Cabletron Systems SSIM-A8-01 Spezifikationen PDF herunterladen (Seite 21)

9032563 E1 FDDI Application

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FDDI App Views

Threshold A threshold which, when exceeded, causes the generation of a MAC

Condition report. Stations not supporting variable thresholds will have a

value of 0. This ﬁeld can be modiﬁed.

RMT State The current state of the Ring Management (RMT) State Machine. The

possible states are Ring-Op, Isolated, Non-Op, Detect, Non-Op-Dup, Ring-

Op-Dup, Directed, and Trace. These states are deﬁned below.

Ring-Op The ring is functioning normally.

Isolated The device is not attached to the main ring through its A and B ports.

Non-Op The device is attempting to enter the ring.

Detect The claim (beacon) process of the FDDI ring protocol has exceeded one

second; there may be a problem on the ring. In this state, the ring is still

alive, but no data is being transmitted.

Non-Op-Dup The ring is not operational; a duplicate MAC address may have been

discovered during the ring initialization process. This state is unlikely to

occur unless you are using locally administered addresses, as factory-set

MAC addresses are guaranteed to be unique.

Ring-Op-Dup The ring is operational; however, a duplicate address has been detected. Like

Non-Op-Dup, this state is unlikely to occur unless you are using locally-

administered addresses.

Directed The beacon process did not complete within 7 seconds. The device is sending

directed beacons to notify the other stations that a serious problem exists on

the ring, and a Trace state is soon to follow.

Trace A problem exists on the ring that could not be corrected during the

beaconing process, and a Trace has been initiated. During a Trace, the device

sends a signal that forces its nearest upstream neighbor to remove from the

ring and conduct a self-test.

SMT Device Conﬁguration View (Continued)

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Cabletron Systems SSIM-A8-01 Spezifikationen Seite 21