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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 39 for potential problems).
Viewing UDLD Information
The following show commands allow you to display UDLD configuration and
status via the CLI.
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.
To display summary information on all UDLD-enabled ports, enter the show
link-keepalive command. For example:
ProCurve(config)# show link-keepalive
Total link-keepalive enabled ports: 4
Keepalive Retries: 3 Keepalive Interval: 1 sec
Port 1 is UDLD-enabled, and
tagged for a specific VLAN.
1 Yes up up 00d9d-f9b700 200
up up
3 Yes down off-line
4 Yes up failure
5 No down off-line
Port 5 has been disabled by
the System Administrator.
Port Enabled Physical Keepalive Adjacent UDLD
Status Status Switch VLAN
-------------------------------------------------------------------
2 Yes 01560-7b1600
Port 4 is connected, but is blocked
due to a link-keepalive failure
Port 3 is UDLD-enabled, but
has no physical connection.
Figure 10-24. Example of Show Link-Keepalive Command
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