On April 29, 2014 at 2:26:18 PM, Hui Kang ([email protected]) wrote:
> Hi,
> I use iperf to test the 10G performance of OVS bridge with vlan tag added
> on the vport for the VMs.
>  
> On each machine, the OVS bridge are created on the Intel 82599 10G NIC. I
> found the performance drops significantly when I added vlan tag on the
> vport of both VMs.
>  
> no vlan tag: 9.47 Gbps
> add vlan tag: 3.96 Gbps
>  
> Is this a normal behavior after adding vlan tag to the packet header?

I don't think that should be happening.  What version of OVS are you running?  
Do you see anything suspicious in your ovs-vswitchd.log?

--Justin



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