[Bug 997978] Re: KVM images lose connectivity with bridged network

[Georg Leciejewski]

I have the same symptoms with Ubuntu 12. The network is not reachable 3-4 times a day, for about 1-2 minutes but recovers by itself. Does not seem traffic/load related as it also happens, when there is nothing on.
 
- No dhcp
- bridged network with static ip's for guests
- atm only running one VM Ubuntu 12
- pretty bare host install with just kvm and libvirt 
- no relevant output in any log files

Network

---------------------------------------
interfaces file on host:

auto lo
iface lo inet loopback

# device: eth0
auto  eth0
iface eth0 inet static
  address   176.9.x.x
  broadcast 176.9.x.x
  netmask   255.255.255.192
  gateway   176.9.x.x

# default route to access subnet
up route add -net 176.9.x.x netmask 255.255.255.192 gw 176.9.x.x eth0

auto  br0
iface br0 inet static
  address   176.9.x.x
  netmask   255.255.255.255
  gateway   176.9.x.x
  pointopoint 176.9.x.x
  bridge_ports eth0
  bridge_stp off
  bridge_fd 0
  bridge_maxwait 0
  up route add -host 176.9.x.x dev br0
  up route add -host 176.9.x.x dev br0ll

------------------------------------
interfaces in vm

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
  address 176.9.x.x
  netmask 255.255.255.192
  gateway 176.9.x.x
  pointopoint 176.9.x.x
  dns-nameservers 213.133.98.98. 213.133.99.99

--------------------------------
virsh # version
Compiled against library: libvir 0.9.8
Using library: libvir 0.9.8
Using API: QEMU 0.9.8
Running hypervisor: QEMU 1.0.0

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https://bugs.launchpad.net/bugs/997978

Title:
  KVM images lose connectivity with bridged network

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