This reflects whether an operator has administratively enabled this dynamically-signaled one-directional tunnel, which -- unlike a static tunnel -- also gates whether RSVP-TE is even permitted to attempt signaling it. An admin disabling this on a dynamic tunnel stops all future signaling attempts entirely, not just current traffic, which matters when troubleshooting since a disabled dynamic tunnel won't even show up trying to establish an LSP. For example, an admin toggling this to disabled during a maintenance window prevents the tunnel from attempting to re-signal around a link they're intentionally taking down.