Configuring UDLD

Consult the release notes and current manuals for required software versions and to determine if your switch model interoperates with UDLD.

When UDLD enabled on at least one port , UDLD packet received on UDLD disabled port will be re-forwarded out on all other UDLD disabled ports on the same VLAN as per the below conditions.

  1. If the incoming port itself is already blocked on the VLAN it will be dropped right away, and no re-forwarding will be done.
  2. UDLD packet will be re-forwarded to other UDLD disabled ports of the same VLAN that are in forwarding state( non blocked ports).