An RSVP LSP tunnel
requires close interaction between LMP, RSVP, and OSPF. The following
sequence of events describes how this works:
LMP notifies RSVP and OSPF of the control peer, the control
adjacency, and resources for the TE link.
GMPLS extracts the LSP attributes from the configuration
and requests RSVP to signal one or more specific paths, specified
by the TE link addresses.
RSVP determines the local TE link, corresponding control
adjacency and active control channel, and transmission parameters
(such as IP destination). It requests that LMP allocate a resource
from the TE link with the specified attributes. If LMP successfully
finds a resource matching the attributes, label allocation succeeds.
RSVP sends a PathMsg hop-by-hop until it reaches the target
router.
The target router, on receiving the RSVP PathMsg, requests that LMP allocate a resource based on the signaled parameters.
If label allocation succeeds, it sends back a ResvMsg.
If the signaling is successful, an RSVP LSP tunnel is
provisioned.
