Hi,
I''m still curious on the bridge part, but I did finally get this
working
by using proxy arp and routing. I needed to force the upstream router
to clear it''s ARP cache and then it worked. Even though I had waited
upwards of 10 minutes when trying it before it appears that wasn''t long
enough.
On Mon, 2005-01-24 at 23:28 -0500, Matt Ayres wrote:> Hi,
>
> I''ve currently run into the situation where Xen in bridged mode
will
> only work for IP''s on the same subnet as domain0. Routed mode
isn''t an
> option as IP''s on the same subnet will be in use by other
> virtual/physical servers. Currently the router is configured to handle
> about a dozen subnet''s and it aliases an IP to it''s
interface for use as
> a default gateway for LAN devices.
>
> If I configure the xenU''s on the same subnet as domain0 things
work fine
> so I am sure the bridge config is correct. To make sure though I did
> make Xend use my bridge setup that works for my User Mode Linux
VM''s.
>
> 1) Using Linux bridging I am able to accomplish what I want using User
> Mode Linux. As far as I can tell UML is not doing anything special, the
> interface options are identical once the interfaces are created. I have
> tried putting the vif interfaces into promiscuous mode.
>
> Why is this possible under UML and not Xen when both use Linux kernel
> bridging?
>
> 2) Does anyone have ideas for possible solutions? I''ve tried
various
> methods of iptables/nat and proxy_arp setups and have been unable to get
> this to work. I know I could do a 1-to-1 mapping of external IP''s
to an
> internal subnet using nat, but that would be very ugly and not something
> I think of as a workable solution. Ideally i''d like to continue
using
> bridging.
>
> --
> Thanks,
> Matt
>
>
>
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