This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] network-bridge breaks networking when eth0:1 is added

On Tue, Apr 28, 2009 at 6:31 PM, Kai Schaetzl <maillists@xxxxxxxxxxxxx> wrote:
> Fajar A. Nugraha wrote on Tue, 28 Apr 2009 04:55:55 +0700:
>> No, that won't work.
> It works fine with my original setup and on my other machine. I think even
> without forwarding switched on. That's why I think it works via
> broadcasting.

It shouldn't work. Unless of course I misunderstood your explanantion.
Please post the output of these commands on the working dom0, the
non-working dom0, and on domU :
- brctl show
- ip addr list | grep "inet "

plus the ip address of the third machine (the one that's connected to
dom0's eth1).

> Are you famliar with the difference between
>> bridge and route?
>> I believe you have two alternatives :
>> (1) Setup multiple bridges
>> For example, br0 for eth0 and br1 for eth1. Then you assign two NICs
>> to domU, each NIC on different bridge.
> That's what I did and mentioned in my posting your replied to. That works
> in one direction (dom0 eth1 -> domU), but not from domU eth1 -> dom0. I
> don't need that second variant, but it's somehow "disturbing" that it
> doesn't work.

Are you sure this is what you did? As far as I can tell from your
previous explataion you only have one bridge. Then again I could've
misunderstood your explanation. Either way, the output of commands
above should give enough information.

>> (2) setup static routing on dom0 and domU.
>> This way traffic from domU to thrid machine can go something like this:
>> domU eth0 -> dom0 xenbr0 -> dom0 eth1 -> third machine eth1.
> I thought about that earlier, but it's not clear to me what I should set
> as a gateway then. A static route for the subnet on third machine eth1
> with gateway IP dom0 eth1?

It'd be easier once I know what your setup is like. At this point I'm
at loss as to what your setup is like.



Xen-users mailing list