Library /sys$common/syshlp/tcpip$ucp_help.hlb SET, SERVICE, Qualifiers, /PROTOCOL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PROTOCOL=protocol [=options]

    Optional. Default: TCP.

    Protocol, and its parameters, that the service will use. To set
    these parameters, use the following options:

    Protocol   Option             Meaning

    IP         TYPE_OF_SERVICE=n  Type of service, expressed as a
                                  value between 0 and 255.
               TIME_TO_LIVE=n     Maximum number of hops that packets
                                  can traverse before being dropped.
    TCP        [NO]DELAY_ACK      Delays the sending of acknowledge
    (Stream                       (ACK) packets.
    socket                        Default: DELAY.
    type)
               DROP_              TCP connection-request timeout
               COUNT=seconds      interval for the service.

                                  Maximum number of seconds to probe
                                  for idle TCP connections before
                                  such a connection times out and
                                  closes.
               PROBE_             Number of seconds between probes
               TIMER=seconds      for idle connections.
    UDP        None               Datagram socket type