RSVP LSP Hierarchy Terminology

The following terminology is used to describe functionality related to the RSVP LSP hierarchy:

Forwarding adjacency LSP—An RSVP LSP used to tunnel other RSVP LSPs; forms the basis for a forwarding adjacency.
Forwarding adjacency—A traffic engineering link created by a forwarding adjacency LSP. You can create a forwarding adjacency between two routers in a network by configuring a forwarding adjacency LSP. Forwarding adjacencies can only be statically configured. However, you can configure Open Shortest Path First (OSPF) to advertise the forwarding adjacency to other routers. When an RSVP LSP traverses a forwarding adjacency, existing Multiprotocol Label Switching (MPLS) features such as fast reroute continue to function.