The sFlow reported utilization numbers should be accurate for the physical NICs.
There is no well defined link capacity for a vNIC and so the utilization numbers are meaningless (I believe the Open vSwitch sFlow implementation reports a nominal 100Mbits/s capacity for vNICs). When examining vNIC interface statistics, you should focus on bits/second, packets/second metrics etc. and ignore utilization. CPU utilization metrics for the hypervisor are a better measure of how close the vSwitch is to capacity and of virtual network utilization. http://blog.sflow.com/2011/10/comparing-sflow-and-netflow-in-vswitch.html You can monitor the CPU along with the network traffic if you install a Host sFlow agent: http://host-sflow.sourceforge.net/ Peter On Oct 23, 2012, at 8:52 AM, Giz eudocia <gizeudo...@ymail.com> wrote: > hello, I want to ask, why the sFlow flow statistics from interface counter > value reaches a high number (frame / s) and why the presentation interface > utilization exceeds 100%? this happens when I'm doing port scanning inter-VM > measurements, thanks > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss
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