To configure Multiprotocol Label Switching (MPLS)-signaled label-switched paths (LSPs), you create an LSP that runs from the ingress router to the egress router. (For information about Label Distribution Protocol [LDP]-signaled LSPs, see LDP Configuration Guidelines.) To create the LSP, you configure only the ingress router; you do not have to configure any other routers. You can configure the LSP so that the JUNOS software makes all forwarding decisions, or you can configure some or all routers in the path. The LSP is set up by the Resource Reservation Protocol (RSVP) through RSVP-signaling messages. The JUNOS software automatically negotiates, assigns, releases, and reuses labels.
To configure signaled LSPs, perform the following tasks: