SMT - Station Management Protocol
The SMT protocol provides station management and ring maintenance by the FDDI adapters.
Each adapter's SMT function has a MIB holding FDDI ring management data.
FDDI management data are specified by ISO standard 1.0.9314.1, but it is also part of CMIP (1.0.9596.2) and SNMP (1.3.6.1.2.1.10.15) management platforms:
iso(1).standard(0).fddi(9314).mib(1).fddiSMTpkg(1)
iso(1).standard(0).fddi(9314).mib(1).fddiMACpkg(2)
iso(1).standard(0).fddi(9314).mib(1).fddiPATHpkg(3)
iso(1).standard(0).fddi(9314).mib(1).fddiPORTpkg(4)
iso(1).standard(0).fddi(9314).mib(1).fddiSMT(16)
iso(1).standard(0).fddi(9314).mib(1).fddiMAC(32)
iso(1).standard(0).fddi(9314).mib(1).fddiPATH(50)
iso(1).standard(0).fddi(9314).mib(1).fddiPORT(64)
iso(1).standard(0).ips-osi-mips(9596).cmip(2)
iso(1).org(3).dod(6).internet(1).mgmt(2).mib(1).transmission(10).fddi(15)
SMT frames are tolerant concerning ring delays. SMT responses may take up to 30 seconds (and even more) in order to protect real-time applications: FDDI adapters do not reply to SMT request frames at a higher priority. SMT response frames are related to the corresponding SMT reply frames by Transaction ID (4 bytes) (FDDI).
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NIF - Neighbor Information Frames
PMF - Parameter Management Frames
RAF - Resource Allocation Frames
SIF - Status Information Frames