I think I may have the same problem running a 13.10 qemu-kvm host with 8 virtual machines. As far as I can see only two VMs seem to have the problem. All of them use em1: macvtap as source device and a bridge as source mode. After reading many posts here, I changed from virtio to rtl8139 as a device model to see if I still lose network connection.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/997978 Title: KVM images lose connectivity with bridged network To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/997978/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs