This read-create value associates a preferred route identifier with this connection, where a value of 0 means no preferred route is associated. An admin uses this to steer the switch's path selection toward a specific pre-defined route for this connection rather than leaving routing entirely to the switch's default algorithm. For example, if a particular physical path is known to offer better latency for a given SPVC, the admin would set this object to that route's identifier so the switch prefers it, and setting it to 0 clears the preference and also automatically clears cwaChanDirectRoute.