[ovs-discuss] poor performance after adding vlan tag to a vport
Justin Pettit
jpettit at nicira.com
Tue Apr 29 21:47:55 UTC 2014
I'd try taking a look at the FAQ, which discusses VLANs quite a bit. In particular, you may want to try the VLAN Splinters workaround.
--Justin
On April 29, 2014 at 2:36:23 PM, Hui Kang (hkang.sunysb at gmail.com) wrote:
> Hi, Justin,
> I used OVS 1.9.3. But there is nothing suspicious in the log when I grep
> for vlan in the log file.
>
> - Hui
>
>
> On Tue, Apr 29, 2014 at 5:28 PM, Justin Pettit wrote:
>
> > On April 29, 2014 at 2:26:18 PM, Hui Kang (hkang.sunysb at gmail.com) 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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