Default:  0            Value:  0-255

    When operating over CLNS, indicates network priority encoded in
    NPDU header for all transmitted packets. It may be used by
    intermediate systems to assign the packets to queues of
    appropriate priority.

    set  [node node-id] osi transport template template-id -
         network priority integer

    Example:

    set osi transport template osit$loop_clns -
         network priority 0