Sniffer Adaptive Application Analyzer: Adaptive Mode ... - NetScout

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VoIP Options Settings EARLY FIELD TRIAL Chapter 9 236 Sniffer Adaptive Application Analyzer The VoIP Options tab lets you set options specific to Expert analysis of Voice protocols, in particular RTP. Figure 9-8. VoIP Options Dialog Box RTP Packet Gap (ms) -This option tells the Expert to ignore interpacket variations that exceed the stated value when making RFC 1889 jitter calculations. This way, the RFC1889 jitter calculations ignore both legitimate line silence (one reason for large RTP packet gaps) and statistical anomalies, resulting in more accurate calculations. Setting this option carefully will also result in fewer false positive High Jitter alarms. NOTE: This option only affects the Expert's classic RFC1889 jitter calculations (that is, the jitter calculations for the RTP - High Jitter alarm). It does not affect the RTCP - High Jitter alarm or the RTP - High Variation alarm. RTP Inter-Packet Variation - These options let you specify that the Expert use a custom Codec Packet Interval for RTP packets in the equations used to calculate and average the deviation from the expected inter-packet spacing. If this option is not enabled, the Expert uses its traditional RFC1889 method for jitter calculations, using the actual RTP timestamps to calculate inter-packet spacing instead of the Codec Packet Interval.
EARLY FIELD TRIAL Oracle Options Mobile Options Expert Analysis Enable Calculation: Enable this option if you would like the Expert to use the stated Codec Packet Interval to calculate jitter (variation) instead of the timestamps found in the RTP packets. Codec Packet Interval: The value (in ms) to use for RTP packet spacing in jitter\variation calculations. Use the Oracle Options tab to specify the Oracle Error Type numbers (Oracle Error Codes) for which you would like the Expert to generate alarms. Whenever the Expert sees one of the error codes listed here, it will generate the Oracle: ORA Error Type Noticed alarm at the Service layer. Use this tab as follows: Click Add to create a new entry in the grid. Then, type in the numerical error code to be monitored. Click Delete to delete the selected error code from the table. You can modify any entry in the grid by selecting it and revising as necessary. Set the options in the Mobile Options tab to specify how the Expert should analyze Mobile IP data: Enable IP Home Agent Tunnel Analysis Enable GRE Home Agent Tunnel Analysis Report Mobile Reg Error 136 Specifies whether IP Home Agent Tunnel Analysis is enabled. Disabling this option improves Expert performance. Specifies whether GRE Home Agent Tunnel Analysis is enabled. Disabling this option improves Expert performance. Specifies whether a Mobile Registration Reply with a Code value of 136 (Registration Denied by the Home Agent - Unknown Home Agent Address) should be considered when generating Registration Failure Expert alarms. If this option is disabled, Registration Failure alarms will not be generated when registration fails with error code 136. User’s Guide 237
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