Enterasys Networks Vertical Horizon Vh 8Tx1Mf Users Manual Ug

VH-8TX1MF to the manual 9679ea38-d6f4-4914-55ed-870357cac84a

2015-02-04

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9033718-01
VERTICAL HORIZON
VH-8TX1UM/VH-8TX1MF
FAST ETHERNET SWITCH
USER GUIDE
Notice
9033718-01 iii
NOTICE
Enterasys Networks reserves the right to make changes in specifications and other information
contained in this document without prior notice. The reader should in all cases consult Enterasys
Networks to determine whether any such changes have been made.
The hardware, firmware, or software described in this manual is subject to change without notice.
IN NO EVENT SHALL ENTERASYS NETWORKS BE LIABLE FOR ANY INCIDENTAL,
INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT
NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR
THE INFORMATION CONTAINED IN IT, EVEN IF ENTERASYS NETWORKS HAS BEEN
ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH
DAMAGES.
2001 by Enterasys Networks, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in Taiwan, R.O.C.
Order Number: 9033718-01 September 2001
Enterasys, Enterasys Networks, and Vertical Horizon are trademarks or registered trademarks of
Enterasys Networks, Inc.
Microsoft, Windows, Windows 95, Windows 98, and Windows NT are either trademarks or registered
trademarks of Microsoft Corporation.
Netscape and Netscape Navigator are trademarks of Netscape Communications Corporation.
All other product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies.
WARNING: Only qualified personnel should perform installation
procedures.
Notice
iv 9033718-01
FCC NOTICE
This device complies with Part 15 of the FCC rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
NOTE: 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 when the equipment is operated in a commercial environment.
This equipment uses, generates, and can radiate radio frequency energy and if not installed in
accordance with the operator’s manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause interference in which case the user
will be required to correct the interference at his own expense.
WARNING: Changes or modifications made to this device which are not expressly approved by the
party responsible for compliance could void the user’s authority to operate the equipment.
INDUSTRY CANADA NOTICE
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables
aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique
édicté par le ministère des Communications du Canada.
VCCI NOTICE
This is a Class A product based on the standard of the Voluntary Control Council for Interference by
Information Technology Equipment (VCCI). If this equipment is used in a domestic environment,
radio disturbance may arise. When such trouble occurs, the user may be required to take corrective
actions.
SAFETY INFORMATION
CLASS 1 LASER TRANSCEIVERS
The VH-8TX1UM-port switch uses Class 1 Laser transceivers. Read the following safety information
before installing or operating these modules.
Class 1 laser transceivers use an optical feedback loop to maintain Class 1 operation limits. This
control loop eliminates the need for maintenance checks or adjustments. The output is factory set, and
does not allow any user adjustment. Class 1 Laser transceivers comply with the following safety
standards:
Notice
9033718-01 v
• 21 CFR 1040.10 and 1040.11 U.S. Department of Health and Human Services (FDA).
• IEC Publication 825 (International Electrotechnical Commission).
• CENELEC EN 60825 (European Committee for Electrotechnical Standardization).
• When operating within their performance limitations, laser transceiver output meets the Class 1
accessible emission limit of all three standards. Class 1 levels of laser radiation are not considered
hazardous.
SAFETY INFORMATION
CLASS 1 LASER TRANSCEIVERS
LASER RADIATION AND CONNECTORS
When the connector is in place, all laser radiation remains within the fiber. The maximum amount of
radiant power exiting the fiber (under normal conditions) is -12.6 dBm or 55 x 10-6 watts.
Removing the optical connector from the transceiver allows laser radiation to emit directly from the
optical port. The maximum radiance from the optical port (under worst case conditions) is 0.8 W cm-2
or 8 x 103 W m2 sr-1.
Do not use optical instruments to view the laser output. The use of optical instruments to view laser
output increases eye hazard. When viewing the output optical port, power must be removed from the
switch.
WARNING: FIBER OPTIC PORT SAFETY
AVERTISSMENT: PORTS POUR FIBRES OPTIQUES -
SÉCURITÉ SUR LE PLAN OPTIQUE
WARNHINWEIS: FASEROPTIKANSCHLÜSSE -
OPTISCHE SICHERHEIT
When using a fiber optic port, never look at the transmit laser while it is
powered on. Also, never look directly at the fiber TX port and fiber cable
ends when they are powered on.
Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez jamais
directement le port TX (Transmission) à fibres optiques et les embouts de
câbles à fibres optiques tant qu'ils sont sous tension.
Niemals ein Übertragungslaser betrachten, während dieses eingeschaltet ist.
Niemals direkt auf den Faser-TX-Anschluß und auf die Faserkabelenden
schauen, während diese eingeschaltet sind.
Notice
vi 9033718-01
SAFETY INFORMATION
WICHTIGE SICHERHEITSHINWEISE (GERMANY)
1. Bitte lesen Sie diese Hinweise sorgfältig durch.
2. Heben Sie diese Anleitung für den späteren Gebrauch auf.
3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie keine Flüssigoder
Aerosolreiniger. Am besten eignet sich ein angefeuchtetes Tuch zur Reinigung.
4. Die Netzanschlu ßsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.
5. Das Gerät ist vor Feuchtigkeit zu schützen.
6. Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder Fallen
könnte Beschädigungen hervorrufen.
7. Die Belüftungsöffnungen dienen der Luftzirkulation, die das Gerät vor Überhitzung schützt.
Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.
8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.
9. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollte auch nichts
auf der Leitung abgestellt werden.
10. Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.
11. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz
trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.
12. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät
gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.
13. Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur von
authorisiertem Servicepersonal geöffnet werden.
14. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer
qualifizierten Servicestelle zu überprüfen:
a. Netzkabel oder Netzstecker sind beschädigt.
b. Flüssigkeit ist in das Gerät eingedrungen.
c. Das Gerät war Feuchtigkeit ausgesetzt.
d. Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert oder Sie mit Hilfe
dieser Anleitung keine Verbesserung erzielen.
e. Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f. Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
15. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden. Für einen Nennstrom
bis 6A und einem Gerätegewicht größer 3kg ist eine Leitung nicht leichter als H05VV-F, 3G,
0.75mm2 einzusetzen.
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70dB(A) oder
weniger.
Notice
9033718-01 vii
ENTERASYS NETWORKS, INC.
PROGRAM LICENSE AGREEMENT
BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,
CAREFULLY READ THIS LICENSE AGREEMENT.
This document is an agreement (“Agreement”) between You, the end user, and Enterasys Networks,
Inc. (“Enterasys”) that sets forth your rights and obligations with respect to the Enterasys software
program (“Program”) in the package. The Program may be contained in firmware, chips or other
media. UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME BOUND
BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND THE
LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT AGREE
TO THE TERMS OF THIS AGREEMENT, RETURN THE UNOPENED PRODUCT TO
ENTERASYS OR YOUR DEALER, IF ANY, WITHIN TEN (10) DAYS FOLLOWING THE DATE
OF RECEIPT FOR A FULL REFUND.
IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT ENTERASYS
NETWORKS (603) 332-9400. Attn: Legal Department.
1. LICENSE. You have the right to use only the one (1) copy of the Program provided in this
package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the United States or as authorized in writing by Enterasys.
2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.
