sFlow on an Extreme switch
Some brief notes on how to enable sFlow on an Extreme Network Summit 250 switch.
Define where to send sFlow-records
configure sflow collector ip 6343 vr "vr-default"
Configure the sample rate. Here the switch is the configured to look at every 512:th packet. InMon provides recommended settings depending on network and traffic.
configure sflow sample-rate 512
Configure a limit as to how many samples the CPU can process at a time, this avoids the sampling process from having impact on the performance of the switch.
configure sflow max-cpu-sample.limit 2000
Enable sFlow sampling on chosen ports. Remember that sFlow is only sampled on ingress traffic - i.e. traffic coming into the specific port. This means that we have to enable sFlow on at least two ports in order to sample traffic going in both directions.
enable sflow ports 1,2
And of course
save
If I recall everything correctly that is about it. InMon has a good reference for sFlow in general and product specific configuration