MPLS LDP provides the means for LSRs to request, distribute, and release label prefix binding information to peer routers in a network. LDP enables LSRs to discover potential peers and to establish LDP sessions with those peers for the purpose of exchanging label binding information.

Label Distribution Protocol (LDP) is a protocol used to distribute labels in non-traffic-engineered applications. LDP allows routers to establish label switched paths (LSPs) through a network by mapping network-layer routing information directly to data link layer-switched paths.

Synchronization between the Label Distribution Protocol (LDP) and the underlying interior gateway protocol (IGP) ensures that LDP is fully established before the IGP path is used for forwarding traffic.

To enable LDP IGP synchronization on each interface that belongs to an OSPF or IS-IS process, enter the mpls ldp sync command. If you do not want some of the interfaces to have LDP IGP synchronization enabled, issue the no mpls ldp igp sync command on those interfaces.

Nov 5, 2022 · To enable LDP IGP synchronization on each interface that belongs to an OSPF or IS-IS process, enter the mpls ldp sync command. If you do not want some of the interfaces to have LDP IGP synchronization enabled, issue the no …

In Cisco IOS, this is done by using mpls ldp igp sync command from router configuration mode. (NOTE: Cisco IOS supports LDP-IGP Synchronization only for OSPF). By default, if the peer is...

Aug 23, 2007 · Simply, LSP is a sequence of LSRs used to forward labeled packets of a certain FEC (An LSP is simillar to FR or ATM VC), while LDP is the protocol used for label distribution in the MPLS domain (it can be Cisco proprietary TDP or the standard LDP).

Mar 19, 2022 · The MPLS LDP IGP synchronization feature ensures that LDP is fully established before the IGP path is used for switching. This feature is supported only on interfaces running Open Shortest Path First (OSPF) or Intermediate

- LDP is required to automatically signal the LSP's based on the best next-hops calculated by the underlying IGP by advertising labels (based on next hops) to directly connected LDP neighbors throughout the MPLS domain of the Service Provider.

Configure the time the LDP waits before informing the IGP that the LDP neighbor and session for an interface are operational. For large networks with numerous FECs, you might need to configure a longer value to allow enough time for the LDP label databases to be exchanged.