3. APPLICABLE LAW. This License Agreement shall be interpreted and governed under the
laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and
venue of the New Hampshire courts.
4. EXPORT REQUIREMENTS. You understand that Enterasys and its Affiliates are subject to
regulation by agencies of the U.S. Government, including the U.S. Department of Commerce, which
prohibit export or diversion of certain technical products to certain countries, unless a license to
export the product is obtained from the U.S. Government or an exception from obtaining such license
may be relied upon by the exporting party.
If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Administration Regulations, You agree that You are a civil end user of the Program
and agree that You will use the Program for civil end uses only and not for military purposes.
If the Program is exported from the United States pursuant to the License Exception TSR under
the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in
Sections 1 or 2 of this Agreement, You agree not to (i) reexport or release the Program, the source
code for the Program or technology to a national of a country in Country Groups D:1 or E:2 (Albania,
Armenia, Azerbaijan, Belarus, Bulgaria, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan,
Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, Uzbekistan, Vietnam, or such other
countries as may be designated by the United States Government), (ii) export to Country Groups D:1
or E:2 (as defined herein) the direct product of the Program or the technology, if such foreign
produced direct product is subject to national security controls as identified on the U.S. Commerce
Control List, or (iii) if the direct product of the technology is a complete plant or any major
component of a plant, export to Country Groups D:1 or E:2 the direct product of the plant or a major
component thereof, if such foreign produced direct product is subject to national security controls as
identified on the U.S. Commerce Control List or is subject to State Department controls under the
U.S. Munitions List.
Notice
viii 9033718-01
5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i) was
developed solely at private expense; (ii) contains “restricted computer software” submitted with
restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer
Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary data
belonging to Enterasys and/or its suppliers. For Department of Defense units, the Product is
considered commercial computer software in accordance with DFARS section 227.7202-3 and its
successors, and use, duplication, or disclosure by the Government is subject to restrictions set forth
herein.
6. EXCLUSION OF WARRANTY. Except as may be specifically provided by Enterasys in
writing, Enterasys makes no warranty, expressed or implied, concerning the Program (including its
documentation and media).
ENTERASYS DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO
YOU BY ENTERASYS IN WRITING, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING
WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.
7. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL
ENTERASYS OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER
(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS,
BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL,
CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS) ARISING OUT OF THE
USE OR INABILITY TO USE THIS ENTERASYS PRODUCT, EVEN IF ENTERASYS HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO
NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED
WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY
NOT APPLY TO YOU.
Notice
9033718-01 ix
DECLARATION OF CONFORMITY
Application of Council Directive(s): 89/336/EEC
73/23/EEC
Manufacturer’s Name: Enterasys Networks, Inc.
Manufacturer’s Address: 35 Industrial Way
PO Box 5005
Rochester, NH 03867
European Representative Name: Mr. J. Sims
European Representative Address: Enterasys Networks Limited
Nexus House, Newbury Business Park
London Road, Newbury
Berkshire RG14 2PZ, England
Conformance to Directive(s)/Product Standards: EC Directive 89/336/EEC
EC Directive 73/23/EEC
EN 55022
EN 55024
EN 60950
Equipment Type/Environment: Networking Equipment, for use in a
Commercial or Light Industrial
Environment.
We the undersigned, hereby declare, under our sole responsibility, that the equipment packaged
with this notice conforms to the above directives.
Manufacturer Legal Representative in Europe
Mr. Thomas Whissel Mr. J. Sims
___________________________________ ___________________________________
Full Name Full Name
Compliance Engineering Manager Managing Director - E.M.E.A.
___________________________________ ___________________________________
Title Title
Rochester, NH, USA Newbury, Berkshire, England
___________________________________ ___________________________________
Location Location
Notice
x9033718-01
9033718 Table of Contents xi
TABLE OF CONTENTS
PREFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XIII
Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Message Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii
Keyboard Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Other Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv
Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv
1. PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Feature Summaries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
IEEE 802.1D Bridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Spanning Tree Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Frame Buffering and Frame Latency . . . . . . . . . . . . . . . . . . . . . . . . 5
Software Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Non-Volatile Parameter Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Configuration and Management Interfaces . . . . . . . . . . . . . . . . . . . 5
RMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Port Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Auto-negotiation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Multicast Filtering. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Port Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Broadcast Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Configuration Upload/Download . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
BootP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Full-Duplex Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Flow Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Virtual LANs (VLANs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Class of Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Port Trunking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Application Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Client/Server Network Application . . . . . . . . . . . . . . . . . . . . . . . . . 12
Local Backbone Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Inspecting Your Shipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mounting the Switch on a Table or Shelf . . . . . . . . . . . . . . . . . . . . . . . 16
Mounting the Switch in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connecting a Terminal to the Console Port . . . . . . . . . . . . . . . . . . . . . 18
xii Table of Contents VH-8TX1MF
Console Port (Out-of-Band) Connections . . . . . . . . . . . . . . . . . . . 18
Remote Management via the Console Port . . . . . . . . . . . . . . . . . 19
In-Band Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Powering the Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Network Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Fiber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
10Base-T/100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
100Base-FX Fiber Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
APPENDIX A. TECHNICAL SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . 25
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Regulatory Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Data Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10Base-T and 100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . 27
MDI/MDI-X Crossover Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . 28
Power Cord Set Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Country-Specific Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 29
APPENDIX B. FLOW CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
APPENDIX C. ACRONYMS & ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . 33
INDEX
9033718-01 Preface xiii
PREFACE
Purpose
This guide provides information about the features and applications of the
Enterasys Networks Vertical Horizon VH-8TX1UM/VH-8TX1MF switch
system.
Audience
This guide is intended for Ethernet Local Area Network (LAN)
administrators and Management Information Systems (MIS) personnel
with the following background:
•Working knowledge of Ethernet LANs
•Familiarity with Transmission Control Protocol/Internet Protocol
(TCP/IP) and Simple Network Management Protocol (SNMP)
Conventions
This section describes the conventions used in this guide.
Message Formats
Two types of messages, identified by icons, appear in the text:
Keyboard Entries
This guide uses the following conventions for keyboard entries:
•When you read “enter,” type the text and press the [Enter] key.
•Example: Enter the Gateway IP address and press the [Enter] key.
•When you read “select,” highlight the menu item and press the [Enter]
key.
A note informs you of special circumstances.
A caution indicates the possibility of equipment damage.
xiv Preface VH-8TX1UM/VH-8TX1MF
Other Conventions
This guide uses the following typographical conventions:
•Initial Caps Menu titles and console menu selections.
•[Enter] Used to designate the Enter or Return key.
•courier font Screen messages and user prompts.
•Selection Describes a user-configurable user interface item.
•Field Describes a read-only information item.
Organization
Chapter 1. Product Overview: Describes the features of the switch, front
and rear panel components and application examples.
Chapter 2. Installation: Describes the content of your switch shipment,
lists site requirements, and provides mounting instructions. Instructions
for making connections and powering up the switch are provided as well.
Appendix A. Technical Specifications: Provides a list of standards
compliance and certifications as well as physical and operational
specifications.
Appendix B. Flow Control: Describes how the flow control features are
used to provide a mechanism for protecting the switch from overload
conditions and to keep additional traffic off the network.
Appendix C. Acronyms and Abbreviations: Provides definitions for a
list of common acronyms and abbreviations used within the installation
guide and the networking industry.
