[ovs-discuss] multiple GRE on OVS

Alex Wang alexw at nicira.com
Fri Jul 5 16:17:44 UTC 2013


Hey,

Also, could you check if there is traffic on the link?

e.g. the "ovs-dpctl dump-flows" output, or "tcpdump" output

There may be some broadcast packets looping and jamming the link.

Kind Regards,
Alex Wang,


On Mon, Jul 1, 2013 at 10:31 AM, Jesse Gross <jesse at nicira.com> wrote:

> 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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