Enabling and Disabling LDP on a VLAN

Each VLAN (Virtual LAN) must be specifically LDP-enabled in order to set up LDP adjacencies over the interface. Before LDP can be enabled on a VLAN, the VLAN must be configured to support MPLS (Multiprotocol Label Switching) as described in Adding MPLS Support to VLANs.

To enable LDP on a VLAN, use the following command:
enable mpls ldp [{vlan} vlan_name | vlan all]

This command enables LDP on one or all VLANs for which MPLS has been configured.

Note
If you have enabled LDP and MPLS on an IGP interface that is used to reach a particular destination, make sure that you enable LDP and MPLS on all additional IGP interfaces that can reach that same destination (for example, enable LDP and MPLS on all OSPF (Open Shortest Path First) VLANs that are connected to the backbone network).
To disable LDP on a VLAN, use the following command:
disable mpls ldp [{vlan} vlan_name | vlan all]

This command disables LDP on one or all VLANs for which MPLS has been configured. This command terminates all LDP hello adjacencies and all established LDP LSPs that use the specified interface(s).

Published March 2020prev | next