This read-write integer (1-15) sets a connection's routing priority or class of service, which the PXM controller uses to decide which connections take precedence when choosing paths or allocating resources during routing decisions. Admins assign higher priority values to more critical connections so that, when the network must choose among competing connections (for instance during rerouting after a failure), the more important ones are favored. For example, an admin might assign a high ausmRoutingPriority to a customer's premium SLA connection so PXM prioritizes finding it a path over lower-priority best-effort connections during network reconfiguration.