado se muele para moler, +RTN a +RTN, entonces �48 V a �48 V. Al desconectar potencia, la secuencia apropiada del cableado es �48 V a �48 V, +RTN a +RTN, entonces moli� para moler. Observe que el alambre de tierra se debe conectar siempre primero y desconectar por �ltimo. Observe que el alambre de tierra se debe conectar siempre primero y desconectar por �ltimo.

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�Atenci�n! Wire a fonte de alimenta��o de DC Usando os tal�es apropriados nan EXtremidade da fia��o. Ao conectar a pot�ncia, a seq��ncia apropriada da fia��o � mo�da para moer, +RTN a +RTN, ent�o �48 V a �48 V. Ao desconectar a pot�ncia, a seq��ncia apropriada da fia��o � �48 V a �48 V, +RTN a +RTN, moeu ent�o para moer. Anote que o fio � terra deve sempre ser conectado primeiramente e desconectado por �ltimo. Anote que o fio � terra deve sempre ser conectado primeiramente e desconectado por �ltimo.
Varning! Korrekt kopplingssekvens ar jord till jord, +RTN till +RTN, �48 V till �48 V. Korrekt kopplas kopplingssekvens ar �48 V till �48 V, +RTN till +RTN, jord till jord.
DC Power Wiring Terminations Warning
WARNING: When stranded wiring is required, use approved wiring terminations, such as closed-loop or spade-type with upturned lugs. These terminations must be the appropriate size for the wires and must clamp both the insulation and conductor. Waarschuwing Wanneer geslagen bedrading vereist is, dient u bedrading te gebruiken die voorzien is van goedgekeurde aansluitingspunten, zoals het gesloten-lus type of het grijperschop type waarbij de aansluitpunten omhoog wijzen. Deze aansluitpunten dienen de juiste maat voor de draden te hebben en dienen zowel de isolatie als de geleider vast te klemmen.
Varoitus Jos s�ikeellinen johdin on tarpeen, k�yt� hyv�ksytty� johdinliit�nt��, esimerkiksi suljettua silmukkaa tai kourumaista liit�nt��, jossa on yl�sp�in k��nnetyt kiinnityskorvat. T�llaisten liit�nt�jen tulee olla kooltaan johtimiin sopivia ja niiden tulee puristaa yhteen sek� eristeen ett� johdinosan.
Avertissement Quand des fils torsad�s sont n�cessaires, utiliser des douilles terminales homologu�es telles que celles � circuit ferm� ou du type � plage ouverte avec cosses rebrouss�es. Ces douilles terminales doivent �tre de la taille qui convient aux fils et doivent �tre referm�es sur la gaine isolante et sur le conducteur.
Warnung Wenn Litzenverdrahtung erforderlich ist, sind zugelassene Verdrahtungsabschl�sse, z.B. f�r einen geschlossenen Regelkreis oder gabelf�rmig, mit nach oben gerichteten Kabelschuhen zu verwenden. Diese Abschl�sse sollten die angemessene Gr��e f�r die Dr�hte haben und sowohl die Isolierung als auch den Leiter festklemmen.

