Cisco Catalyst 2950

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Catalyst 2950 and Catalyst 2955 Switch Command Reference
OL-10102-01
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
udld
• The no udld enable global configuration command followed by the udld {aggressive | enable}
global configuration command to re-enable UDLD globally
• The no udld port enable interface configuration command followed by the udld port or udld port
aggressive interface configuration command to re-enable UDLD on the specified interface
• The errdisable recovery cause udld and errdisable recovery interval interval global
configuration commands to automatically recover from the UDLD error-disabled state
Examples This example shows how to enable UDLD in normal mode on all fiber-optic interfaces:
Switch(config)# udld enable
You can verify your settings by entering the show udld privileged EXEC command.
Related Commands Command Description
show running-config Displays the running configuration on the switch. For syntax information,
select Cisco IOS Configuration Fundamentals Command Reference for
Release 12.1 > Cisco IOS File Management Commands > Configuration
File Commands.
show udld Displays the UDLD status for all ports or the specified port.
udld port Enables UDLD on an individual interface or prevents a fiber-optic
interface from being enabled by the udld global configuration command.
udld reset Resets any interface shut down by UDLD and permits traffic to again pass
through.