Cabletron Systems MICROMMAC-22T, 42T manual NON-ISOLATING Errors, Lost Frame Errors

LOCAL MANAGEMENT

•Closed --Indicates that the management station has closed the adapter

•Normal --Indicates the ring is running with no problems, and tokens are being detected by the management station

•Purge --Indicates that the active monitor has issued a ring purge command. Communications will be restored when a new token is released

•Contention --Indicates that the ring has entered into the active monitor contention process to determine a new active monitor for the ring

•Beaconing --Indicates that the management station has detected a beacon frame

•Lobe Fail --Indicates that a station failed the lobe self-test when it attempted to insert into the ring

Ring Number

This field displays the assigned number of rings on the network.

Stations on a Ring

This field displays the number of stations inserted into the ring.

Ports Enabled

This field displays the number of network lobe ports enabled.

Ring Speed

This field displays the ring speed of the MicroMMAC-T as either 4 Mb/s or 16 Mb/s.

NON-ISOLATING ERRORS

Non-Isolating Errors are “soft error” conditions that could have been caused by any station on the ring. Their fault domain cannot be detected.

Lost Frame Errors

This field displays the total number of Lost Frame Errors. These errors occur when the adapter fails to receive the end of the frame it has just transmitted. The frame was lost somewhere on the ring but there is no way to pinpoint where. This can be caused by stations entering or leaving the ring.

4-27