Aruba 2530 - Viewing UDLD Information (CLI); Viewing Summary Information on All UDLD-Enabled Ports (CLI)

To enable ports to receive and send UDLD control packets tagged with a specific VLAN ID, enter a command
such as the following at the interface configuration level:
switch(config)#interface link-keepalive vlan 22
NOTE:
• You must configure the same VLANs that will be used for UDLD on all devices across the
network; otherwise, the UDLD link cannot be maintained.
• If a VLAN ID is not specified, UDLD control packets are sent out of the port as untagged packets.
• To re-assign a VLAN ID, re-enter the command with the new VLAN ID number. The new
command overwrites the previous command setting.
• When configuring UDLD for tagged ports, you may receive a warning message if there are any
inconsistencies with the VLAN configuration of the port.
Viewing UDLD information (CLI)
Syntax:
show link-keepalive
Displays all the ports that are enabled for link-keepalive.
Syntax:
show link-keepalive statistics
Displays detailed statistics for the UDLD-enabled ports on the switch.
Syntax:
clear link-keepalive statistics
Clears UDLD statistics. This command clears the packets sent, packets received, and transitions counters in the
show link-keepalive statistics display.
Viewing summary information on all UDLD-enabled ports (CLI)
Enter the show link-keepalive command.
Chapter 3 Port Status and Configuration 81