Sets the priority of the DECnet Phase IV distance-vector-based routing protocol on the router port for which the entry exists. Within an area, the router with the highest value for nwDecIVProtoIfPriority becomes the priority or designated router. The highest possible value for nwDecIVProtocolIfPriority is 127. Set this value high to cause your DECnet Phase IV Routing Services-enabled device to become the designated router. Set this value low to guarantee that it does not become the designated router.