Cabletron Systems MICROMMAC, 42T KBytes Received, Errors Received, Beacon States, Ring Purges

LOCAL MANAGEMENT

KBytes Received

This field displays the sum in kilobytes of frames received by the MicroMMAC-T.

Errors Received

This field displays the Isolating and Non-Isolating Errors (described below) detected on the ring.

Beacon States

This field displays the beacon conditions detected on the ring. Stations transmit beacons when they detect bit streaming or signal loss on the ring.

Ring Purges

This field displays the ring purge frames transmitted by the active monitor.

Active Monitor Changes

This field displays the number of times the active monitor has changed.

ISOLATING ERRORS

Isolating Errors are “soft” ring errors that indicate the domain of a fault. That is, the active monitor can isolate the fault’s region to the transmitting adapter, the receiving adapter, the cable, and the components between them. The errors are described below:

Line Errors

This field displays the total line errors detected on the ring. Line Errors are corrupted frames that are detected by a node. This type of error normally occurs when stations enter and leave the ring.

This error can also indicate a problem with the receiver of the reporting node, or the transmitter of its Nearest Active Upstream Neighbor (NAUN), or the cabling and hub hardware between them.

Burst Errors

This field displays the total burst errors detected on the ring. Burst Errors are the absence of clocking signals at a node’s receiver. This error normally

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