--- On Thu, 6/23/11, CP Hennessy <cp.hennessy@xxxxxxxxxx> wrote:
> From: CP Hennessy <cp.hennessy@xxxxxxxxxx>
> Subject: [Xen-users] bridge networking issue from dom0 to the world
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Date: Thursday, June 23, 2011, 12:26 PM
> Hi,
>   I'm trying to setup xen and have figured out most of
> my issues. However I'm 
> stuck with a networking issue.
>
> From my dom0 I can ping the world and my domU. However I
> cannot ping anything 
> except the dom0 from inside my domU.
>
> dom0 is a clean opensuse 11.4 with XEN 4.1.1 added to it
> (using the default 
> kernel 2.6.37.6-0.5-xen).
>
> domU is ubuntu server 8.04 with all recent updates (and
> using the kernel 
> above).
>
> I've manually setup the xen cfg for my domU
> (xen-create-tool was not available 
> on SuSE and I could not seem to get virt-manager to do what
> I wanted - or made 
> sence of it :( ).
>
>
> # cat /etc/sysctl.conf
> net.ipv4.ip_forward=1
> net.ipv4.conf.all.rp_filter=1
> net.ipv4.icmp_echo_ignore_broadcasts=1
Turn on proxy arp in dom0
echo 'net.ipv4.conf.all.proxy_arp = 1' >> /etc/sysctl.conf
Consider using the same gateway in dom0 and domU *.96
Your provider must allocate multiple IP's for your /16
-- 
Mark
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