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15.1 Threshold Performance Monitoring
15.1 Threshold Performance Monitoring
Thresholds are used to set error levels for each PM parameter. You can set individual PM threshold
values from the Cisco Transport Controller (CTC) card view Provisioning tab. For procedures on
provisioning card thresholds, such as line, path, and SONET thresholds, refer to the Cisco ONS 15454
Procedure Guide.
During the accumulation cycle, if the current value of a PM parameter reaches or exceeds its
corresponding threshold value, a threshold crossing alert (TCA) is generated by the node and displayed
by CTC. TCAs provide early detection of performance degradation. When a threshold is crossed, the
node continues to count the errors during a given accumulation period. If zero is entered as the threshold
value, generation of TCAs is disabled, but performance monitoring continues.
Change the threshold if the default value does not satisfy your error monitoring needs. For example,
customers with a critical DS-1 installed for 911 calls must guarantee the best quality of service on the
line; therefore, they lower all thresholds so that the slightest error raises a TCA.
When TCAs occur, they appear in CTC. An example is T-UASP-P in the Cond column (shown in
Figure
is appended to the TCA description, as indicated by the red circles in
the TCA is associated with the receive direction, and TX indicates that the TCA is associated with the
transmit direction.
Figure 15-1
TCAs Displayed in CTC
Table 15-1
Cisco ONS 15454 Reference Manual, R8.5
15-2
15-1), where the "T-" indicates a threshold crossing. For certain electrical cards, "RX" or "TX"
shows the electrical cards for which RX and TX are appended to the TCA descriptions.
Chapter 15
Performance Monitoring
Figure
15-1. The RX indicates that
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