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Enhancements
Release M.10.09 Enhancements
Configuration Considerations
■ UDLD is configured on a per-port basis and must be enabled at both ends of the link. See the
note below for a list of ProCurve switches that support UDLD.
■ To configure UDLD on a trunk group, you must configure the feature on each port of the
group individually. Configuring UDLD on a trunk group’s primary port enables the feature
on that port only.
■ Dynamic trunking is not supported. If you want to configure a trunk group that contains
ports on which UDLD is enabled, you must remove the UDLD configuration from the ports.
After you create the trunk group, you can re-add the UDLD configuration.
Note
UDLD interoperates with the following ProCurve switch series: 2600, 2800, 3400, 3500, 4200, 5300,
5400, 6200, 6400, and 9300. Consult the release notes and current manuals for required software
versions.
Configuring UDLD
The following commands allow you to configure UDLD via the CLI.
Syntax: [no] interface <port-list> link-keepalive
Enables UDLD on a port or range of ports.
To disable the feature, enter the no form of the command.
Default: UDLD disabled
Syntax: link-keepalive interval <interval>
Determines the time interval to send UDLD control packets. The <interval> param-
eter specifies how often the ports send a UDLD packet. You can specify from 10 –
100, in 100 ms increments, where 10 is 1 second, 11 is 1.1 seconds, and so on.
Default: 50 (5 seconds)
Syntax: link-keepalive retries <num>
Determines the maximum number of retries to send UDLD control packets. The
<num> parameter specifies the maximum number of times the port will try the health
check. You can specify a value from 3 – 10.
Default: 5
Syntax: [no] interface <port-list> link-keepalive vlan <vid>
Assigns a VLAN ID to a UDLD-enabled port for sending of tagged UDLD control
packets.Under default settings, untagged UDLD packets can still be transmitted and
received on tagged only ports—however, a warning message will be logged.
The no form of the command disables UDLD on the specified port(s).
Default: UDLD packets are untagged; tagged only ports will transmit and receive
untagged UDLD control packets
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