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Performance data is displayed in zeros when the Metro 1000 performance is queried.

Publication Date:  2012-07-25 Views:  48 Downloads:  0
Issue Description
When performance data of the Metro 1000 is queried on the network management system, performance data is returned in many zeros to the network management system. When the per-get-curdata command is used for a query, performance data of the value 0 can be displayed. When the per-get-allcurdata command is used for a query, performance data of a value other than 0 can be displayed. 
Alarm Information
None. 
Handling Process
1. When you query performance data on the network management system, functions differently for an OptiX 155/622H NE and other NEs.
On the network management system, functions as follows:
? If this option is not selected, the network management system directly displays the current performance values queried from the NE.
? If this option is selected, the network management system directly displays the current performance values queried from the NE and also displays the monitored performance items (in zeros) that are not reported by the NE in the current performance period.
2. After the option is selected, the network management system displays a large amount of performance data in zeros of OptiX 155/622H NEs. The reason is that the current performance values that the network management system queries from OptiX 155/622 NEs include the value zero. Performance report of various NEs is implemented differently, but the difference does not affect normal use of the NEs. 
 
Root Cause
Queries of the current performance are processed on the network management system as follows:
When the current performance data is queried, the count of the current performance events is returned. To reduce the amount of reported data, the network management system suppresses zeros in the returned data (except measurements), that is, allows NEs to report nonzero data instead of zero performance data. Measurements may be of temperature, electric current, and so on. Measurements are counted differently from general performance events: Zero does not mean that there is no count but represents the current numerical value. Hence, zeros cannot be suppressed. 
 
Suggestions
This problem involves a large amount of case-shape equipment. It is recommended that modifications be made on the network management system to solve the problem. 

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