VMS Help TCPIP Services, Routing, GATED, GATED Protocols  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    You can configure GATED to use one or more of the following
    protocols:

    Protocol               RFC        Description

    Routing Information    RFC        RIP is a commonly used interior
    Protocol (RIP)         1058,      protocol that selects the route
    Versions 1 and 2       RFC 1388   with the lowest metric (hop
                                      count) as the best route.

    Open Shortest Path     RFC 1583   Another interior routing
    First (OSPF) Version              protocol, OSPF is a link-state
    2                                 protocol (shortest path first)
                                      and better suited than RIP for
                                      use in complex networks with
                                      many routers.

    Exterior Gateway       RFC 904    EGP exchanges reachability
    Protocol (EGP)                    information between autonomous
                                      systems. An autonomous system
                                      is usually defined as a set
                                      of routers under a single
                                      administration, using an
                                      interior gateway protocol and
                                      common metric to route packets.
                                      Autonomous systems use exterior
                                      routing protocols to route
                                      packets to other autonomous
                                      systems.

    Border Gateway         RFCs       Like EGP, BGP exchanges
    Protocol (BGP)         1163,      reachability information
                           1267,      between autonomous systems
                           1654       but supports nonhierarchical
                                      topologies. BGP uses path
                                      attributes to provide more
                                      information about each route.
                                      Path attributes can include,
                                      for example, administrative
                                      preferences based on political,
                                      organizational, or security
                                      considerations.

    Router Discovery       RFC 1256   This protocol is used to inform
                                      hosts of the availability of
                                      hosts it can send packets to
                                      and to supplement a statically
                                      configured default router.