Show Udld - Cisco Catalyst 3750 Metro Command Reference Manual

Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands

show udld

Use the show udld user EXEC command to display UniDirectional Link Detection (UDLD)
administrative and operational status for all interfaces or the specified interface.
Syntax Description interface-id
Command Modes
User EXEC
Command History Release
12.1(14)AX
Usage Guidelines If you do not enter an interface-id, administrative and operational UDLD status for all interfaces are
displayed.
Examples This is an example of output from the show udld interface-id command. For this display, UDLD is
enabled on both ends of the link, and UDLD detects that the link is bidirectional.
the fields in this display.
Switch> show udld fastethernet1/0/11
Interface fa1/0/11
---
Port enable administrative configuration setting: Follows device default
Port enable operational state: Enabled
Current bidirectional state: Bidirectional
Current operational state: Advertisement - Single Neighbor detected
Message interval: 60
Time out interval: 5
OL-9645-10
show udld [interface-id]
(Optional) ID of the interface and port number. Valid interfaces include
physical ports and VLANs. The VLAN range is 1 to 4094.
Modification
This command was introduced.
Entry 1
Expiration time: 146
Device ID: 1
Current neighbor state: Bidirectional
Device name: Switch-A
Port ID: Fa1/0/12
Neighbor echo 1 device: Switch-B
Neighbor echo 1 port: Fa1/0/11
Message interval: 5
CDP Device name: Switch-A
Catalyst 3750 Metro Switch Command Reference
show udld
Table 2-30 describes
2-605