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Port Status and Configuration
Uni-Directional Link Detection (UDLD)
■ To re-assign a VLAN ID, re-enter the command with the new VLAN ID
number. The new command will overwrite the previous command
setting.
■ When configuring UDLD for tagged ports, you may receive a warning
message if there are any inconsistencies with the port’s VLAN config-
uration (see page 37 for potential problems).
Viewing UDLD Information
The following show commands allow you to display UDLD configuration and
status via the CLI.
To display summary information on all UDLD-enabled ports, enter the show
link-keepalive command. For example:
Figure 10-22. Example of Show Link-Keepalive Command
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.
Port 5 has been disabled by
the System Administrator.
ProCurve(config)# show link-keepalive
Total link-keepalive enabled ports: 4
Keepalive Retries: 3 Keepalive Interval: 1 sec
Port Enabled Physical Keepalive Adjacent UDLD
Status Status Switch VLAN
-------------------------------------------------------------------
1 Yes up up 00d9d-f9b700 200
2 Yes up up 01560-7b1600 untagged
3 Yes down off-line
4 Yes up failure
5 No down off-line
Port 4 is connected, but is blocked
due to a link-keepalive failure
Port 1 is UDLD-enabled, and
tagged for a specific VLAN.
Port 3 is UDLD-enabled, but
has no physical connection.