Cisco Catalyst 3750 Metro - Udld (Interface Configuration)

2-747
Catalyst 3750 Metro Switch Command Reference
OL-9645-10
Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
udld (interface configuration)
If the switch software detects a Gigabit Interface Converter (GBIC) module change and the interface
changes from fiber optic to nonfiber optic or the reverse, all configurations are maintained.
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 udld port disable 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 a port:
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# udld port
This example shows how to disable UDLD on a fiber-optic port despite the setting of the udld global
configuration command:
Switch(config)# interface gigabitethernet1/1/1
Switch(config-if)# udld port disable
You can verify your settings by entering the show running-config or the show udld interface privileged
EXEC command.
Related Commands Command Description
show running-config Displays the operating configuration. For syntax information, use this
link to the Cisco IOS Release 12.2 Command Reference listing page:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/prod_com
mand_reference_list.html
Select the Cisco IOS Commands Master List, Release 12.2 to
navigate to the command.
show udld Displays UDLD administrative and operational status for all interfaces
or the specified interface.
udld (global configuration) Enables aggressive or normal mode in UDLD or sets the configurable
message timer time.
udld reset Resets all interfaces shut down by UDLD and permits traffic to again
pass through.