Also, does 'ifdown eth0; ifup eth0' in the guest bring networking back up? I'm wondering whether you have the same problem as bug 997978. Note that that bug was fixed for reporters by using the qemu-kvm in ppa :ubuntu-virt/backports, and we're waiting on feedback on whether the qemu-kvm version in ppa:ubuntu-virt/kvm-network-hang also fixes it.
So it should definately be worth it to test at leaset ppa:ubuntu- virt/backports. ** Changed in: qemu-kvm (Ubuntu) Importance: Undecided => High ** Changed in: qemu-kvm (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu-kvm in Ubuntu. https://bugs.launchpad.net/bugs/1050934 Title: VM stops receiving packets on heavy load from virtio network interface briged to a bonded interface on kvm hypervisor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1050934/+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