Configuring the Global Settings for Netflow Collector and Timers
The global settings for Netflow can be configured in the CLI:
config system netflow
set collector-ip <address>
set collector-port <port>
set source-ip <address>
set active-flow-timeout <integer>
set inactive-flow-timeout <integer>
end
The value for active-flow-timeout is used as the minimum length of a live session, as well as for the intervals to send the report. The default is 1 minute, meaning that if a session lives for a minute, it will be reported in a Netflow packet.
The value for inactive-flow-timeout is used as the interval to send a Netflow report of inactive (finished) flows. Since FortiOS uses 1350 Byte payloads, the number of reports in a packet are limited and multiple packets may be sent regardless of this timer.