A read-write boolean, true(1) or false(2), enabling or disabling loopback detection on a specific port. This lets an admin control loopback detection at a per-port granularity, useful for excluding specific ports, such as those intentionally looped for testing, from the feature while leaving it active elsewhere. An admin intentionally looping a port for a cable test would set this to false(2) on that port to avoid triggering a false loopback alarm.