Tuesday, July 28, 2009

Configuring Extreme switches

The following commands configure an Extreme Networks switch (, sampling packets at 1-in-512, polling counters every 30 seconds and sending the sFlow to an analyzer ( over UDP using the default sFlow port (6343):
enable sflow
configure sflow agent
configure sflow collector port 6343
configure sflow sample-rate 512
configure sflow poll-interval 30
enable sflow backoff-threshold
configure sflow backoff-threshold 100
enable sflow ports all
A previous posting discussed the selection of sampling rates. Additional information can be found on the Extreme Networks web site.

See Trying out sFlow for suggestions on getting started with sFlow monitoring and reporting.

Note: Extreme Networks switches support automatic backoff of sampling rates based on a settable samples-per-second threshold. This mechanism ensures that a poorly selected sampling rate will not generate excessive numbers of samples (see sFlow Version 5, section 4.2.2).

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