The Token Ring module implements one of multiple possible Link
    level/Physical level modules in the OSI layered architecture model.

    The DNA IEEE 802.5/Token Ring Data Link provides either a
    4 or 16 Mbps local area network (LAN). It provides communication
    services for multiple concurrent users. The services provided are
    LLC, Mapped Ethernet and Station Management (SMT) services.

    The DNA IEEE 802.5/Token Ring module incorporates the
    functions and operations defined in the IEEE 802.5 Token Ring
    Access Method, parts of the ISO 8802-1 (IEEE 802.1) Addressing,
    Internetworking and Network Management, and parts of the
    ISO 8802-2 (IEEE 802.2) Logical Link Control (LLC) specifications.
    To this, the DNA 802.5/Token Ring Data Link adds features often
    needed by users of the data link. A typical such user is the
    Network Layer of the Digital Network Architecture (OSI).

1  –  Subentities

    The entity hierarchy of the Token Ring module is:

    Node___Token_Ring____Port
                       |
                       |_Station____Source_Route
                                  |
                                  |_FA_Map

    The TOKEN RING entity is the top-level entity in the hierarchy of
    entities belonging to the Token Ring module.

    A TOKEN RING PORT entity represents an access point to the service
    offered by the Token Ring module.  A client transmits and
    receives data through a port.  Ports are created and deleted by
    client use of open and close service interface procedures.
    The port-name refers to the port managed by this command.

    A TOKEN RING STATION entity manages a Token Ring controller. Each
    station corresponds to a particular instance of Logical
    Link Control (LLC), Medium Access Control (MAC), and physical
    attachment. The Token Ring data link can be monitored and controlled
    through DNA network management. The station-name refers to the
    station managed by this command.

    A TOKEN RING STATION SOURCE ROUTE entity describes an entry in the
    Source Routing database. In Transparent Source Routing, the Source
    Route entities are typically created and enabled by the parent
    Station entity. The sourceroute-id refers to the source route
    entity managed by this command.

    The TOKEN RING STATION FA MAP (Functional Address Mapping) entities
    describe the default Functional Address-Global Address mapping to be
    applied to ports that are created with the same protocol identifiers.
    The famap-id refers to the FA map entity managed by this command.