This toggles whether the switch is allowed to proactively reroute this circuit purely to balance traffic load across trunks, rather than only rerouting in response to an actual failure, letting the admin decide whether a given circuit's path should be considered movable for network-wide load balancing. For example, an admin might leave cktRerouteBalance disabled on a latency-sensitive voice circuit to guarantee path stability, while allowing it on bulk-data circuits so the network can shift them to less-loaded trunks as conditions change.