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Cisco Catalyst 2960-XR Configuration Guide

Cisco Catalyst 2960-XR
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CHAPTER 8
Configuring UniDirectional Link Detection
Finding Feature Information, page 167
Restrictions for Configuring UDLD, page 167
Information About UDLD, page 168
How to Configure UDLD, page 171
Monitoring and Maintaining UDLD, page 173
Additional References for UDLD, page 174
Feature Information for UDLD, page 175
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature
information and caveats, see the release notes for your platform and software release.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not
required.
Restrictions for Configuring UDLD
The following are restrictions for configuring UniDirectional Link Detection (UDLD):
A UDLD-capable port cannot detect a unidirectional link if it is connected to a UDLD-incapable port
of another switch.
When configuring the mode (normal or aggressive), make sure that the same mode is configured on
both sides of the link.
Loop guard works only on point-to-point links. We recommend that each end of the link has a directly
connected device that is running STP.
Caution
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
OL-29424-01 167

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Cisco Catalyst 2960-XR Specifications

General IconGeneral
Stacking Bandwidth80 Gbps
Layer SupportLayer 2 and Layer 3
Jumbo Frame Support9198 bytes
RAM512 MB
Input Voltage100-240V AC
ModelCatalyst 2960-XR
Uplink Interfaces4 x 1G SFP or 2 x 10G SFP+
Downlink Interfaces24 or 48 x Gigabit Ethernet ports
Power SupplyInternal
MAC Address Table Size16, 000 entries
PoEAvailable on PoE models
Weight4.5 kg
Featuresenergy efficiency
StackingUp to 8 switches
Operating Temperature0 to 45°C

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