The RSVP authentication lifetime is set to prevent RSVP authentication from being prolonged when CR-LSP flapping causes frequent reestablishment of RSVP neighbor relationships and repeatedly performed handshake.
Context
RSVP neighbors retain an RSVP neighbor relationship within a specified RSVP authentication lifetime even if there are no CR-LSPs between the RSVP neighbors. Configuring the RSVP authentication lifetime does not affect existing CR-LSPs.