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Avvertenza Quando occorre usare trecce, usare connettori omologati, come quelli a occhiello o a forcella con linguette rivolte verso l'alto. I connettori devono avere la misura adatta per il cablaggio e devono serrare sia l'isolante che il conduttore.
Advarsel Hvis det er n�dvendig med flertr�dede ledninger, brukes godkjente ledningsavslutninger, som for eksempel lukket sl�yfe eller spadetype med oppoverb�yde kabelsko. Disse avslutningene skal ha riktig st�rrelse i forhold til ledningene, og skal klemme sammen b�de isolasjonen og lederen.
Aviso Quando forem requeridas montagens de instala��o el�ctrica de cabo torcido, use termina�es de cabo aprovadas, tais como, termina�es de cabo em circuito fechado e planas com terminais de orelha voltados para cima. Estas termina�es de cabo dever�o ser do tamanho apropriado para os respectivos cabos, e dever�o prender simultaneamente o isolamento e o fio condutor.
�Atenci�n! Cuando se necesite hilo trenzado, utilizar terminales para cables homologados, tales como las de tipo "bucle cerrado" o "espada", con las leng�etas de conexi�n vueltas hacia arriba. Estos terminales deber�n ser del tama�o apropiado para los cables que se utilicen, y tendr�n que sujetar tanto el aislante como el conductor.
Varning! N�r flertr�diga ledningar kr�vs m�ste godk�nda ledningskontakter anv�ndas, t.ex. kabelsko av sluten eller �ppen typ med upp�tv�nd tapp. Storleken p� dessa kontakter m�ste vara avpassad till ledningarna och m�ste kunna h�lla b�de isoleringen och ledaren fastkl�mda.
Multiple Power Supplies Disconnection Warning
WARNING: The network device has more than one power supply connection. All connections must be removed completely to remove power from the unit completely. Waarschuwing Deze eenheid heeft meer dan ��n stroomtoevoerverbinding; alle verbindingen moeten volledig worden verwijderd om de stroom van deze eenheid volledig te verwijderen.
Varoitus T�ss� laitteessa on useampia virtal�hdekytkent�j�. Kaikki kytkenn�t on irrotettava kokonaan, jotta virta poistettaisiin t�ysin laitteesta.

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Avertissement Cette unit� est �quip�e de plusieurs raccordements d'alimentation. Pour supprimer tout courant �lectrique de l'unit�, tous les cordons d'alimentation doivent �tre d�branch�s. Warnung Diese Einheit verf�gt �ber mehr als einen Stromanschlu�; um Strom g�nzlich von der Einheit fernzuhalten, m�ssen alle Stromzufuhren abgetrennt sein. Avvertenza Questa unit� ha pi� di una connessione per alimentatore elettrico; tutte le connessioni devono essere completamente rimosse per togliere l'elettricit� dall'unit�. Advarsel Denne enheten har mer enn �n str�mtilkobling. Alle tilkoblinger m� kobles helt fra for � eliminere str�m fra enheten. Aviso Este dispositivo possui mais do que uma conex�o de fonte de alimenta��o de energia; para poder remover a fonte de alimenta��o de energia, dever�o ser desconectadas todas as conex�es existentes. �Atenci�n! Esta unidad tiene m�s de una conexi�n de suministros de alimentaci�n; para eliminar la alimentaci�n por completo, deben desconectarse completamente todas las conexiones. Varning! Denna enhet har mer �n en str�mf�rs�rjningsanslutning; alla anslutningar m�ste vara helt avl�gsnade innan str�mtillf�rseln till enheten �r fullst�ndigt bruten.
TN Power Warning
WARNING: The device is designed to work with a TN power system. Waarschuwing Het apparaat is ontworpen om te functioneren met TN energiesystemen. Varoitus Koje on suunniteltu toimimaan TN-s�hk�voimaj�rjestelmien yhteydess�. Avertissement Ce dispositif a �t� con�u pour fonctionner avec des syst�mes d'alimentation TN. Warnung Das Ger�t ist f�r die Verwendung mit TN-Stromsystemen ausgelegt. Avvertenza Il dispositivo � stato progettato per l'uso con sistemi di alimentazione TN. Advarsel Utstyret er utfomet til bruk med TN-str�msystemer.

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Aviso O dispositivo foi criado para operar com sistemas de corrente TN. �Atenci�n! El equipo est� dise�ado para trabajar con sistemas de alimentaci�n tipo TN. Varning! Enheten �r konstruerad f�r anv�ndning tillsammans med elkraftssystem av TNtyp.
Agency Approvals for EX Series Switches
This topic applies to hardware devices in the EX Series product family, which includes EX Series switches, the EX Series Redundant Power System (RPS), and the XRE200 External Routing Engine. These hardware devices comply with the following standards: � Safety
� CAN/CSA-C22.2 No. 60950-1 Information Technology Equipment � UL 60950-1 Information Technology Equipment � EN 60950-1 Information Technology Equipment � IEC 60950-1 Information Technology Equipment � EN 60825-1 Safety of Laser Products - Part 1: Equipment classification and requirements � EMC � FCC 47CFR Part 15 Class A (USA) � EN 55022 Class A Emissions (Europe) � ICES-003 Class A � VCCI Class A (Japan) � AS/NZS CISPR 22 Class A (Australia/New Zealand) � CISPR 22 Class A � EN 55024 � EN 300386 � EN 61000-3-2 Power Line Harmonics

