Cisco ONS 15454 DWDM Installation And Operation Manual page 387

Chapter 8 Monitor Performance
Table 8-1
Variable
8b10bInvalidOrderedSets
8b10bStatsEncodingDispErrors
From the Alarm Type drop-down list, indicate whether the rising threshold, falling threshold, or both the
Step 7
rising and falling thresholds will trigger the event.
From the Sample Type drop-down list, choose either Relative or Absolute. Relative restricts the
Step 8
threshold to use the number of occurrences in the user-set sample period. Absolute sets the threshold to
use the total number of occurrences, regardless of time period.
Step 9 Enter the appropriate number of seconds for the Sample Period.
Step 10 Enter the appropriate number of occurrences for the Rising Threshold.
Note
Enter the appropriate number of occurrences in the Falling Threshold field. In most cases, a falling
Step 11
threshold is set lower than the rising threshold.
Note
Click OK to complete the procedure.
Step 12
Step 13 Return to your originating procedure (NTP).
September 2004
MXP_MR_2.5G/MXPP_MR_2.5G Threshold Variables (MIBs) (continued)
For a rising type of alarm, the measured value must move from below the falling threshold to
above the rising threshold. For example, if a network is running below a rising threshold of
1000 collisions every 15 seconds and a problem causes 1001 collisions in 15 seconds, the excess
occurrences trigger an alarm.
A falling threshold is the counterpart to a rising threshold. When the number of occurrences is
above the rising threshold and then drops below a falling threshold, it resets the rising threshold.
For example, when the network problem that caused 1001 collisions in 15 minutes subsides and
creates only 799 collisions in 15 minutes, occurrences fall below a falling threshold of 800
collisions. This resets the rising threshold so that if network collisions again spike over a 1000
per 15-minute period, an event again triggers when the rising threshold is crossed. An event is
triggered only the first time a rising threshold is exceeded (otherwise, a single network problem
might cause a rising threshold to be exceeded multiple times and cause a flood of events).
Definition
Total number of ordered sets not complaint to GE/FC (Gigabit
Ethernet/Fibre Channel) standard
Total number of code groups that violate GE/FC disparity errors
Cisco ONS 15454 DWDM Installation and Operations Guide, R4.7
DLP-G153 Create RMON Alarm Thresholds
8-29