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Is there any solution based on openvswitch ? If using vxlan to encapsulate containers L2 frames, the openvswitch kernel module should be able to route packets very well with much lower overhead than any userspace solution that do not access the nic memory directly.

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SocketPlane or OVN.

I haven't seen those used in the wild yet, but fwiw, weave is working on a 'fast data path' that uses the same kernel path as ovs

OVN is 0.1 fairy dust and unicorn horns at the moment, looks very promising but you're most likely going to be waiting another 12 months before its solving your problems.

SocketPlane was bought by Docker and is now DEAD, to become whatever Docker decides is good enough to silence their critics. "See we bought these network guys, we swear we're taking networking and plugins seriously!"

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