Displaying Udld Link Status - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 33 Configuring UDLD

Displaying UDLD Link Status

To verify link status reported by UDLD, enter the following command:
Switch# show udld neighbors
Port
----
Gi1/33
Gi1/34
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
To verify link status reported by Fast UDLD, enter the following command:
Switch# show udld fast-hello
Total ports on which fast hello can be configured: 16
Total ports with fast hello configured: 3
Total ports with fast hello operational: 3
Total ports with fast hello non-operational: 0
Port-ID
-------
Gi1/45
Gi1/46
Gi1/47
Device Name Device ID
----------- ---------
FOX10430380 1
FOX10430380 1
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
No TLV fast-hello interval
TLV Time out interval: 5
TLV CDP Device name: Switch
Hello Neighbor-Hello Neighbor-Device Neighbor-Port Status
----- -------------- --------------- ------------- ------
200 200
200 200
200 200
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Port ID Neighbor State
------- --------------
Gi1/33 Bidirectional
Gi1/34 Bidirectional
FOX104303NL Gi1/45
FOX104303NL Gi1/46
FOX104303NL Gi1/47
Displaying UDLD Link Status
Operational
Operational
Operational
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