Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
show udld
show udld
To display the administrative and operational UDLD status, use the show udld priviledge d EXEC
command .
show udld interface-id | neighbors | fast-hello {interface id}
Syntax Description
Defaults None
Command Modes Privileged EXEC
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
Entry 1
---
Expiration time: 43300 ms
Cache Device index: 1
Current neighbor state: Bidirectional
Device ID: FOX10430380
Port ID: Gi1/34
Neighbor echo 1 device: FOX104303NL
Neighbor echo 1 port: Gi1/34
TLV Message interval: 15 sec
interface id Specifies the administrative and operational UDLD status for a sp ecific interface.
neighbors Specifies the UDLD neighbor summary.
fast-hello Specifies Fast UDLD neighbor summary and interface specific status.
interface-id Specifies the name of the interface.