Dear Peter,

Thanks for your reply. I was so occupied with troubleshooting that I forgot to mention the OS & Xen version :)

My CentOS version is CentOS release 5.7 (Final) Linux 2.6.18-274.7.1.el5xen #1 SMP Thu Oct 20 17:06:34 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux

and Xen v3.0.

I tried creating bridges the same way you did and succedded. I also tried doing the same via ifcfg scripts, and it also worked.

I have no problem with creating bridges and connecting them with physical ifaces, but I can't start my VM's (most of the time one VM start but the other one hangs while trying to initalize eth2 that is connected to my second (non default - xenbr1) bridge)).

The only diference between your config and mine is that I have vifname-s listed (example below):

vif = [ "mac=00:16:36:72:35:e5,bridge=xenbr0,script=vif-bridge,vifname=vif4.0", "mac=00:16:3e:57:de:0d,bridge=xenbr1,script=vif-bridge, vifname=vif4.1" ]

I'm not saying that this could be the problem, but since I'm slowly running out of ideas - it's a longshot :)

So, to sum it all up - I can create bridges properly, but my VM's hang when they try to bring up vifaces connected to the xenbr1. Also, I have no problem with having only one bridge active - problem appears when I have multiple bridges.

Br, Matija