9033718-01 Product Overview 1
1. PRODUCT OVERVIEW
This chapter provides the following information:
•Product Description
•Features
•Front and Rear Panel Component Descriptions
•Feature Summaries
•Application Example
Description
This installation guide describes Enterasys Networks’ Vertical Horizon
VH-8TX1UM/VH-8TX1MF Fast Ethernet switch. The switch provides 7
fixed 10Base-T/100Base-TX ports, plus an eighth port which can be
selected between 10/100Base-TX and 100 Base-FX multi-mode or
single-mode fiber. There is also a fixed SNMP-based management card
included in the switch. This management card supports both in-band and
out-of-band access for managing the switch.
The switch employs a high-speed switching fabric. This design allows for
simultaneous transport of multiple packets at low latency on all ports. It
also uses store-and-forward switching to ensure maximum data integrity.
In this mode, the entire packet must be received into a port buffer and
checked for validity before being forwarded. This prevents errors from
being propagated throughout the network. This switch also features
full duplex capability on all ports, which effectively doubles the bandwidth
of each connection.
The switch can connect up to 8 end-node workstations or servers using
its 10/100Base-TX ports. Moreover, you can use the 100Base-FX fiber
port for connecting to a remote site.
The RMON/SNMP/Web management card provides a broad range of
management options. It includes a standards-compliant Simple Network
Management Protocol (SNMP) agent. The SNMP agent allows network
management station applications to collect and present status and
performance information about the switch, as well as providing the ability
to configure and control functions in the switch. The management card
also supports Remote Monitoring (RMON) for Statistics, History, Alarm
and Event groups (Groups 1-3, 9).
Network management can be performed in-band using a TCP/IP or Telnet
connection to the switch.
This card also includes a built-in Web agent that
provides management
access via common http browsers such as
Netscape Navigator and Microsoft’s Internet Explorer. In addition, the
console port allows out-of-band management using a PC, terminal, or
modem connection.
2 Product Overview VH-8TX1UM/VH-8TX1MF
The VH-8TX1UM/VH-8TX1MF switch is desktop mountable. LEDs on the
front panel provide information about the operating status of the switch.
The rear panel contains the power connector and serial console port.
Features
•Ports:
- 7 fixed dual-speed 10/100Base-TX ports using RJ-45
connectors (MDI-X)
- 1 port which can be selected between dual-speed
10/100Base-TX and 100Base-FX multi-mode or single-mode
fiber
- 1 serial console port
•Switch Architecture:
- 1 controller with 8 10/100 ports
- IEEE 802.3u auto-negotiation of half/full-duplex operation on
all RJ-45 ports
- 128 KB packet buffering for 10/100 ports
- Store-and-forward switching
- 8K address forwarding table
- Forwarding: 14,880 packets-per-second (64 byte packets)
@10 Mbps; 148,800 pps @100 Mbps; 1,488,000 pps
- Filtering: 14,880 packets-per-second (64 byte packets) @10
Mbps; 148,800 pps @100 Mbps; 1,488,000 pps
- SNMP compliant agent: MIB II (RFC 1213); Bridge MIB
(RFC 1493); Ethernet-like MIB (RFC 1643); RMON - Statistics,
History, Alarm and Event groups (RFC 1757); Interface
Evolution MIB (RFC 1573); Q-MIB (IEEE 802.1Q); private MIB
extensions
- Access via in-band, Internet browser, or Telnet
- Console port (RS-232, male DB-9 connector) supports access
via direct or modem connection
- BootP for IP address configuration
•Software:
- Diagnostics for product testing and troubleshooting
- Firmware upgrades using the console port or in-band with
TFTP
•LED Indicators:
-System: Power
- 10Base-T/100Base-TX ports: link/speed/disable,
mode (flow control, full duplex, activity)
9033718-01 Product Overview 3
Front Panel
Figure 1-1 shows the front panel of the Enterasys Networks Vertical
Horizon VH-8TX1UM/VH-8TX1MF. Table 1-1 defines the VH-8TX1UM/
VH-8TX1MF front-panel components.
Figure 1-1. VH-8TX1MF Front Panel
Table 1-1. Front Panel Components
* The 100Base-FX port is a single-mode fiber (SMF) port on the VH-8TX1UM and a
multi-mode fiber (MMF) port on the VH-8TX1MF.
Name Function
PWR LED On indicates power is supplied to the switch. Off
indicates no power is supplied to the switch.
Link LED’s Green indicates that there is a 100 Mbps link, and the
port is enabled. Flashing green indicates that there is a
100 Mbps link, and port activity. Amber indicates that
there is a 10 Mbps link, and the port is enabled.
Flashing amber indicates that there is a 10 Mbps link,
and port activity. Off indicates that there is no link.
FDX LED’s Green indicates that the switch is operating in full-
duplex mode. Off indicates that the switch is operating
in half-duplex mode.
TX/FX Button When using Port 8, use this toggle switch to select the
RJ-45 connector or fiber connector. Note that every
time you change the Port 8 connector, you must also
reset the switch.
10Base-T/100Base-TX
RJ-45 Ports (Ports 1 - 8)
Copper ports using RJ-45 port connectors. All the ports
are wired MDI-X.
100Base-FXPort (Port 8)* A fiber port using SC connectors for uplink. When
using the fiber port, use the TX/FX button to select the
fiber connector.
Port Status Indicators
10/100M RJ-45 Ports 100M SC Ports
TX/FX Button
4 Product Overview VH-8TX1UM/VH-8TX1MF
Rear Panel
Figure 1-2 shows the VH-8TX1UM/VH-8TX1MF rear panel and Table 1-
2 defines the rear panel components.
Figure 1-2. VH-8TX1UM/VH-8TX1MF Rear Panel
Table 1-2. Rear Panel Components
Feature Summaries
The following summaries describe VH-8TX1UM/VH-8TX1MF features in
areas such as standards compliance, functionality, performance, and
options.
IEEE 802.1D Bridge
The VH-8TX1UM/VH-8TX1MF switch is fully compliant with IEEE 802.1D
transparent bridging specifications. An address table is provided for
learning, filtering, and forwarding. The switch can support up to a
maximum of 8K addresses. Addresses are automatically learned by the
switch, and can be individually assigned specific forwarding treatment by
the network administrator if desired. Forwarding table configuration can
be made
out-of-band via the console interface or in-band via SNMP or Telnet.
Static and dynamic addresses are both stored in this table. One static
address is assigned per port by default. The Static Unicast Address Table
Configuration screen in the console menus allows you to assign additional
static addresses if required.
Spanning Tree Protocol
The VH-8TX1UM/VH-8TX1MF switch supports the IEEE 802.1D
Spanning Tree Protocol. This protocol allows redundant connections to
be created between different LAN segments for purposes of fault
tolerance. Two or more physical paths between different segments can be
created through the switch, with the Spanning Tree Protocol choosing a
single path at any given time and disabling all others. If the chosen path
Name Function
Power Connector Provides AC power to the switch.
Console Port Male DB-9 connector configured as a standard RS-232
connection for serial out-of-band management using the
console menus.
9033718-01 Product Overview 5
fails for any reason, a disabled alternative is activated, thereby
maintaining the connection. This prevents network traffic from circulating
in an endless loop formed by multiple connections to the same LAN
segment.
