LDP terminology

Table 1. LDP terminology
Apply Current Route Compare the current route with the received label mappings and install any downstream mappings, as appropriate.
Current Route Current next hop info for a FEC. The current route may not be applied immediately to the current label mapping as a result of LWD at ingress.
Downstream mapping (DM) Represents the label mapping received from a downstream peer for a FEC.
FEC Forwarding Equivalency Class. Each FEC is a destination IP address for an LDP tunnel.
LDP Label Distribution Protocol.
Label mapping LDP message that indicates the label to be used for an FEC from the peer.
LSP Label Switched Path.
LWD Label Withdrawal Delay.
Route event Update from the routing table to LDP.
Upstream Mapping Represents the label mapping sent to an upstream peer for a FEC.