[ovs-discuss] ovs route refresh problem

Ben Pfaff blp at ovn.org
Thu Feb 15 00:26:31 UTC 2018

On Sun, Feb 11, 2018 at 07:27:34AM +0000, Yinpeijun wrote:
> Hi all
>                 Recently , I run a test two VM commulication with vxlan and ovs+dpdk networking(ovs2.7.2). when I add 200 virtual device on the physical service  of
> the commulicate vm then check the ping result,  there  is  loss packet statistics. Then I use vlan and ovs+dpdk networking, do the same thing , there is no loss
> packets statistics.
>                 I read the source code and add some log to confirm the problem,  the final problem I think is unreasonable routing refresh,  in route_table_rest function
> delete all items before readding, so in the middle of the interval  ovs_router_lookup  can not find the route then cause packet drop.  So I think the implementation
> need to optimize, Any advice on how to optimize it?

I don't fully understand your use case.  However, if you're not using
DPDK, then OVS isn't doing routing in userspace so this is probably not
the problem.

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