The value of tmnxPxcPortId specifies the port identifier of the port associated with this PXC entry. A value of '1e000000'H indicates this object has not been configured. When this object is configured, two logical sub-ports are automatically created in tmnxPortTable. These logical sub-ports are used to create two paths within the loop; one upstream path, and one downstream path. These sub-ports are destroyed when either this PXC row is destroyed, this object is de-provisioned.