PMF - Parameter Management Frames
The PMF protocol is optional; it may (or may not) be implemented. If an adapter that does not support parameter management frames receives a PMF, it will respond by sending a RDF.
PMF supply FDDI node management. PMF are used to query (PMF Get) or set (PMF Set) FDDI MIB parameter values.
PMF Get
PMF queries are performed this way:
1. A PMF Get request is sent to the queried station.
2. The queried station answeres with a PMF Get response.
Parameters may be queried one or multiple at a time.
PMF are sent in common SMT TLIV format omitting the parameter value.
PMF Get Response frames contain these parameters: reason parameter; time stamp parameter; further parameters concerning the PMF Get request.
Para- Frame
meter Class PMF/RDF Response (Reason)
========== ======== =======================================================
0x00000001 RDF FrameClassNotSupported
The queried class is not supported.
0x00000002 RDF FrameVersionNotSupported
SMT version not supported.
0x00000003 PMF Success
Operation successfully completed.
0x00000004 PMF BadSetCount
Multiple stations try to access the same parameter.
This results in retransmission of the PMF Set Request
frame.
0x00000005 PMF IllegalOperation
Illegal PMF Set command.
0x00000006 PMF NoParameter
Unknown parameter type.
0x00000008 PMF/RDF OutOfRange
Parameter value exceeds the allowed range.
0x00000009 PMF NotAuthorized
Unauthorized PMF Request.
0x0000000A PMF/RDA LengthError
Length of queried parameter is invalid.
0x0000000B PMF FrameTooLong
PMF Response exceeds the maximum allowed
SMT frame length.
0x0000000D RAF SBADenied
Synchronous bandwidth allocation denied.
RAF - Resource Allocation Frames
Param.
Type PMF Get Response
====== =====================================================================
0x0012 ReasonCode
Code of (un)successfull operation completion.
0x1033 TimeStamp
Current information's time stamp.
0x1035 SetCount
Optional PMF Set operation function.
0x1036 LastSetStationID
SMT station ID of the node that last changed the queried station's
MIB.
PMF Set
The PMF Set command is used to change parameter values of another FDDI node.
In order to avoid multiple MIB access by more than one PMF Set request frames the PMF Set function has to be preceeded by a PMF Get request frame. The queried station maintains a PMF Get request counter as well as a PMF Set request counter. A PMF Set command is valid only if both counter's values are equal.
PMF Set Response frames contain these parameters: reason code; time stamp; new set count; LastSetStationID; values of changed parameters. This functions as a positive or negative acknowledgment.
Param.
Type PMF Set Request
====== =====================================================================
0x0021 Authorization
Optional password.
0x1035 SetCount
Optional PMF Set operation function: sequence number of PMF Set
operations.
0x103C SMTStationAction
Connect/disconnect; path/selftest; disable port A, B or M.
0x10FE SMTVendorAction
Commands concerning SMT commands implemented by manufacturer.
0x20FE MACVendorAction.
Commands concerning SMT commands implemented by manufacturer.
0x32FE PathVendorAction
Commands concerning the path object implemented by manufacturer.
0x4046 PortAction
PCM maintenance, enable, disable, start, stop.
0x40FE PortVendorAction
Commands concerning the port object implemented by manufacturer.
0x0016 SBACommand
Synchronous bandwidth allocation.
Param.
Type PMF Set Response
====== =====================================================================
0x0012 ReasonCode
Code of (un)successfull operation completion.
0x1033 TimeStamp
Current information's time stamp.
0x1035 SetCount
Optional PMF Set operation function: sequence number of PMF Set
operations.
0x1036 LastSetStationID
SMT station ID of the node that last changed the queried station's
MIB.