SRF - Status Report Frames
Status report frames are sent unsolicited by FDDI adapters if certain error conditions or error events have been detected.
SRF are sent to a default functional address:
01-80-C2-00-01-00
This functional address must not be mixed up with a similar address '01-80-C2-00-00-00' used by BPDUs (Spanning Tree) in Ethernet LANs. BPDU PCI
SRF are sent permanently after an error occured until (a) a new error event happened or (b) the error condition doesn't exist any longer. SRF are sent in intervals of 2, 4, 8, 16, and 32 seconds.
FDDI stations perform self tests every 2 seconds. Therefore, SRF can't be sent in intervals less than 2 seconds.
SRF may report multiple error events or multiple error conditions.
Param.
Type SRF Notification
====== =====================================================================
0x1033 MsgTimeStamp
Current message's time stamp.
0x1034 TransitionTimeStamp
Time the SRF was sent.
Para-
meter SRF Conditions
====== =====================================================================
0x1047 SMTHoldCondition
Station is in hold state (optional / not often used).
0x1048 SMTPeerWrapCondition
An S-port is attached to an A-port or B-port of this station.
0x208C MACDuplicateAddressCondition
Duplicate MAC address detected.
0x208D MACFrameErrorCondition
Frame Error Ratio exceeded FrameErrorThreshold.
0x208E MACNotCopiedCondition
Frame Not Copied Ratio exceeded FrameNotCopiedThreshold.
0x4050 PortLERCondition
Estimated LER exceeded LER threshold.
0x4052 PortEBErrorCondition
Too many elasticity buffer errors encountered.
0x???? VendorSpecific
Manufactuerer specific messages.
Para-
meter SRF Events
====== =====================================================================
0x208F MACNeighborChangeEvent
MAC address of neighbor station had changed (neighbor station
didn't send NIF within 228 seconds).
0x2090 MACPathChangeEvent
MAC was assigned to another path (only with multi MAC stations).
0x4053 PortPathChangeEvent
Port was assigned to another path (only with multi MAC stations).
0x4051 UndesirableConnectionAttemptEvent
Attempt of undesirable connection (example: port type M to port
type M).
0x???? VendorSpecific
Manufactuerer specific messages.