[ovs-discuss] Linking multiple VM with remote OVS

Jesse Gross jesse at nicira.com
Wed Sep 5 17:14:23 UTC 2012


On Wed, Sep 5, 2012 at 3:51 AM, Farrow, Paul <pwfarr at essex.ac.uk> wrote:
> Thanks for the info, I have tried with and without floodlight to the same effect. I had thought that gre tunnels allowed layer 2 packets by forwarding ethernet frames  using IP and then stripping the IP header back to Ethernet when they reached the end of the tunnel? Do they not work in this way or is it that this will not work with OVS in this way?

You're talking about the outer header but I'm talking about the inner
one.  GRE packets can encapsulate either Ethernet frames or raw IP
directly.

> Is there any other method you can think of to link them up as an alternative to the methods I have tried? Would a L2TP tunnel work?

You should use the GRE support built into OVS.  If that doesn't work
then something else is the problem.



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