HP 3400CL-24G manual Configuration Considerations, Configuring Udld

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.

N o t e

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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