Cabletron Systems SPECTRUM TRMMIM - Manual (Page 71)

Viewing Ring-level Information 3-21
Ring Map
Viewing Beacon History
The Beacon History window displays a record of significant ring events,
including active monitor changes, ring purges, and information related to
beaconing states. The information displayed in this window will update after
each polling interval.
To open the Beacon History window:
1. Click on at the top of the Ring Map window.
2. Drag down to Beacon History, and release. The Beacon History window,
Figure 3-11 , will appear.
Figure 3-11. The Beacon History Window
The Beacon History window contains the following information:
Active Monitor Changes
Displays the number of times the ring’s active monitor has changed since the ring
was first initialized or the device was last reset.
Ring Purges
Displays the number of times the active monitor has purged the ring. This
includes the purge at the end of the active monitor selection process.
Note that this count is not reset when the active monitor changes.
Beacon Events
This field detects the number of beaconing occurrences detected by the active
monitor on the ring. A beacon is transmitted when a hardware error — such as a
wire fault, frequency error, or ring signal loss — is detected on the ring, and when
monitor contention times out.