My understanding is that this relates to non-libvirt-maintained bridges, so marking wontfix for libvirt.
If we wanted a generic way to address this, perhaps /etc/init/qemu- kvm.conf, if it is modprobing vhost_net, should add the iptables rule if not already present? ** No longer affects: libvirt (Ubuntu Quantal) ** Changed in: libvirt (Ubuntu) Status: Triaged => Won't Fix -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to nova in Ubuntu. https://bugs.launchpad.net/bugs/1029430 Title: KVM guests networking issues with no virbr0 and with vhost_net kernel modules loaded To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-archive/+bug/1029430/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs