This carries the type -- static, dynamic, or FRR -- of whichever tunnel is currently active within a protection group at the time of the trap, telling the admin what kind of path the group just switched onto. This matters because a failover onto an frr(3) backup behaves differently operationally (temporary, expected to revert) than a failover onto a separately dynamic(2)-signaled standby tunnel. For example, seeing the newly active tunnel reported as type frr(3) tells the admin this is a fast-reroute backup that should automatically revert once the primary recovers, rather than something requiring manual intervention.