[ovs-discuss] Single Bridge GRE Tunnel Not Working

Dmita Levy dlevy022 at fiu.edu
Tue Aug 20 02:43:54 UTC 2013


Hello Jesse,

Thank you for your response. I am replying a month later because we are
finally moving on to the testing phase of our GRE tunneling solution and
getting our testbed setup and configured correctly is turning out to be a
learning experience in itself. In your response below, are you saying that
eth0 should have an IP address and the tunnels should point to that IP? If
so, a number of the tutorials online say to give the bridge an IP and leave
the Ethernet interface blank...so its a bit confusing.

On Mon, Jul 29, 2013 at 8:23 PM, Jesse Gross <jesse at nicira.com> wrote:

> On Mon, Jul 29, 2013 at 5:02 PM, Dmita Levy <dlevy022 at fiu.edu> wrote:
> >
> > Hello,
> >
> > I have attached an image of a simple GRE tunnel that I am testing below
> but I am unable to figure out why it will not work. The setup is one host
> with one bridge (bridge0), directly connected to another host with one
> brige. A GRE tunnel has been specified in OVS with the adjacent bridge as
> the remote IP. Assuming this is correct, why are the packets (ping etc.)
> that are sent between the host not encapsulated in GRE but ARP, Multicast
> etc are encapsulated?
>
> The remote IP address of the tunnel should not be pointing at the
> bridge interface that the tunnels are connected to. It needs to be the
> IP address of the physical interfaces in the system, otherwise packets
> won't actually be able to ingress into the bridge.
>
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