Spanning Tree parameters are configurable using the Spanning Tree
Configuration Menu of the console menus, the on-board Web agent, or
via SNMP (see Appendix B, “Spanning Tree Concepts,” in the
Management Guide for more information).
Frame Buffering and Frame Latency
The VH-8TX1UM/VH-8TX1MF switch is a store-and-forward switching
device. Each frame is copied into switch memory before being forwarded
to another port. This method ensures that all forwarded frames conform
to a standard Ethernet frame size and have a correct cyclic redundancy
check (CRC) for data integrity. This switching method prevents bad
frames from traversing the network and using up valuable network
bandwidth, as with cut-through switching technology.
To minimize the possibility of dropping frames on congested ports, the
VH-8TX1UM/VH-8TX1MF switch provides 128 KB of frame buffering per
port. This buffer space is used to queue packets for transmission on
congested networks. This is an additional advantage over cut-through
switching technology, which drops packets immediately when
experiencing collisions.
Software Download
The VH-8TX1UM/VH-8TX1MF switch supports the industry-standard
Trivial File Transfer Protocol (TFTP) for downloading software to the
switch. All switch software is stored in a 2 MB sectored flash ROM. The
download feature allows you to easily install software upgrades to the
unit. Software can alternatively be downloaded via the serial console port
using the XMODEM protocol.
A TFTP software download is invoked via the Management Setup Menu
using the console menus. A TFTP download can also be invoked using
the on-board Web agent or via SNMP.
Non-Volatile Parameter Storage
Important operating parameters such as IP addresses, Spanning Tree
configuration, and management security parameters, are stored in non-
volatile flash memory. These values are retained when the switch
experiences power interruptions or is powered down for normal
maintenance.
Configuration and Management Interfaces
The VH-8TX1UM/VH-8TX1MF switch can be managed using any of the
following methods:
•Serial console, out-of-band
6 Product Overview VH-8TX1UM/VH-8TX1MF
An RS-232 connection, using a DB-9 connector, is included on the
rear panel for system management. Serial console management can
be performed out-of-band using a terminal or computer running
communications software. You can connect directly to the RS-232
port on the rear panel, or make a connection via a modem. See the
Management Guide for information on managing the VH-8TX1UM/
VH-8TX1MF switch via the serial console.
•Telnet, in-band (over Ethernet)
The switch supports management through a Telnet connection using
the TCP/IP protocols. Telnet is performed using a terminal or
computer running communications software. See the Management
Guide for information on managing the system via Telnet. Global
user name and password protection for changing the operating
parameters of the switch is provided.
•Web-based network manager, in-band
The system can be managed over HTTP protocol with a Web
browser (Internet Explorer 4.0 or above, or Netscape Navigator 4.0
or above). Standard agent MIBs embedded in the switch provide
basic SNMP management through an embedded graphic interface.
•SNMP-based network manager, in-band
The system can also be managed using SNMP, the most common
protocol used today for network management. Standard agent MIBs
embedded in the switch provide basic SNMP management through
industry-standard SNMP applications.
Management security protection is provided based on SNMP
community names. See Chapter 4, “SNMP Management,” in the
Management Guide for more information.
RMON
RMON (Remote Monitoring) is a facility used to manage networks
remotely while providing multi-vendor interoperability between monitoring
devices and management stations. RMON is defined by an SNMP MIB.
This MIB is divided into nine different groups, each gathering specific
statistical information or performing a specific function. RMON-capable
devices gather network traffic data and then store them locally until
downloaded to an SNMP management station.
The VH-8TX1UM/VH-8TX1MF supports four of the nine groups of RMON
defined for Ethernet networks on a per segment basis. Specifically, these
are:
•Statistics: a function that maintains counts of network traffic statistics
such as number of packets, broadcasts, collisions, errors, and
distribution of packet sizes.
•History: a function that collects historical statistics based on user-
defined sampling intervals. The statistical information collected is the
same as the Statistics group, except on a time stamped basis.
•Alarm: a function that allows managers to set alarm thresholds based
on traffic statistics. Alarms trigger other actions through the Event
group.
9033718-01 Product Overview 7
•Event: a function that operates with the Alarm group to define an
action that will be taken when an alarm condition occurs. The event
may write a log entry and/or send a trap message.
Note that RMON statistics and other information can only be viewed using
a connection to the on-board Web agent or via other compatible SNMP
management applications.
Port Mirroring
The VH-8TX1UM/VH-8TX1MF switch includes the ability to mirror the
traffic being switched on any port for purposes of network traffic analysis
and connection integrity. When this feature is enabled, a protocol
analyzer or RMON probe can be connected to the mirror port. You can
only mirror one port to another port at one time. Port mirroring occurs at
the same speed configured for the port (10 Mbps-to-10 Mbps or 100
Mbps-to-100 Mbps). Port mirroring is configurable using the console
interface menus, the
on-board Web agent, or via SNMP.
Auto-negotiation
Auto-negotiation is a process that permits the switch to automatically
select the operational modes of its 10/100 RJ-45 ports. Upon first being
connected, the switch detects the speed of the network the port is
connected to, either 10 Mbps or 100 Mbps, and the type of
communication setting, half or full duplex. The port is then automatically
set by the switch to operate in the proper mode, without user intervention.
It is not required that the network device being connected to the switch
supports auto-negotiation as the VH-8TX1UM/VH-8TX1MF switch
automatically adjusts to the network device’s communication settings.
Auto-negotiation is configurable using the console interface menus, the
on-board Web agent, or via SNMP.
Multicast Filtering
The purpose of IP multicast filtering is to optimize a switched network’s
performance, so multicast packets will only be forwarded to those ports
containing multicast group hosts or multicast routers/switches, instead of
flooding traffic to all ports. The VH-8TX1UM/VH-8TX1MF supports IP
multicast filtering not only by passively monitoring IGMP Query and
Report messages, but also by actively sending Query messages to learn
the location of multicast routers/switches and member hosts in multicast
groups. IGMP is configurable using the console interface menus, the on-
board Web agent, or via SNMP.
Port Security
Port security protects your network from unauthorized users by
preventing their connected devices gaining access to the network. The
port security feature allows each port to learn, or be configured with, a list
of MAC addresses of devices that are authorized to access the network
through that port. Packets received on the port that have a source MAC
8 Product Overview VH-8TX1UM/VH-8TX1MF
address that matches one in the authorized list will be forwarded, all other
packets will be dropped. Note that port security is disabled on all ports by
default, but can be enabled on a per-port basis by using the console
interface menus, the on-board Web agent, or via SNMP.
Broadcast Suppression
Broadcast suppression is a system that prevents a high level of broadcast
traffic from overwhelming the network. When enabled on a port, the
system monitors the level of broadcast traffic that passes through the port.
If the broadcast traffic level rises above a pre-defined packet-per-second
threshold, a broadcast-control mechanism will be employed. This
mechanism limits the amount of broadcasts passed by the port to half of
the received packet-per-second count. The control mechanism remains in
effect until the number of received broadcasts falls back below the packet-
per-second threshold. Broadcast suppression operation is configurable
using the console interface menus, the on-board Web agent, or via
SNMP.
Configuration Upload/Download
The VH-8TX1UM/VH-8TX1MF includes the ability to save the current
configuration settings to a file on a TFTP server. The file can be later
downloaded to the module to restore the switch configuration settings.
