HP ProCurve 6120G/XG

Port Status and Configuration
Uni-Directional Link Detection (UDLD)
To display detailed UDLD information for specific ports, enter the show link-
keepalive statistics command. For example:
Ports 1 and 2 are UDLD-enabled and show
the number of health check packets sent
and received on each port.
ProCurve(config)# show link-keepalive statistics
1 Port:
Port:
Port Blocking:
Current State: up Neighbor MAC Addr: 0000a1-b1c1d1
Udld Packets Sent: 1000 Neighbor Port: 5
Udld Packets Received: 1000 State Transitions: 2
Port Blocking: no Link-vlan: 1
2
Current State: up Neighbor MAC Addr: 000102-030405
Udld Packets Sent: 500 Neighbor Port: 6
Udld Packets Received: 450 State Transitions: 3
no Link-vlan: 200
Port: 3
Current
State: off line Neighbor MAC Addr: n/a
Udld Packets Sent: 0 Neighbor Port: n/a
Udld Packets Received: 0 State Transitions: 0
Port 4 is shown as blocked
Port Blocking: no Link-vlan: 1
due to a link-keepalive failure
Port: 4
Current State: failure Neighbor MAC Addr: n/a
Udld Packets Sent: 128 Neighbor Port: n/a
Udld Packets Received: 50 State Transitions: 8
Port Blocking: yes Link-vlan: 1
Figure 10-23. Example of Show Link-Keepalive Statistics Command
To clear UDLD statistics, enter the following command:
ProCurve# clear link-keepalive statistics
This command clears the packets sent, packets received, and transitions
counters in the show link keepalive statistics display (see Figure 10-23 for an
example).
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