Configuring Uni-Directional Link Detection (UDLD)
December 2005 © Foundry Networks, Inc. 9 - 5
The show link-keepalive command shows the following:
The Link-vlan entry shows the ID of the tagged VLAN in the UDLD packet.
Syntax: show link-keepalive ethernet
Displaying Information for a Single Port
To display detailed UDLD information for a specific port, enter a command such as the following:
Table 9.3: CLI Display of Detailed UDLD Information
This Field... Displays...
Current State The state of the logical link. This is the link between this Foundry port
and the Foundry port on the other end of the link.
Remote MAC Addr The MAC address of the port or device at the remote end of the logical
link.
Local Port The port number on this Foundry device.
Remote Port The port number on the Foundry device at the remote end of the link.
Local System ID A unique value that identifies this Foundry device. The ID can be
used by Foundry technical support for troubleshooting.
Remote System ID A unique value that identifies the Foundry device at the remote end of
the link.
Packets sent The number of UDLD health-check packets sent on this port.
Packets received The number of UDLD health-check packets received on this port.
Transitions The number of times the logical link state has changed between up
and down.
Port blocking Information used by Foundry technical support for troubleshooting.
FastIron SuperX Router(config)# show link-keepalive ethernet
Current State : down Remote MAC Addr : 0000.0000.0000
Local Port : 1/1 Remote Port : n/a
Local System ID : e0eb8e00 Remote System ID : 00000000
Packets sent : 0 Packets received : 0
Transitions : 0 Link-vlan : 100
Port blocking : No BM disabled : Yes
FastIron SuperX Router(config)# show link-keepalive ethernet 4/1
Current State : up Remote MAC Addr : 00e0.52d2.5100
Local Port : 4/1 Remote Port : 2/1
Local System ID : e0927400 Remote System ID : e0d25100
Packets sent : 254 Packets received : 255
Transitions : 1
Port blocking : No BM disabled : No
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