sflow 1 destination 10.0.0.50 owner 1 timeout 4294967295
sflow 1 polling ethernet 1/g1-1/g10 30
sflow 1 sampling ethernet 1/g1-1/g10 512
A previous posting discussed the selection of sampling rates. Additional information can be found on the Dell web site.
See Trying out sFlow for suggestions on getting started with sFlow monitoring and reporting.