ProCurve 6200yl Management And Configuration Manual page 246

Port Status and Configuration
Uni-Directional Link Detection (UDLD)
ProCurve(config)# show link-keepalive statistics
Port:
Current State:
Udld Packets Sent:
Udld Packets Received: 1000
Port Blocking:
Port:
Current State:
Udld Packets Sent:
Udld Packets Received: 450
Port Blocking:
Port:
Current State:
Udld Packets Sent:
Udld Packets Received: 0
Port Blocking:
Port:
Current State:
Udld Packets Sent:
Udld Packets Received: 50
Port Blocking:
10-30
To display detailed UDLD information for specific ports, enter the show link-
keepalive statistics command. For example:
1
up
1000
no
2
up
500
no
3
off line
0
no
4
failure
128
yes
Figure 3. 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 3 for an
example).
Ports 1 and 2 are UDLD-enabled and show
the number of health check packets sent
and received on each port.
Neighbor MAC Addr:
Neighbor Port:
State Transitions:
Link-vlan:
Neighbor MAC Addr:
Neighbor Port:
State Transitions:
Link-vlan:
Neighbor MAC Addr:
Neighbor Port:
State Transitions:
Link-vlan:
Neighbor MAC Addr:
Neighbor Port:
State Transitions:
Link-vlan:
0000a1-b1c1d1
5
2
1
000102-030405
6
3
200
n/a
n/a
0
Port 4 is shown as blocked
due to a link-keepalive failure
1
n/a
n/a
8
1