[ovs-discuss] multiple GRE on OVS

Jesse Gross jesse at nicira.com
Mon Jul 1 17:31:20 UTC 2013


On Sun, Jun 30, 2013 at 2:47 PM, othmane <douiriothmane at gmail.com> wrote:
> Hi all,
>
>
>
> I’ve established a gre tunnel between two virtual machines and it worked
> fine, however, when I try to establish another one over the same link and
> between two other VM, its doesn’t work at all, the ping failed. My setting
> is like this:
>
>
>
> I have two host H1 and  H2: in H1, I have 2 VM: VM1 (192.168.10.5) attached
> to bridge br1 192.168.10.7 and VM2 (172.16.30.5) attached to br2 172.16.30.7
> and ovs (10.180.121.70). In H2 I have 2 VM: VM3 (192.168.10.6) attached to
> bridge br1 192.168.10.8 and VM4 (172.16.30.6) attached to br2 172.16.30.9
> and ovs (10.180.121.41). I have also br0 attached to the physical interface
> on both H1 and H2. As I said when I set the second GRE tunnel between VM2
> and VM4 ,the same way I set the first one, it doesn’t work, I can’t even
> ping  between the two br2. The “route –n” is correct.

You need to set a key to distinguish the tunnels from each other.
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