Show Udld - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

show udld

To display the administrative and operational UDLD status, use the show udld priviledged EXEC
command.
Syntax Description interface id
neighbors
fast-hello
interface-id
Defaults None
Command Modes
Privileged EXEC
Command History Release
12.1(8a)EW
12.2(25)EW
12.2(54)SG
Usage Guidelines
If you do not enter an interface_id value, the administrative and operational UDLD status for all
interfaces is displayed.
Examples
To verify status for a particular link as reported by UDLD, enter the following command:
Switch# show udld g1/34
Interface Gi1/34
---
Port enable administrative configuration setting: Enabled / in aggressive mode
Port enable operational state: Enabled / in aggressive mode
Current bidirectional state: Bidirectional
Current operational state: Advertisement - Single neighbor detected
Message interval: 15000 ms
Time out interval: 5000 ms
Port fast-hello configuration setting: Disabled
Port fast-hello interval: 0 ms
Port fast-hello operational state: Disabled
Neighbor fast-hello configuration setting: Disabled
Neighbor fast-hello interval: Unknown
OL-27596 -01
show udld interface-id | neighbors | fast-hello {interface id}
Specifies the administrative and operational UDLD status for a specific interface.
Specifies the UDLD neighbor summary.
Specifies Fast UDLD neighbor summary and interface specific status.
Specifies the name of the interface.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Added support for the 10-Gigabit Ethernet interface.
Added support for show udld fast-hello and show udld fast-hello interface id.
Entry 1
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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
show udld
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