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� EN 61000-3-3 Voltage Fluctuations and Flicker � EN 61000-4-2 ESD � EN 61000-4-3 Radiated Immunity � EN 61000-4-4 EFT � EN 61000-4-5 Surge � EN 61000-4-6 Low Frequency Common Immunity � EN 61000-4-11 Voltage Dips and Sags
Compliance Statements for EMC Requirements for EX Series Switches
IN THIS SECTION Canada | 181 Taiwan | 181 European Community | 182 Israel | 182 Japan | 182 Korea | 183 United States | 183 FCC Part 15 Statement | 183 Nonregulatory Environmental Standards | 184
This topic applies to hardware devices in the EX Series product family, which includes EX Series switches, the EX Series Redundant Power System (RPS), and the XRE200 External Routing Engine. This topic describes the EMC requirements for these hardware devices.

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Canada
This Class A digital apparatus complies with Canadian ICES-003. Cet appareil num�rique de la classe A est conforme � la norme NMB-003 du Canada. The Industry Canada label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational, and safety requirements. Industry Canada does not guarantee the equipment will operate to the users' satisfaction. Before installing this equipment, users should ensure that it is permissible to connect the equipment to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable method of connection. In some cases, the inside wiring associated with a single line individual service can be extended by means of a certified connector assembly. The customer should be aware that compliance with the above conditions might not prevent degradation of service in some situations. Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, might give the telecommunications company cause to request the user to disconnect the equipment.
CAUTION: Users should not attempt to make electrical ground connections by themselves, but should contact the appropriate inspection authority or an electrician, as appropriate.
Users should ensure for their own protection that the electrical ground connections of the power utility, telephone lines, and internal metallic water pipe system, if present, are connected together. This precaution might be particularly important in rural areas.
Taiwan
The preceding translates as follows: This is a Class A device. In a domestic environment, this device might cause radio interference, in which case the user needs to take adequate measures.

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European Community
This is a Class A device. In a domestic environment this device might cause radio interference, in which case the user needs to take adequate measures.
Israel
The preceding translates as follows: Warning: This product is Class A. In residential environments, the product may cause radio interference, and in such a situation, the user may be required to take adequate measures.
Japan
The preceding translates as follows: This is a Class A device. In a domestic environment this device might cause radio interference, in which case the user needs to take adequate measures. VCCI-A

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Korea
The preceding translates as follows: This equipment is Industrial (Class A) electromagnetic wave suitability equipment and seller or user should take notice of it, and this equipment is to be used in the places except for home
United States
The device has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, might cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users need to correct the interference at their own expense.
FCC Part 15 Statement
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, might cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.

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If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try and correct the interference by one or more of the following measures: � Reorient or relocate the receiving antenna. � Increase the separation between the equipment and the receiver. � Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected. � Consult the dealer or an experienced radio or TV technician for help.
Nonregulatory Environmental Standards
NEBS compliance--These EX Series switches are Network Equipment Building System (NEBS) compliant: � EX2200-24T and EX2200-48T � EX3200-24T, EX3200-48T � EX3300-24T, EX3300-48T � EX4200-24T, EX4200-24F, EX4200-24F-S, EX4200-48T and EX4200-48T-S � EX4300-24T, EX4300-24T-S, EX4300-24P, EX4300-24P-S, EX4300-32F, EX4300-32F-S,
EX4300-48T, EX4300-48T-AFI, EX4300-48T-S, EX4300-48P, and EX4300-48P-S � All EX4500 switches with AC power supplies � EX4550-32T-AFO, EX4550-32T-AFI, EX4550-32F-AFO, EX4550-32F-AFI, and EX4550-32F-S � EX4600-40F and EX4600-40F-S � All EX6200 switches
NOTE: For the EX6200-48P line cards, the intrabuilding ports must use shielded intrabuilding cabling or wiring that is grounded at both ends.
� All EX8200 switches � EX9251 � EX9253

