[ovs-discuss] performance drop 60% when using vxlan tunnel

yinpeijun yinpeijun-joy at 163.com
Wed Nov 12 15:05:30 UTC 2014

As I konow, when use vxlan tunnel to test, you should increase the physical nic mtu at least 50 bytes. 

>I tried to set vxlan1 interface MTU by below, no luck.
>ovs-vsctl add-port ovs-br0 vxlan1 -- set interface vxlan1 type=vxlan
>options:remote_ip= options:key=99 options:dst_port=4789 options:df_default=true mtu=9000

>In case1: performance 400Mbps
>VM -> tap -> ovs-bridge -> eth1

>Configuration is same as Case2, only without vxlan interface.
>Both tap and eth1 observed bigger packet size.

>Any tips/suggestion could be welcome.

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