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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 reset
udld reset
Use the udld reset privileged EXEC command to reset all interfaces shut down by UniDirectional Link
Detection (UDLD) and to permit traffic to again pass through. Other features, such as spanning tree, Port
Aggregation Protocol (PAgP), and Dynamic Trunking Protocol (DTP), still have their normal effects, if
enabled.
udld reset
Syntax Description This command has no arguments or keywords.
Command Modes Privileged EXEC
Command History
Usage Guidelines If the interface configuration is still enabled for UDLD, these ports begin to run UDLD again and might
shut down for the same reason if the problem has not been corrected.
Examples This example shows how to reset all interfaces disabled by UDLD:
Switch# udld reset
1 ports shutdown by UDLD were reset.
You can verify your settings by entering the show udld privileged EXEC command.
Related Commands
Release Modification
12.0(5.2)WC(1) This command was introduced.
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 UDLD status for all ports or the specified port.
udld Enables UDLD on all fiber-optic ports on the switch.
udld port Enables UDLD on an individual interface or prevents a fiber-optic
interface from being enabled by the udld global configuration command.
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