On the Rockwell FDDI adapter boards, the rns_smt driver implements the FDDI Station Management protocol ( SMT ). The Station Management protocol includes Connection Management, Ring Management and all frame services. The rns_snt driver is a loadable, clonable STREAMS driver that can support multiple instances of the FDDI interface, as well as multiple application layer clients.
The cloning character-oriented devices /dev/rns_smt are used to access the rns_snt driver that supports Rockwell FDDI adapters. The /dev/rns_smt device is an interface used only for Station Management applications, such as those that gather MIB statistics or other Station information.
The SMT driver supports DLPI and SPI interfaces. All M_PROTO and M_PCPROTO type messages are interpreted as DLPI or SPI. SPI ( SMT provider interface) is a Rockwell proprietary interface that is used during communication between the SMT and related applications. rns_smt is a "style 2" data link service provider, which means that an explicit DL_ATTACH_REQ is required to associate the opened stream with a particular device or physical point of attachment ( PPA ).
interface used for Station Management applications