set netflow template

Use this command to configure the NetFlow Version 9 template refresh rate and timeout values.

Syntax

Parameters

Defaults

At least one of the refresh-rate or timeout parameters must be specified, although both can be specified on a single command line.

Mode

All command modes.

Usage

Version 9 template records have a limited lifetime and must be periodically refreshed. Templates are retransmitted when either:

• The packet refresh rate is reached, or
• The template timeout is reached.

Template refresh based on the timeout period is performed on every blade. Since each module handles its own packet transmissions, template refresh based on number of export packets sent is managed by each blade independently.

The refresh rate defines the maximum delay a new or restarted NetFlow collector would experience before it learns the format of the data records being forwarded. Refresh rates affect NetFlow collectors during their start up when they must ignore incoming data flow reports until the required template is received.

Setting the appropriate refresh rate for your Extreme Networks S- or K-Series system must be determined, since the default settings of a 20 flow report packet refresh rate and a 30 minute timeout may not be optimal for your environment. For example, a switch processing an extremely slow flow rate of, say, 20 flow report packets per half hour, would refresh the templates only every half hour using the default settings, while a switch sending 300 flow report packets per second would refresh the templates 15 times per second.

Extreme Networks recommends that you configure your Extreme Networks S- or K-Series system so it does not refresh templates more often than once per second.

Use the show netflow config command (show netflow) to display the currently configured values.