Cabletron Systems TRMMIM manual Last Beacon Type, Longest Beacon

Ring Map

Last Beacon Type

This field displays the type of beaconing frames last detected on the monitored ring. When a beaconing condition begins, the content of the beacon frames varies depending on the condition that caused the beaconing process. Beacon frames are identified by a sub-vector which pinpoints the reason for the adapter’s transmission of beacon frames. Possible beacon types are:

Signal Loss Error	This beacon is transmitted by a station when it detects
	signal loss from its upstream neighbor (most likely
	because of a cable fault), enters monitor contention, and
	monitor contention times out.
	If a station detects signal loss while transmitting
	streamingSignal beacons (the two following entries),
	they will be changed to signalLossError beacons.
	If a station detects a signal while transmitting
	signalLossError beacons, they will be changed to
	streamingSignalNotClaimToken (bit streaming) beacons.
Streaming Signal	This beacon is transmitted by a station when a
Not Claim Token	monitor contention time-out occurs in its adapter while it
	is in monitor contention transmit mode, and it did not
	receive any claim token MAC frames during the monitor
	contention period.
Streaming Signal	This beacon is transmitted by a station when monitor
Claim Token	contention times out while its adapter was in monitor
	contention mode (transmit or repeat), and one or more
	claim token MAC frames were received during the
	contention period. This indicates that monitor contention
	could not be resolved within one second.
Recovery Mode Set	This beacon is transmitted when the ring has begun the
	recovery process.
No Beacon Frames	There has been no beacon condition detected on the
Detected	ring yet.

Longest Beacon

Displays the duration of the longest beaconing occurrence, in an hours:minutes:seconds format.

Last Beacon

Displays the duration of the last beaconing occurrence, also in an hours:minutes:seconds format.

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