I'm using the same setup for multiple bridges for Xen, no problem. But I use static IP addresses. You *have* to use IP numbers from different subnets.

I've setup just the IPADDR= and NETMASK= to have different static IPs in different subnets and changed to the BOOTPROTO=static in each of the ifcfg-brX scripts.

This hasn't fixed my issue. Perhaps it's because of the way I'm trying to use it (or I don't get it). Does each VM that is using a specific bridged device need to have the same IP subnet as that of the static brX address?

What I am trying to accomplish here is this:

Router (192.168.7.1) ---------> eth0/br0 (10.1.10.1) -------------> VM01 (with internal vr0 and vr1 attached to br0 and br1 and a bridged IP of 192.168.7.253, running Untangle in bridge mode)

VM01 --------> eth1/br1 -----------> local switch -------------> eth2/br2 --------------> other running VMs.

Thinking that the internal bridging done by the Untangle VM might have caused an issue... I setup just a stock Win Server 2003 install with a single ethernet device attached to br0 and set a static IP in the 192.168.7.X range (in Win 2k3 VM). The untangle VM is shutdown. I still can't ping 192.168.7.1 from the Win2k3 VM.

Thanks,

Jacob

No. But you have to tell via config (I don't know how KVM does this) which bridge the VM is going to use. And if you want it to be reachable via two bridges you have to set it up for two bridges and give it two IP numbers. And the packet then has to come in thru the correct interface/bridge, there is no "bridging" between the bridges. You would need to set up some additional routing to work around this (probably, I'm not a routing expert).

Is that possibly not the case? e.g. your VMs are still setup to use only one bridge?

Kai

There ended up being 2 things at work against me. 1, stupidity and the other equipment.

There are 5 Ethernet cards installed... eth0 through eth4. I've been using eth2 successfully. When I removed all ifcfg-X scripts and recreated them, the actual ethX devices were added in the opposite order. My eth2 still worked because it was in the middle, but the other 4 had swapped. I never noticed since eth2 was still working... id10t (me that is).

The other issue is that any of the bridged network cards would not communicate with my router. I had to put a switch between them and the router, nothing else. I saw this by accident in that I could only get 1 ethX device to work at a time, and it ended up following the cable attached to a switch, not router. Other routers work... but this one running DD-WRT doesn't, unless there is a switch between it and the bridged device.

So... the config for all but br2 ended up being what I had originally, but no IPs assigned at all. I've also enabled STP and haven't bothered to see if this actually does anything.

So my brX scripts are like this: DEVICE=br0 TYPE=Bridge BOOTPROTO=none ONBOOT=yes DELAY=0 STP=on

The only device that has a static IP is br2, all others are set to none, but each VM works. Even the Untangle setup where it bridges the two assigned VM nics works.

Thanks for all the info and help. Sorry it ended up being stupidity and off hardware (strange that Xen Server worked fine though).

Now to somehow get this indexed off of google as searching for a solution brought me to my silly post :)

Thanks again!

Jacob