ProCurve 2610 Series Management And Configuration Manual page 236

Port Status and Basic Configuration
Uni-Directional Link Detection (UDLD)
ProCurve(config)# show link-keepalive
Total link-keepalive enabled ports: 4
Keepalive Retries:
Port Enabled Physical
Status
-------------------------------------------------------------------
1 Yes up
2 Yes up
3 Yes down
4 Yes up
5 No down
Figure 10-22. Example of Show Link-Keepalive Command
10-44
To display summary information on all UDLD-enabled ports, enter the show
link-keepalive command. For example:
3 Keepalive Interval: 1 sec
Keepalive
Status
up
up
off-line
failure
off-line
Adjacent UDLD
Switch VLAN
00d9d-f9b700 200
01560-7b1600
Port 3 is UDLD-enabled, but
has no physical connection.
Port 4 is connected, but is blocked
due to a link-keepalive failure
Port 5 has been disabled by
the System Administrator.
Port 1 is UDLD-enabled, and
tagged for a specific VLAN.