The configuration save and restore feature is available using the console
interface menus, the on-board Web agent, or via SNMP.
BootP
The Bootstrap Protocol (BootP) provides for the capability of passing
configuration information to hosts on a TCP/IP network. Using this
process, network devices do not need to be configured before they can
communicate using the TCP/IP protocol suite. The VH-8TX1UM/VH-
8TX1MF switch uses BootP to automatically configure IP address
information without requiring access to the console menus. BootP
operation is configurable using the console interface menus, the on-board
Web agent, or via SNMP.
Full-Duplex Mode
The full-duplex mode of operation on a port can double the throughput of
switch connections. This mode disables the collision detection portion of
the Ethernet Carrier Sense Multiple Access with Collision Detection
(CSMA/CD) protocol, allowing for two-way traffic. Full duplex is
configurable using the console interface menus, the on-board Web agent,
or via SNMP.
Flow Control
Flow control allows you to manage network traffic during congestion
periods and to prevent the loss of packets when port buffer thresholds are
exceeded. Flow control also serves to deny access to additional traffic
9033718-01 Product Overview 9
that could add to a congestion condition. The VH-8TX1UM/VH-8TX1MF
switch supports flow control per the IEEE 802.3x standard. Note that flow
control is disabled on all ports by default but can be enabled on a per-port
basis by using the console interface menus, the on-board Web agent, or
via SNMP. See Appendix B, “Flow Control,” for more information on this
feature.
Virtual LANs (VLANs)
VLANs allow you to connect users to a specific LAN segment regardless
of their physical location. The VH-8TX1UM/VH-8TX1MF switch supports
tagged VLANs per the IEEE 802.1Q draft standard. With frame tagging,
a short tag is appended to every frame that crosses the network
backbone. The tag identifies which VLAN the frame belongs to. See
Appendix B, “Virtual LANs,” in the Management Guide for more
information.
Class of Service
Class of Service support allows you to assign a higher priority to selected
traffic passing through the switch. The VH-8TX1UM/VH-8TX1MF switch
supports Class of Service attributes per the IEEE 802.1p standard using
a priority queuing mechanism. This feature ensures that traffic during
congestion periods will not interfere with traffic assigned a higher priority.
Traffic assigned a lower priority is subject to discard when memory is in
short supply. See Appendix C, “Class of Service,” in the Management
Guide for more information.
Port Trunking
Port trunking allows you to combine ports into an aggregate connection
between VH-8TX1UM/VH-8TX1MF switches. Besides balancing the load
across each port in the trunk, the additional ports provide redundancy by
taking over the load if a port in the trunk should fail. The VH-8TX1UM/VH-
8TX1MF allows up to four RJ-45 ports to be joined together as a trunk.
The switch supports only one trunk group per unit.
NOTE: If flow control is desired for one port, it is recommend-
ed that it be enabled on all ports. However, note that flow con-
trol should not be used if a port is connected to a hub. Also, be
aware that when interconnecting high-speed LANs (such as
Gigabit Ethernet) and low-speed LANs, flow control can cause
traffic from the high-speed LAN to be blocked for all other
ports on the switch.
10 Product Overview VH-8TX1UM/VH-8TX1MF
Factory Defaults
Table 1-3 lists the default settings for switch configuration parameters.
Each parameter can be changed via the console menus or Telnet.
Table 1-3. Factory Default Settings
Parameter Default Value
Multicast Filtering
GMRP Disabled
IGMP Multicast Filtering Disabled
Port Configuration
Flow Control Disabled
Speed and Duplex Auto
Admin Enabled
Broadcast Storm Control Enabled - 500 pps
Port Priority
Default Ingress User Priority 0
Spanning Tree Algorithm
Active Aging Time 100
Bridge Priority 32768
Forward Delay 15
Hello Time 2
Max Age 20
Path Cost 19 - 100 Mbps ports
100 - 10 Mbps ports
Port Priority 128
Spanning Tree Protocol Enabled
System Configuration
Management VLAN All
BootP Enable Disabled
Password <none>
Screen Timeout 10 min
Send Authentication Fail Traps Enabled
SNMP Community Name public, private
Terminal Baud Rate Auto
User Names admin, guest
9033718-01 Product Overview 11
Application Examples
The exploding popularity of the Internet and of corporate intranets, as well
as new, high-bandwidth desktop applications, are driving the demand for
Fast Ethernet. The increase in multimedia traffic and the need to support
legacy protocols alongside new, data intensive applications is driving the
need for network segmentation and traffic prioritization.
The VH-8TX1UM/VH-8TX1MF switch is ideal for meeting the needs of
today’s high performance networks. The switch’s low cost makes it
attractive and affordable for dedicated 10/100 Mbps connections to the
desktop. In addition, extensive features, including redundant links, traffic
Class of Service and VLAN capability, provide the management needed
for the workgroup and local backbone.
The following sections illustrate the VH-8TX1UM/VH-8TX1MF switch
employed in application examples:
•Client/Server Network
•Local Backbone
Virtual LANs
Acceptable VLAN Frame Type All
Configurable PVID Tagging Yes
GVRP Disabled
Untagged VLAN Group Assignment 1
VLAN Ingress Filtering False
VLAN Learning IVL
Parameter Default Value
12 Product Overview VH-8TX1UM/VH-8TX1MF
Client/Server Network Application
To improve workstation performance in a client/server environment, the
VH-8TX1UM/VH-8TX1MF switch can be configured to provide 200 Mbps
full-duplex Fast Ethernet connections to servers by connecting each to a
dedicated switch port (Figure 1-3). Users can be accommodated through
connections to hubs, both at 10 Mbps and 100 Mbps speeds, through 10
Mbps switches with 100 Mbps uplinks, or through direct connections. The
fiber uplink is available to connect the switch to a remote location, such
as another building floor or a separate building.
Figure 1-3. Client/Server Network Application
9033718-01 Product Overview 13
Local Backbone Application
The VH-8TX1UM/VH-8TX1MF switch can be used in a local backbone
application, connecting network segments together and providing file-
server access (Figure 1-4). Workgroup hubs are provided with a single
connection to the switch while servers are put on dedicated 100 Mbps
ports. Routers and other networking devices can connect off of the
switched backbone as well. The fiber uplink is available to connect the
switch to a remote location, such as another building floor or a separate
building.
Figure 1-4. Local Backbone Application
14 Product Overview VH-8TX1UM/VH-8TX1MF
9033718-01 Installation 15
2. INSTALLATION
Inspecting Your Shipment
When you receive the shipment of your switch, check the package
contents and make sure you have the following items:
•VH-8TX1UM or VH-8TX1MF switch
•Mounting ears and mounting screws
•Four rubber feet
•ESD wrist strap
•Power cord
•RS-232 null-modem cable
•Product documentation
Site Requirements
Before you install the switch, make sure the site meets the following
requirements:
•Mounting
Provide a flat table, shelf surface, or an optional 19 in. (48.3 cm)
equipment rack.
Use an EIA standard equipment rack that is grounded and physically
secure.
•Power source
Provide a power source within six feet (1.8 m) of the installation
location. This source must provide 100 VAC to 240 VAC at 50 to
60 Hz, for 90 VA maximum power consumption. Power specifications
for the switch are shown in Appendix A, “Technical Specifications.”
