NSR for RSVP OAM and BFD over RSVP

Junos OS extends the nonstop active routing (NSR) support to the RSVP Operation, Administration, and Maintenance (OAM) feature. Nonstop active routing support for RSVP OAM ensures that the OAM state information is maintained across the switchover. Nonstop active routing support for RSVP OAM also enables the BFD sessions over RSVP LSPs to preserve the state information across the switchover, and to come back online after the switchover.