[ovs-discuss] ovs throughput

[Bruce Hartpence]

Hello everyone - I am running OVS with five connections: 4 VMs and an external link.

During VM to VM iperf3 tests, I noticed unicast traffic being dumped to the external link. We see this behavior in hardware with the SAT gets full. Dropping the windows size prevents this from happening. I also see that tcpdump drops packets on interfaces even with a substantial increase in buffer size.

So, my question is in the provisioning of OVS, does this seem like a VM resource problem, OVS throughput problem or something else. It seems odd that I can overrun OVs with so few nodes.

Bruce Hartpence
Professor, IST Dept., RIT
585-475-7938
bhhics at rit.edu

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