SIF - Status Information Frames

SIF are used for checking station state, for isolating ring errors, for maintaining a ring map.

There are two types of SIF frames:

> SIF Configuration - request / response

> SIF Operation - request / response

SIF response frames contain the following parameters:

Param.

Type SIF Configuration Response

====== =====================================================================

0x0002 StationDescriptor

Number of MACs including: addresses; number of ports; port type;

station type (workstation or concentrator).

0x0003 StationState

Topology information (order of MACs and ports attached to the ring);

station's wrap status.

0x0004 MsgTimeStamp

Current message's time stamp.

0x0005 StationPolicies

Treatment of port type (example: if port type A to port type A

is allowed).

0x0006 PathLatencyContribution

Station's signal delay.

0x0007 MACNeighbors

MAC address neighbor station.

0x0008 PathDescriptor

Neighbor stations assigned to path.

0x0014 SMTSupportedVersion

SMT versions (current version / supported version).

0x1035 SetCount

Optional PMF Set operation function: sequence number of PMF Set

operations.

NIF - Neighbor Information Frames

Param.

Type SIF Operation Response

====== =====================================================================

0x0004 MsgTimeStamp

Current message's time stamp.

0x0009 MACStatus

MAC timers (T_Neg, T_Req, T_Min, T_Max, TVX etc.);

frame counters (total frames, error frames, lost frames,

frames not copied); synchronous bandwidth.

0x000A PortLEMStatus

LER counger, LER threshold, estimated line quality.

0x000B MACFrameCounters

Counters: MAC frame copied, frame transmit.

0x000C MACFrameNotCopiedCount

Counter: MAC frame not copied.

0x000D MACPriorityValues

Access priorities.

0x000E PortEBStatus

Error counter: elasticity buffer.

0x000F ManufacturerField

Manufacturer ID; OUI field; data field.

0x0010 UserData

32 bytes of user data.

0x1035 SetCount

Optional PMF Set operation function: sequence number of PMF Set

operations.

NIF - Neighbor Information Frames