•Environmental
Install the VH-8TX1UM/VH-8TX1MF switch in a dry area, with
adequate air circulation. Avoid placing the switch in direct sunlight or
near other heat sources, such as hot-air vents. For temperature and
humidity specifications, see Appendix A, “Technical Specifications.”
•Ventilation
Do not restrict airflow by covering or obstructing air inlets on the side
of the switch.
NOTE: Primary voltage selection within the above
ranges is automatic and requires no user action.
16 Installation VH-8TX1UM/VH-8TX1MF
Mounting the Switch on a Table or Shelf
You can mount the switch on a table or shelf. Locate the switch in a
position that allows access to the front panel RJ-45 ports, visibility of the
port LEDs, and access to the rear-panel modules and power cord. Make
sure that the mounting surface can safely support the switch and that
there is adequate space around the switch for ventilation and cooling.
1. The switch ships with four (4) rubber feet. Stick the self-adhesive
rubber foot pads on each of the four concave spaces located on the
bottom of the switch. The rubber foot pads cushion the switch against
shock/vibrations and provide space between each switch for
ventilation.
2. If you want to stack switches, repeat step 1 for each switch to be
stacked. Place the first switch on a firm flat surface where you want
to install the stack. Stack the other switches on top of this unit.
9033718-01 Installation 17
Mounting the Switch in a Rack
The switch ships with two (2) multi-position mounting ears and four (4)
mounting screws.
Figure 2.1 shows the orientation of the mounting ears for attaching the
ears to the switch for a rack mount application. Mount the switch with the
front panel facing forward. Do the following:
1. Mount one of the ears to the switch using two (2) of the supplied
screws. Repeat this step for the other side of the switch.
2. Slide the switch into the rack and align the holes in the rack mounting
ears with the holes in the rack rails.
3. Insert and tighten appropriate rack-mounting screws (not provided).
Figure 2-1. Mounting the Switch in a Rack
NOTE: The mounting screws are used to attach the
mounting ears to the switch. Once the ears are attached
to the switch, you will need to provide appropriate
screws to mount the switch in a rack.
18 Installation VH-8TX1UM/VH-8TX1MF
Connecting a Terminal to the Console Port
The console port is a serial RS-232 interface port that enables a
connection to a terminal for performing switch monitoring and
configuration functions. The terminal may be a PC or workstation running
terminal emulation software, or a terminal configured as a Data Terminal
Equipment (DTE) connection. Alternatively, this port can be connected to
an external modem to enable remote dial-in management. You can use
the out-of-band management program (described in the Management
Guide) over a standard modem connection.
If you connect a terminal to the console port prior to powering on the
switch, you can observe the progress and results of the power-on self test
as the switch goes through its initialization process. See “Powering the
Switch” on page 20.
The console port is configured as a standard RS-232 connection using a
male DB-9 connector (see Table A-1 for pinouts). A null-modem wired
RS-232 cable is supplied with the switch for connecting to this interface.
This cable is shielded to comply with emissions regulations and
requirements.
Console Port (Out-of-Band) Connections
To connect the VH-8TX1UM/VH-8TX1MF console port to a terminal, do
the following:
1. Connect a VT100 compatible terminal or a PC running a terminal
emulation program to the console port (Figure 2-2). Use the null-
modem cable provided with the switch, or use a null-modem
connection that is compatible with the console port pin assignments
shown in Appendix A.
Figure 2-2. Connecting a Terminal to the Console Port
9033718-01 Installation 19
2. Connect one end of the interface cable directly to the switch’s
console port and tighten the retaining screws.
3. Connect the other end of the interface cable to a terminal (in some
instances, an adapter may be required to make this connection).
4. From your terminal, start the terminal emulation program.
5. Configure the terminal to the following communication settings:
VT100 emulation, 19200 baud, no parity, 8 data bits, 1 stop bit, no
flow control, ASCII character set.
Remote Management via the Console Port
Configure the Switch Site - Connect the switch’s DB-9 serial port to the
modem’s serial port using standard cabling. For most modems using a
25-pin port, you will have to provide an RS-232 cable with a 9-pin
connector on one end and a 25-pin connection on the other end. You do
not have to set the modem at the switch’s site, because the switch will
automatically configure it to auto-answer mode.
Configure the Remote Site - At the remote site, connect the PC’s COM
port (COM 1-4) to the modem’s serial port. Set terminal emulation type to
VT100, specify the port used by your PC (i.e., COM 1-4), then set
communications to 8 data bits, 1 stop bit, no parity, 19200 bps, and no
flow control.
In-Band Connections
Prior to accessing the switch via a network connection, you must
configure it with a valid IP address, subnet mask, and default gateway
using an out-of-band connection or the BootP protocol.
Telnet Connection - Prior to accessing the switch via an in-band Telnet
connection, you must configure it with a valid IP address, subnet mask,
and default gateway using an out-of-band connection or the BootP
protocol. After configuring the switch’s IP parameters, you can access the
on-board configuration program from anywhere within the attached
network.
In-Band Network Connection - The on-board configuration program can
be accessed using Telnet from any computer attached to the network.
The switch can also be managed by any computer using a Web browser
(Internet Explorer 4.0 or above, or Netscape Navigator 4.0 or above), or
from a network computer using third-party network management
software.
NOTE: The switch must first be configured to issue
BootP requests, since the default is BootP disabled.
Refer to the Management Guide for more information.
20 Installation VH-8TX1UM/VH-8TX1MF
Powering the Switch
To supply power to the switch, connect the power cord to the switch and
to a grounded three-prong wall outlet (Figure 2-3). See Appendix A,
“Technical Specifications” on page 25 for more information regarding
specific international power cord requirements.
Figure 2-3. Connecting the Power Cord
The Power LED lights green (see Figure 1-1). If it does not, check to make
sure that the power cable is plugged in correctly and that the power
source is good.
When power is applied, the switch conducts a series of hardware and
software tests to verify operation. If a terminal or computer is connected
to the console port, the results of the tests are displayed on the screen. If
you want to display the results of the tests after the switch has been
turned on, turn the power to the switch off then back on.
The switch performs two basic types of tests at power-up. During this
time, all the LEDs light in sequence. These tests are:
•Serial port
The serial console port test is the first test. If the switch fails, no
further tests are performed and the console displays no information.
•Memory
Memory tests on the CPU RAM are performed after the serial port
test. No results are displayed on the console.
After these tests are performed, the system initialization screen provides
the option of starting the operational software of the switch or performing
an XMODEM download to upgrade system firmware. When the
operational software is started, the system is functional and the user
interface is ready to receive commands at the console.
9033718-01 Installation 21
Network Cable Requirements
Copper
Table 2.1 specifies the cable types and length constraints for the various
copper interfaces on the VH-8TX1UM/VH-8TX1MF.
Table 2-1. Copper Cable Specifications
Fiber
Table2.2 specifies the fiber type, bandwidth requirement, and length
constraint for the Fast Ethernet fiber interface.
Table 2-2. Fast Ethernet Fiber Specifications
Interface Type Cable Requirement Maximum Length
10Base-T Category 3 or 5 Unshielded Twisted
Pair (UTP)
100 m (328 ft.)
100Base-TX Category 5 UTP 100 m (328 ft.)
