User's Guide

Data Aggregation
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Data Aggregation
Network data displayed in a report is aggregated from your network by the
ExtremeAnalytics engine and sent to Extreme Management Center. The data
gathering process begins with the ExtremeAnalytics engine, which monitors
network activity on the switch or controller you configure using a traffic mirror
and NetFlow or application telemetry. The traffic mirror gathers the first (N)
packets of a flow to determine the application in use, while NetFlow (a flow-
based data collection protocol) provides information about the amount of data
sent and received for the application. The engine holds this information in its
cache and transmits the aggregated data to Extreme Management Center every
five minutes to update the High-Rate data table information and every hour to
update the hourly data table information. Creating a report in the Applications
Browser displays the information sent from the ExtremeAnalytics engine to
Extreme Management Center based on the criteria you select.