Enabling Udld; Enabling Udld For Tagged Ports; Changing The Keepalive Interval - Dell PowerConnect B-FCXs Configuration Manual

Enabling UDLD

NOTE
This section shows how to configure UDLD for untagged control packets. To configure UDLD for
tagged control packets, refer to
To enable UDLD on a port, enter a command such as the following at the global CONFIG level of the
CLI.
PowerConnect(config)#link-keepalive ethernet 0/1/1
To enable the feature on a trunk group, enter commands such as the following.
PowerConnect(config)#link-keepalive ethernet 0/1/1 ethernet 0/1/2
PowerConnect(config)#link-keepalive ethernet 0/1/3 ethernet 0/1/4
Syntax: [no] link-keepalive ethernet <port> [to <port> | ethernet <port>]
Specify the <port> variable in the following formats:
•

Enabling UDLD for tagged ports

To enable ports to receive and send UDLD control packets tagged with a specific VLAN ID, enter
commands such as the following.
PowerConnect(config)#link-keepalive ethernet 1/18 vlan 22
This command enables UDLD on port 1/18 and allows UDLD control packet tagged with VLAN 22
to be received and sent on port 1/18.
Syntax: [no] link-keepalive ethernet <port> [vlan <vlan-ID>]
Specify the <port> variable in the following formats:
•
For the <vlan-ID> variable, enter the ID of the VLAN that the UDLD control packets can contain to
be received and sent on the port. If a VLAN ID is not specified, then UDLD control packets are sent
out of the port as untagged packets.
NOTE
You must configure the same VLANs that will be used for UDLD on all devices across the network;
otherwise, the UDLD link cannot be maintained.

Changing the Keepalive interval

By default, ports enabled for UDLD send a link health-check packet once every 500 ms. You can
change the interval to a value from 1 – 60, where 1 is 100 ms, 2 is 200 ms, and so on. To change
the interval, enter a command such as the following.
PowerConnect(config)#link-keepalive interval 3
Syntax: [no] link-keepalive interval <num>
The <num> parameter specifies how often the ports send a UDLD packet. You can specify from 1
– 60, in 100 ms increments. The default is 5 (500 ms).
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
"Enabling UDLD for tagged
UDLD overview
ports".
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