This is the hold time, in seconds (1-65535), this dynamically-signaled tunnel waits after recovering before automatically reverting to active in its tunnel group, assuming reversion is enabled. An admin sizes this the same way as for static tunnels, but here also accounting for the extra time RSVP-TE re-signaling itself takes to complete and stabilize before the hold timer's clock should even start counting cleanly. For example, a reversion timeout of 120 seconds on a dynamic tunnel gives it two full minutes of confirmed signaled stability before switching traffic back, filtering out a link that flaps right after recovering.