Cisco Catalyst 3750 - Udld Port

2-879
Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
udld
You can use these commands to reset an interface shut down by UDLD:
• The udld reset privileged EXEC command to reset all interfaces shut down by UDLD
• The shutdown and no shutdown interface configuration commands
• 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 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 on all fiber-optic interfaces:
Switch(config)# udld enable
You can verify your setting by entering the show udld privileged EXEC command.
Related Commands Command Description
show udld Displays UDLD administrative and operational 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 all interfaces shut down by UDLD and permits traffic to
again pass through.