VMS Help LANCP, SET, DEVICE parameters, Qualifiers, /SR_ENTRY  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /SR_ENTRY=(LAN_ADDRESS=address, RI=routing-information)
       /NOSR_ENTRY=(LAN_ADDRESS=address)

    Statically defines a specific source-routed route for a specific
    node. The default value is no routes specified. This caching
    remains valid while used or until the aging timer expires.

    Use this qualifier only as a last resort when isolating
    communication failures on extended LAN topologies.

    The /NOSR_ENTRY=(LAN_ADDRESS=address) qualifier, clears the
    previously defined static source routed route.

    The address is a standard 6-byte LAN address (given as
    hexadecimal byte characters separated by hyphens), which
    specifies the canonical form of the address. Using a colon as
    the separator character indicates the bit-reversed form of the
    address.

    The routing-information is the source routing field, specified as
    a series of two-byte hexadecimal characters (each byte separated
    by a hyphen). The field consists of a two-byte routing control
    field followed by up to 14 two-byte segment identifiers, each
    containing the ring number and the bridge number used in the hop.