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These switches meet the following NEBS compliance standards: � SR-3580 NEBS Criteria Levels (Level 4 Compliance) � GR-1089-CORE: EMC and Electrical Safety for Network Telecommunications Equipment � GR-63-CORE: NEBS, Physical Protection
� The equipment is suitable for installation as part of the Common Bonding Network (CBN). � The equipment is suitable for installation in locations where the National Electrical Code (NEC)
applies. � The battery return connection is to be treated as an Isolated DC return (DC-I), as defined in
GR-1089-CORE. � You must provision a readily accessible device outside of the equipment to disconnect power. The
device must also be rated based on local electrical code practice.
Compliance Statements for Acoustic Noise for EX Series Switches
This topic applies to hardware devices in the EX Series product family, which includes EX Series switches, the EX Series Redundant Power System (RPS), and the XRE200 External Routing Engine. Maschinenl�rminformations-Verordnung - 3. GPSGV, der h�chste Schalldruckpegel betr�gt 70 dB(A) oder weniger gem�ss EN ISO 7779 Translation: The emitted sound pressure is below 70 dB(A) per EN ISO 7779.
Statements of Volatility for Juniper Network Devices
A statement of volatility (SoV)--sometimes known as letter of volatility (LoV)--identifies the volatile and non-volatile storage components in Juniper Networks devices, and describes how to remove nonvolatile storage components from the device.

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NOTE: Individual FRUs do not have separate SoV or LoV documents. They are covered in the SoV or LoV of the Juniper Networks device in which they are installed.
NOTE: Statements of volatility are not available for all Juniper Networks devices.
CTP Series: � CTP150 � CTP2000 EX Series: � EX2200 and EX2200-C � EX2300-24P, EX2300-24T, and EX2300-24T-DC � EX2300-48P and EX2300-48T � EX2300-C � EX3300 � EX3400-24P, EX3400-24T, EX3400-24T-DC � EX3400-48P, EX3400-48T, EX3400-48T-AFI � EX4200 � EX4300 � EX4300-48MP � EX4400
1. EX4400-24T 2. EX4400-24P 3. EX4400-24MP 4. EX4400-48T 5. EX4400-48P

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6. EX4400-48MP 7. EX4400-48F � EX4500 � EX4550 � EX4600 � EX8200 � EX9251 � EX9253 � XRE200 External Routing Engine LN Series: � LN1000�CC MX Series: � M7i � M7i Compact Forwarding Engine Board (CFEB) � M40e and M10i � M320 � MX5, MX10, MX40, and MX80 � MX104 � MX204 � MX240, MX480, and MX960 � MX10003 � RE-A-2000 Route Engine � RE-S-X6-64G Routing Engine QFX Series: � QFX3008-I � QFX3100

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� QFX3500 � QFX3600 � QFX5100-24Q � QFX5100-48S � QFX5100-48T � QFX5110-32Q � QFX5110-48S � QFX5200 � QFX5200-32C � QFX10008 and QFX10016 SRX Series: � SRX100 � SRX110 � SRX210B � SRX210H-POE � SRX210H-P-MGW � SRX220 � SRX240H � SRX240H-POE � SRX300 � SRX320 � SRX340 and SRX345 � SRX550 � SRX650 � SRX1400 � SRX1500

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� SRX3400 and SRX3600 � SRX4200 � SRX4600 � SRX5400, SRX5600, and SRX5800 � SRX-MP-1SERIAL � SSG-520M T Series: � RE-A-2000 Route Engine