Juniper Networks 300 Dual mode 2.4GHz / 5GHz Access Point User Manual Release Notes for MP access points

Juniper Networks, Inc. Dual mode 2.4GHz / 5GHz Access Point Release Notes for MP access points

Contents

Manual Pt 3

Trapeze Network s, Inc.
5753 W. Las Positas Blvd.
Pleasanton, CA 94588
Tel: +1 925-474-2200
Fax: +1 925-251-0642
Toll-Free: 877-FLY-TRPZ (877-359-8779) Part Number: 735-9502-0023, Revision A
For the most current version of this document
see www.trapezenetworks.com
Release Notes for Trapeze Networks™
Mobility Point™ Access Points
Distributed MPs and Link Autonegotiation
Description
The Ethernet interfaces on an MP are configured to autonegotiate the link speed (10 Mbps or
100 Mbps) and mode (half duplex or full duplex). The setting cannot be changed. A common setting on
third-party switches is 100 Mbps, with full duplex. If you connect a Distributed MP to a port that is set for
100 Mbps with full duplex, the MP operates at 100 Mbps with half duplex. This results in an unusable link.
Workaround
Configure the port on the other device to autonegotiate.
Distributed MPs and STP
Description
A Distributed MP is a leaf device. You do not need to enable STP on the port that is directly
connected to the MP.
If Spanning Tree Protocol (STP) is enabled on the port that is directly connected to a Distributed MP, you
might need to change the STP configuration on the port, to allow the MP to boot.
Distributed MPs and Link Autonegotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Distributed MPs and STP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
MP-620 BNC Connector Is Not Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Power Over Ethernet Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Note. STP on a port directly connected to a Distributed MP can prevent the MP from booting.
MP-620 BNC Connector Is Not Used
Release Notes for Trapeze Networks™ Mobility Point™ Access Points
2
As part of the boot process, an MP disables and reenables the link on the port over which the MP is
attempting to boot. If STP is enabled on the device that is directly connected to the port, the link state
change can cause the port on the other device to leave the forwarding state and stop forwarding traffic. The
port remains unable to forward traffic for the duration of the STP forwarding delay.
An MP waits 30 seconds to receive a reply to its DHCP Discover message, then tries to boot using the
other MP port. If the boot attempt fails on the other port also, the MP then reattempts to boot on the first
port. The process continues until a boot attempt is successful. If STP prevents the other device’s port from
forwarding traffic during each boot attempt, the MP repeatedly disables and reenables the link, causing
STP to repeatedly stop the other device’s port from forwarding traffic. As a result, the boot attempt is never
successful.
Workaround
To allow an MP to boot over a link that has STP enabled, do one of the following on the
other device:
zDisable STP on the other device’s port.
zEnable the port fast convergence feature, if supported, on the other device’s port. (On some vendors’
devices, this feature is called PortFast.)
zIf the other device is running Rapid Spanning Tree or Multiple Spanning Tree, set the port into edge
port mode.
MP-620 BNC Connector Is Not Used
The MP-620 has a BNC connector located between the Ethernet port and the grounding point screw. (See
Figure 1.) This port is not used in MSS Version 4.1.
Figure 1. MP Access Point Model MP-620—Bottom View
Ethernet Port RSSI Connector with
Protective Cap
Grounding Point
Screw
Release Notes for Trapeze Networks™ Mobility Point™ Access Points
3
Power Over Ethernet Support
Power Over Ethernet Support
Trapeze Networks recommends that you budget for a minimum of 9 Watts of power draw per MP, for
model MP-372. For an MP-620, budget for a maximum power draw of 30 Watts. For all other models,
budget for a maximum power draw of 8 Watts per MP.
Table 1 lists the Power over Ethernet (PoE) sources from which MPs can accept power. Table 2 lists the
MP models that support 802.3af and the 802.3af classes of these models.
Table 1. PoE Sources Supported By Trapeze MPs
PoE Source Wire Pairs Used by PoE MP-3xx
MP-52 MP-620 MP-2xx
MP-1xx
MX-20, MX-8, or MXR-2 Pairs unused for traffic Supported Not Supported Supported
PowerDsine 802.3af Pairs unused for traffic Supported Not Supported Supported
MP-620 PoE injector Pairs unused for traffic Not Supported Supported1
1. Use only the PoE injector that is shipped with the MP-620.
Not Supported
Cisco product with AF in
product ID
Pairs also used for traffic
(802.11af-compliant)
Supported Not Supported Not Supported
Cisco PoE blade with PWR
in product ID2
2. If your Cisco product has V in the product ID, contact your vendor to determine whether the product is AF-compliant.
Pairs also used for traffic
(proprietary)
Not Supported Not Supported Not Supported
Cisco PoE injector
(AIR-PWR-xxx)
Pairs also used for traffic
(proprietary)
Not Supported Not Supported Not Supported
Table 2. MP Models that Support 802.3af
MP Model MP-372 MP-620 MP-352
MP-341
MP-2xx
MP-1xx MP-52
802.3af Supported? Yes No Yes No Yes
802.3af Class 3 Not Applicable 0 Not Applicable 0
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logo, the Trapeze Networks flyer icon, Mobility System, Mobility Exchange, MX, Mobility Point,
MP, Mobility System Software, MSS, RingMaster, AAA Integration and RADIUS Scaling,
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GuestPass, Layer 3 Path Preservation, Location Policy Rule, LPR, Mobility Domain, Mobility
Profile, Passport-Free Roaming, SentryScan, Time-of-Day Access, TDA, TAPA, Trapeze Access
Point Access Protocol, Virtual Private Group, VPG, Virtual Service Set, Virtual Site Survey and
WebAAA are trademarks of Trapeze Networks, Inc. Trapeze Networks SafetyNet is a service
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trademarks, service marks or registered service marks of their respective owners.
4
Power Over Ethernet Support

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