[ovs-discuss] tunnel between open vswitch on xenservers

[terryxing]

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  ?

On Sun, Oct 2, 2011 at 1:19 PM, Jesse Gross <jesse at nicira.com> wrote:

> On Oct 2, 2011 1:07 PM, "terryxing" <xingtianyi at gmail.com> wrote:
> >
> > Thanks for your timely reply.
> >
> > Right, we are using two public ip for two remote hosts talking to each
> other. I am wondering if it is possible to let two host in private network
> talk to each other through their corresponding gateway having public ip ?
>
> If there is IP connectivity then you should be able to establish a tunnel.
>
> > In that way, we need to configure the potables on the GW and do NAT. Do
> you know what port the gre tunnel is using to talking to remote hosts ? And
> it is using UDP  right ?
>
> GRE is not a UDP based protocol. It runs directly over IP.
>



-- 
Best regards,

Tianyi Xing (邢天翼)

PhD Student, Research & Teaching Associate
SNAC:Secure Networking and Computing group
School of Computing, Informatics, and Decision Systems Engineering
Ira A. Fulton School of Engineering,
Arizona State University
Tempe, AZ 85281, USA
Cell: (+1) 480-678-3090
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