Alarm Configuration
AC Errors | Also known as ARI/FCI errors, AC errors occur during |
| the Ring Poll or Neighbor Notification process when one |
| station fails to correctly set the ARI (address recognized) |
| and FCI (frame copied) indicator bits on the current AMP |
| (active monitor present) or SMP (standby monitor |
| present) frame intended for it, thus leaving its |
| downstream neighbor without an accurate upstream |
| neighbor’s address. AC errors are detected when a |
| station receives more than one AMP frame with ARI and |
| FCI bits still set to 0 without seeing an intervening SMP |
| frame with its bits set to 1, or when the station detects an |
| SMP frame with its ARI and FCI bits set to 0 without |
| having seen an AMP frame with its ARI and FCI bits set |
| to 1. When a station detects an AC error, it stops the Ring |
| Poll process by not issuing its own SMP frame; no other |
| ring recovery procedures are initiated. |
Congestion | A congestion condition occurs when a station recognizes |
Errors | a frame addressed to it, but is unable to copy the frame |
| because it has no available buffer space. Although this |
| may indicate a station which is performing poorly, no |
| ring recovery procedures are initiated. Note that the |
| count of congestion conditions reflects the number of |
| times frames have been dropped, not the number of |
| frames dropped. |
The Station List box lists the stations detected on the selected ring, the module and port through which they are connected, the name of the station (if one has been assigned), and the status and threshold of the alarm type highlighted in the alarm list.
NOTE |
NOTE |
A station listed at module and port 0 is part of the
The Threshold field allows you to configure a new threshold for the selected alarm type; the new threshold will be applied as indicated by the current selection in the Set Alarm For field.
When setting thresholds for
Setting and Viewing Station Alarms |
