[ovs-discuss] vxlan udp csum and openstack ovs performance

Jesse Gross jesse at kernel.org
Thu Jan 21 17:08:47 UTC 2016


On Wed, Jan 20, 2016 at 11:41 PM, 康敬亭 <jingting at unitedstack.com> wrote:
> Hi ALL:
>    We are running openstack J with neutron OVS2.4 using intel 10G
> adapters(82599es) with  vxlan tunnels.
>    We find this patch below to resolve problem of vxlan throughput.
>     http://openvswitch.org/pipermail/dev/2015-August/059335.html
>
>     We modify vport-vxlan.c as the patch,and make the udp csum flag fixed as
> param when calling vxlan_sock_add in func vxlan_tnl_create , but the
> throughput we got does not exceed 3Gbps on the 10Gb link.

OVS 2.4 has VXLAN checksum support built in so you don't need to
modify the code. You can just set the option csum=true on the VXLAN
port.



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