Why is the LDP GR duration in the log longer than 10 minutes, which is the interval of the MPLS Forwarding State Holding timer

After the GR restarter performs an active/standby switchover, LDP GR starts only after route GR is complete. The MPLS Forwarding State Holding timer is started immediately after the active/standby switchover but restarted when route GR is complete. In the log, the GR begin time is the time when the MPLS Forwarding State Holding timer is first started; the GR end time is the time when the MPLS Forwarding State Holding timer expires. Therefore, the LDP GR duration recorded in the log is the sum of the route GR duration and MPLS Forwarding State Holding timer interval (10 minutes).

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