Interface Type Fiber Type Fiber Diameter
(microns)
Maximum Length (m)
100Base-FX (SC
connectors)
multi-mode 62.5 2,000m (6,560 ft.)
100Base-FX (SC
connectors)
Single-mode 10 10 km (6.21 miles)
22 Installation VH-8TX1UM/VH-8TX1MF
10Base-T/100Base-TX Ports
The 10Base-T/100Base-TX ports use RJ-45 connectors. Figure 2-4
shows an RJ-45 connector being inserted into a port.
Figure 2-4. Inserting an RJ-45 Connector into a Port
The ports on the base unit are wired with the MDI-X function
implemented. These ports interface to UTP cabling for
connection to
10Base-T or 100Base-TX network segments or end-stations.
These UTP
connections meet the requirements of ISO 8877, specified by 10Base-T,
Section 14 of the IEEE 802.3 specification. Workstations or servers can
be connected to these ports using standard straight-through wired cables.
For connections to other switches or hubs, use an MDI port on the other
device. If an MDI port is not available, a crossover
cable may be
necessary (refer to “
MDI/MDI-X Crossover Cable Wiring” in Appendix A).
See Table A-2, “10Base-T/100Base-TX Pinouts,” for 10Base-T/
100Base-TX connector pin assignments.
9033718-01 Installation 23
100Base-FX Fiber Port
The 100Base-FX fiber port uses an SC connector. Figure 2-5 shows an
SC
fiber connector being inserted into the fiber port on the VH-8TX1UM/VH-
8TX1MF.
Figure 2-5. Inserting an SC Fiber Connector into the Fiber Port
The fiber uplink on the VH-8TX1MF supports multi-mode 62.5/125µm
fiber with SC connectors. The fiber connectors are configured as a
receive (RX) / transmit (TX) pair.
The fiber uplink on the VH-8TX1UM supports single-mode 10/125 µm
fiber with SC connectors. The fiber connectors are configured as a
receive (RX) / transmit (TX) pair.
24 Installation VH-8TX1UM/VH-8TX1MF
9033718-01 Technical Specifications 25
APPENDIX A. TECHNICAL SPECIFICATIONS
General
Standards Compliance
IEEE 802.1D Transparent Bridging Specifications (ISO/IEC 10038)
IEEE 802.1p Traffic Class Expediting and Dynamic Multicast Filtering
IEEE 802.1Q Virtual Bridged Local Area Networks
IEEE 802.2 Local Area Networks, Logical Link Control (LLC)
IEEE 802.3 CSMA/CD 9 (ISO/IEC 8802-3)
IEEE 802.3i 10Base-T (ISO/IEC 8802-3, clause 14)
IEEE 802.3u 100Base-TX (ISO/IEC 8802-3, clause 25)
IEEE 802.3u 100Base-FX
IEEE 802.3x Flow Control
EIA RS-232C (DTE-to-DCE)
EIA RS-310C (19” rackmount)
Regulatory Compliance
Safety: UL 1950, CSA C22.2 No 950, 73/23/EEC, EN 60950, IEC 950
Electromagnetic Compatibility (EMC): FCC Part 15, CSA C108.8,
89/336/EEC, EN 55022, EN 55024, EN 61000-3-2, EN 61000-3-3,
AS/NZS 3548, VCCI V-3
Data Rate
10 Mbps Manchester encoded, 100 Mbps 4B/5B encoded.
Environmental Specifications
Operating temperature: 32° to 122°F (0° to 40°C)
Operating humidity: 5 to 95% relative, noncondensing
Storage temperature: -40° to 158°F (-40° to 70°C)
Storage humidity: 5 to 95% relative, noncondensing
26 Technical Specifications VH-8TX1UM/VH-8TX1MF
Electrical Specifications
Input voltage: 100-240 VAC
Input frequency: 50-60 Hz
Maximum power consumption: 90 VA
Physical Specifications
Height: 1.72 in. (4.36 cm)
Length: 8.03 in. (20.4 cm)
Width: 13 in. (33 cm )
Weight: 4.17 lb. (1.89 kg)
9033718-01 Technical Specifications 27
Port Specifications
Console Port
Table A-1 shows the console port pin assignments.
Table A-1. RS-232 Console Port Pin Assignments
10Base-T and 100Base-TX Ports
Table A-2 shows the 10Base-T/100Base-TX pinouts. These ports are
wired MDI-X. All undefined pins are not used.
Table A-2. 10Base-T/100Base-TX Pinouts
Pin Signal Name
1 DCD
2RXD
3TXD
4DTR
5 Ground
6DSR
7RTS
8CTS
9RI
Pin MDI-X Signal Name
1 RD+
2 RD-
3TD+
6TD-
28 Technical Specifications VH-8TX1UM/VH-8TX1MF
MDI/MDI-X Crossover Cable Wiring
Figure A-1 shows the wiring scheme for implementing a crossover cable
if needed for connection to the switch’s 10Base-T or 100Base-TX ports.
Such a cable may be required when connecting the switch to another
switch or a hub device.
Figure A-1. External Crossover Cable Wiring
Power Cord Set Requirements
The wide-range input feature of the VH-8TX1UM/VH-8TX1MF Ethernet
switch permits it to operate from any line voltage between 100 and 240
VAC.
The power cord set (appliance coupler, flexible cord, and wall plug) you
received with the switch meets the requirements for use in the country
where you purchased the switch.
Power cord sets for use in other countries must meet the requirements of
the country where you use the switch. For more information on power
cord set requirements, contact your Enterasys Networks Support
Representative.
General Requirements
The requirements listed below are applicable to all countries:
•The length of the power cord set must be at least 5.00 feet (1.5 m)
and a maximum of 6.56 feet (2.0 m).
•All power cord sets must be approved by an acceptable accredited
agency responsible for evaluation in the country where the power
cord set will be used.
•The power cord set must have a minimum current capacity of 10A
and a nominal voltage rating of 125 or 250 VAC, as required by each
country’s power system.
•The appliance coupler must meet the mechanical configuration of an
EN 60 320/IEC 320 Standard Sheet C13 connector for mating with
appliance inlet on the hub.
9033718-01 Technical Specifications 29
Country-Specific Requirements
Table A-3 lists the power cord set requirements by country and identifies
the accredited agency within that country.
Table A-3. Power Cord Set Requirements by Country
Note 1
Flexible cord must be <HAR> Type HO5VV-F or HO3VV-F, 3-conductor,
1.0 mm2, or 0.75 mm2 conductor size. Power cord set fittings (appliance
coupler and wall plug) must bear the certification mark of the agency
responsible for evaluation in the country where it will be used.
Country Accredited Agency See Notes *
Australia EANSW 1
Austria OVE 1
Belgium CEBC 1
Canada CSA 2
Denmark DEMKO 1
Finland FIMKO 1
France UTE 1
Germany VDE 1
Italy IMQ 1
Japan JIS 3
Netherlands KEMA 1
Norway NEMKO 1
Sweden SEMKO 1
Switzerland SEV 1
United Kingdom BSI 1
United States UL 2
* The note column includes a number. Associate this
number with the corresponding notes listed after the table
to obtain specific power standards and requirements.
30 Technical Specifications VH-8TX1UM/VH-8TX1MF
Note 2
Flexible cord must be Type SV, SJ, SPT or equivalent, No. 18 AWG,
3-conductor. Wall plug must be a two-pole grounding type with a NEMA
5-15P (15A, 125V) or NEMA 6-15P (15A 250V) configuration.
