RE: [Xen-users] Multiple bridges on same subnet?

[Steve Arntzen <steve@xxxxxxxxxx>]

Yes, you are correct and I may do that on some of the internal servers.

The downside is, on some of the public servers, they could see each
other's network traffic if using the same bridge.  I want to avoid that
if possible.

Thanks for the reply,

Steve.


 
On Mon, 2010-04-19 at 14:54 +0200, Matej Zary wrote:
> And what about creating bond on the eth1 and eth2? You will also gain 
> redundancy in network connection this way.
> 
> Regards
> 
> Matej
> 
> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Steve Arntzen
> Sent: Monday, April 19, 2010 2:33 PM
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] Multiple bridges on same subnet?
> 
> I am running multiple DomUs on the same subnet and wanted to spread the
> load over multiple network interfaces.  In addition, the system has
> other DomUs with interfaces (bridges) on other subnets.  The NICs and
> bridges do not have any IPs on the Dom0, only in the DomUs.
> 
> If I run two DomUs with separate bridges (server1 - br1/eth1 and server2
> - br2/eth2) on the same subnet, everything runs fine for a while (up to
> 24 hours) and suddenly, all bridge traffic stops.  Even bridge traffic
> on other DomUs on separate networks stops.  Nothing is logged by the
> Dom0 or any of the DomUs.  All interface configurations and routing
> tables look fine.  Shutting down the DomUs, restarting networking and
> restarting the DomUs clears the problem.
> 
> The Dom0 which has its own interface (eth0) always works.
> 
> Should I not be running multiple bridges on the same subnet or am I
> missing some network configuration?
> 
> If I share one bridge with multiple DomUs, all works well even under
> heavy load.  The network however, is a bottleneck.
> 
> Platform:
> Sun x4140, dual hex core AMD64
> Debian 5.0.4  (kernel 2.6.26-2-xen-amd64)
> Xen 3.2-1-amd64
> 
> # The first bridge
>         auto br1
>         iface br1 inet manual
>         bridge_ports eth1
>         bridge_stp off
>         bridge_maxwait 5
> 
> # The second bridge
>         auto br2
>         iface br2 inet manual
>         bridge_ports eth2
>         bridge_stp off
>         bridge_maxwait 5
> 
> First DomU:
> vif = [ 'bridge=br1' ]
> 
> Second DomU:
> vif = [ 'bridge=br2' ]
> 
> 
> Thanks in advance,
> 
> Steve.
> 
> 
> 
> 
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