RSVP/6/NOTIFY_LSPM_GR_START:RSVP GR starts.
RSVP notified LSPM that RSVP GR started.
1. RSVP GR was configured, but the undo mpls rsvp-te command was run immediately, and then the LSP was not deleted.
2. Before the active/standby switchover, the router already had the RSVP GR capability.