Label Distribution Protocol - LDP

LDP

The Label Distribution Protocol (LDP) is a protocol defined by the IETF (RFC 5036) for the purpose of distributing labels in an MPLS environment. LDP relies on the underlying routing information provided by an IGP in order to forward label packets. The router forwarding information base, or FIB, is responsible for determining the hop-by-hop path through the network. Unlike traffic engineered paths, which use constraints and explicit routes to establish end-to-end Label Switched Paths (LSPs), LDP is used only for signaling best-effort LSPs.