Cisco Catalyst 3550 Command Reference Manual page 521
Multilayer switch
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Also See for Catalyst 3550:
- Command reference manual (794 pages) ,
- Installation manual (154 pages) ,
- Hardware installation manual (106 pages)
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Chapter 2 Cisco IOS Commands
The disable keyword is supported on fiber-optic ports only. Use the no form of this command to remove
this setting and to return control of UDLD to the udld global configuration command.
If the switch software detects a Gigabit Interface Converter (GBIC) module change and the port changes
from fiber optic to nonfiber optic or vice versa, all configurations are maintained.
You can use these commands to reset an interface shut down by UDLD:
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Examples
This example shows how to enable UDLD on an interface:
Switch(config)# interface gigabitethernet0/11
Switch(config-if)# udld port
This example shows how to disable UDLD on a fiber-optic interface despite the setting of the udld
global configuration command:
Switch(config)# interface gigabitethernet0/11
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
show running-config
show udld
udld
udld reset
78-11195-09
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
Description
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.
Displays UDLD administrative and operational status for all ports or
the specified port.
Enables aggressive or normal mode in UDLD or sets the configurable
message timer time.
Resets all interfaces shut down by UDLD and permits traffic to again
pass through.
Catalyst 3550 Multilayer Switch Command Reference
udld port
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