Configuring Udld On The Switch - Cisco Catalyst 4500 Series Software Configuration Manual

Configuring UDLD on the Switch

Configuring UDLD on the Switch
The following sections describe how to configure UDLD:
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Fast UDLD Guidelines and Restrictions
When using (or configuring) Fast UDLD, consider these guidelines and restrictions:
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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
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Fast UDLD Guidelines and Restrictions, page 33-4
Enabling UDLD Globally, page 33-5
Enabling UDLD on Individual Interfaces, page 33-6
Disabling UDLD on Individual Interfaces, page 33-7
Disabling UDLD on a Fiber-Optic Interface, page 33-7
Configuring a UDLD Probe Message Interval Globally, page 33-8
Resetting Disabled LAN Interfaces, page 33-8
Fast UDLD is disabled by default.
Configure fast UDLD only on point-to-point links between network devices that support fast UDLD.
You can configure fast UDLD in either normal or aggressive mode.
Do not enter the link debounce command on fast UDLD ports.
Configure fast UDLD on at least two links between each connected network device. This reduces
the number of link disablements due to false positives.
Fast UDLD does not report a unidirectional link if the same error occurs simultaneously on more
than one link to the same neighbor device.
Fast UDLD is supported on a limited number of ports.
Chapter 33 Configuring UDLD