[libvirt] Routing

Hi, I'm trying to set up routed networking using libvirt0.4.2, but not having much joy, I cannot ping from either the host OS, or elsewhere on the network (or inverse from the guest OS). I would really appreciate some assistance as I haven't been able to find many routing examples. I'm using the example provided[0], which does create virbr1. If I can provide any further information, please let me know. $ ifconfig = http://pastebin.com/f69bf71bf $ route = http://pastebin.com/f69c73b03 $ cat /etc/libvirt/qemu/networks/default.xml = http://pastebin.com/f3fee05fb $ cat /etc/libvirt/qemu/ubuntu.xml = http://pastebin.com/f477c53a6 [0] http://libvirt.org/formatnetwork.html#examplesRoute Kind Regards, Dave Walker