Note 3
Appliance coupler, flexible cord, and wall plug must bear a “T” mark and
registration number in accordance with the Japanese Dentori Law.
Flexible cord must be Type VCT or VCTF, 3-conductor, 0.75mm2
conductor size. Wall plug must be a two-pole grounding type with a
Japanese Industrial Standard C8303 (15A, 125V) configuration.
9033718 Flow Control 31
APPENDIX B. FLOW CONTROL
Flow control is a mechanism which allows you to protect the switch from
overload conditions and to keep additional traffic off the network when
excessive congestion will result. Figure B-1 illustrates flow control for both
half- and full-duplex applications.
Figure B-1. Flow Control for Half- and Full-Duplex Applications
Each port of the switch has a transmit queue which buffers frames to be
sent out on that port. In this example, large amounts of data are being
sent from Workstation A (connected to port X) and other ports on the
switch to Workstation B (connected to port Y).The queue on port Y starts
filling up with data until it reaches a determined threshold. The packet
which causes the threshold to be exceeded triggers the flow-control
function on the port from which the packet entered the switch, in this case
port X.
Since port X is configured with flow control set to Enabled, the switch
responds by initiating a pause frame (full-duplex applications) or back-
pressure mechanism (half-duplex applications). The pause frame causes
Workstation A to stop sending packets. After a certain amount of time has
elapsed, determined by a value in the pause frame, Workstation A will
resume sending data. Similarly, the back-pressure mechanism forces
Workstation A to stop sending packets by inducing collisions on port X.
The pause-frame flow-control mechanism supported by the
VH-8TX1UM/VH-8TX1MF switch conforms with the IEEE 802.3x
specification for full-duplex flow control.
For the full-duplex pause-frame mechanism to work, the device
connected to the switch port must also support IEEE 802.3x flow control.
Flow control is configurable per port in the Port Configuration Menu of the
console menus, using the on-board Web agent, or via SNMP.
32 Flow Control VH-8TX1MF
9033718 Acronyms & Abbreviations 33
APPENDIX C. ACRONYMS & ABBREVIATIONS
Term Definition
10Base-T 10 Mbps twisted-pair Ethernet
100Base-TX 100 Mbps twisted-pair Fast Ethernet
100Base-FX 100 Mbps fiber option Fast Ethernet
ANSI American National Standards Institute
BootP Bootstrap Protocol
CAT5 Category 5
CRC Cyclic Redundancy Check
CSMA/CD Carrier Sense Multiple Access/Collision
Detection
DCE Data Communications Equipment (modem)
DSR Data Send Ready
DTE Data Terminal Equipment
DTR Data Terminal Ready
ESD Electrostatic Discharge
FCS Frame Check Sequence
HTTP Hypertext Transfer Protocol
ICMP Internet Control Message Protocol
IEEE Institute of Electrical and Electronics Engineers
IP Internet Protocol
LAN Local Area Network
MAC Media Access Control
MDI Media Dependent Interface
LED Light Emitting Diode
MDI Media Device Interface
MIB Management Information Base
RFC Request for Comment
RMON Remote Monitoring
RXD Receive Data
SNMP Simple Network Management Protocol
TCP/IP Transmission Control Protocol/Internet
Protocol
TFTP Trivial File Transfer Protocol
34 Acronyms & Abbreviations VH-8TX1MF
TXD Transmit Data
UTP Unshielded Twisted Pair
VLAN Virtual LAN
Term Definition
9033718 Index 1
INDEX
10Base-T/100Base-TX ports, 22
802.1D, 4
802.1p, 9
802.1Q, 2, 9
802.3, 22
802.3x, 9
A
application examples, 11
architecture of switch, 2
auto-negotiation, 2, 7
B
back-pressure flow control, 31
BootP, 8, 19
browsers, Web, 6, 19
buffers, frame, 5
C
cable requirements, 21
Class of Service, 9
client/server application, 12
communication settings, console port, 19
configuration interfaces, 5
connecting network cables, 21
console port, 5, 18, 27
contents of package, 15
cooling requirements, 15
copper cables, 21
crossover cable, 22, 28
D
data rates, 25
DB-9 connector, 6
default settings, 10
description of switch, 1
dimensions of switch, 26
downloading software, 5
DTE connection, 18
duplex mode, auto-negotiation of, 7
E
ears, mounting, 17
electrical specifications, 26
EMC compliance, 25
environmental
requirements, 15
specifications, 25
F
fault tolerance
port trunking, 9
Spanning Tree, 4
features of switch, 2
fiber
cables, 21
ports, 23
Flash memory, 5
flow control
explained, 31
features, 8
frame buffering, 5
frame tagging, 9
front panel components, 3
full-duplex mode, 8
H
hardware features, 2
hardware tests, 20
I
IEEE 802.1D, 4
IEEE 802.1p, 9
IEEE 802.1Q, 2, 9
IEEE 802.3, 22
IEEE 802.3x, 9, 31
in-band configuration, 6
in-band connection, 19
indicators, LED, 2
inspecting your shipment, 15
installation
in a rack, 17
on table or shelf, 16
requirements, 15
L
laser safety, v
LED indicators, 2, 3
2 Index VH-8TX1MF
load balancing, 9
local backbone application, 13
location requirements, 15
M
management interfaces, 5
MDI, 22
MDI-X, 22, 27
memory tests, 20
mirror ports, 7
modem connection, 19
mounting ears, 17
mounting the switch
in a rack, 17
on a table or shelf, 16
multi-mode fiber, 21, 23
N
network applications, 11
network management features, 2
network traffic analysis, 7
non-volatile Flash memory, 5
null-modem cable, 18
O
out-of-band configuration, 5
P
package contents, 15
password protection, 6
pause frames, 31
physical specifications, 26
pin assignments, 27
ports
mirroring, 7
specifications, 27
trunking, 9
types supported, 2
power
connector, 4
consumption, 26
source requirements, 15
power cord
connecting, 20
set requirements, 28
Power LED defined, 3
powering the switch, 20
power-up diagnostics, 18, 20
priority queuing, 9
R
rear panel components, 4
regulatory compliance, 25
RJ-45 ports
connections, 22
pinouts, 27
RMON, 6
RS-232 port
cable connection, 18
out-of-band management, 6
pin assignments, 27
rubber foot pads, 16
S
safety compliance, 25
SC ports, 23
screws, mounting, 17
serial port
connecting to, 18
out-of-band management, 5
pin assignments, 27
site requirements, 15
SNMP-based network manager, 6
software features, 2
software tests, 20
Spanning Tree Protocol, 4
standards compliance, IEEE, 25
store-and-forward switching, 5
switch description, 1
T
TCP/IP protocol, 6
Telnet, 6, 19
terminal connection, 6, 18
tests, hardware and software, 20
TFTP download, 5
traffic priority, 9
transmit queues, 31
trunking, 9
U
unshielded twisted pair (UTP) cables, 21
upgrading software, 5
V
ventilation requirements, 15
VLANs, 9
VT100 connection, 6
9033718 Index 3
W
Web-based network manager, 6
X
XMODEM download, 5, 20
4 Index VH-8TX1MF
150728-102 R02

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