[ovs-discuss] tunnel between open vswitch on xenservers

terryxing xingtianyi at gmail.com
Wed Oct 5 22:14:43 UTC 2011


Thanks very much.

Can Open VSwitch GRE tunnel support ipv6  ?  Since we have the private ip
address conflicting problem when tunneling different clusters. Each cluster
has its dedicated DHCP server assigning ip addresses. It is possible to
assign the same ip for VM at two cluster. When they are isolated, that is
fine. But when those two cloud hosts are tunneled. that would be a problem.

Is there any solution solving the ip conflicting problem  on open Switch ?
There are multiple VMs with private ip (for example., 192.168.0.2) address
at each host. Any consideration on this concern in Open vSwitch ?

Thanks again

On Sun, Oct 2, 2011 at 2:38 PM, Jesse Gross <jesse at nicira.com> wrote:

> On Oct 2, 2011 1:24 PM, "terryxing" <xingtianyi at gmail.com> wrote:
> >
> > Thanks very much.
> >
> > So you mean, we can not setup the tunnel between two host residing in two
> private network behind the gateway (gw has public ip not the xenserver
> itself.)
> >
> > Since right now, our xenserver hosts are all within the private network
> behind the GW, every traffic must go through the gateway which does the NAT
> port forward to all traffic coming in and out.
> >
> > As you just said, the xenserver host must have no choice but to have
> public ip and connect to the internet not behind the gateway to establish
> the tunnel  ?
>
> You just need IP connectivity between the hosts that are the tunnel
> endpoints. It doesn't matter whether the addresses are public or private.
> Can they ping each other?  If yes, it should be fine.
>



-- 
Best regards,

Terry Xing
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