This read-create object holds the 32-bit logical port identifier of the egress port on the associated PNNI node for this network element of a preferred route. Combined with cwaPrefRouteNwElemNodeId, it pins down not just which node but which specific egress port the preferred route must use at that hop. An admin steering traffic to leave a particular node via a specific uplink port, rather than any available port, would set this port ID accordingly.