[Qemu-discuss] Guest fails to reconnect after host network goes down

[Davide Baldini]

When I unplug the ethernet cable from the physical host, guest fails to 
reconnect; host does reconnect.

A very simple configuration here, with an almost default Debian 7 on 
both host and guest:

-- ON HOST:

/etc/network/interfaces

  auto lo
  iface lo inet loopback

  auto br0
  iface br0 inet dhcp
      bridge_ports    eth1
      bridge_stp      off
      bridge_maxwait  0
      bridge_fd       0


-- ON GUEST:

/etc/network/interfaces

  auto eth0
  allow-hotplug eth0
  iface eth0 inet static
      address 192.168.1.109
      netmask 255.255.255.0
      network 192.168.1.0
      broadcast 192.168.1.255
      gateway 192.168.1.1
      dns-nameservers 192.168.1.1


QEMU is started as:

/usr/local/bin/qemu-system-x86_64 -hda /media/raid1/qemu-109 -m 8G -smp 
4 -enable-kvm -netdev bridge,id=br109 -device 
virtio-net-pci,netdev=br109,id=nic0,mac=00:00:00:00:01:09 -k it -daemonize

QEMU emulator version 2.3.0

Nothing appears on dmesg. Any hints?

-- Davide