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

[Georg Leciejewski]

@serge, thanks for your input. here Dom0 ifconfig, with 2 machines
running.

i setup br0 myself because the machines are running at hetzner, with
special addon IP's so the vm's can be reached from the outside.
(wiki.hetzner.de/index.php/KVM_mit_Nutzung_aller_IPs_-_the_easy_way) i
am also evaluating the problem with hetzner support to ensure its not
one of their routers in from of the Dom0.

vnet0, vnet1 are the bridges created by libvirt, but the vm have static
ip entries in /network/interfaces and are bound to br0 via libvirt.

------------------------------

br0       Link encap:Ethernet  HWaddr c8:60:00:e9:4a:2e  
          inet addr:176.9.126.xx  Bcast:0.0.0.0  Mask:255.255.255.255
          inet6 addr: fe80::ca60:ff:fee9:4a2e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5852477 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4403013 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2310013511 (2.3 GB)  TX bytes:2588138678 (2.5 GB)

eth0      Link encap:Ethernet  HWaddr c8:60:00:e9:4a:2e  
          inet addr:176.9.126.xx  Bcast:176.9.126.95  Mask:255.255.255.192
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:6623242 errors:0 dropped:35190 overruns:0 frame:0
          TX packets:4668377 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2484375973 (2.4 GB)  TX bytes:1715146205 (1.7 GB)
          Interrupt:17 Memory:fe500000-fe520000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:59917 errors:0 dropped:0 overruns:0 frame:0
          TX packets:59917 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:9106822 (9.1 MB)  TX bytes:9106822 (9.1 MB)

vnet0     Link encap:Ethernet  HWaddr fe:54:00:2e:3d:0e  
          inet6 addr: fe80::fc54:ff:fe2e:3d0e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2033457 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2971987 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500 
          RX bytes:1023321831 (1.0 GB)  TX bytes:1482597549 (1.4 GB)

vnet1     Link encap:Ethernet  HWaddr fe:54:00:3f:2a:9c  
          inet6 addr: fe80::fc54:ff:fe3f:2a9c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:124034 errors:0 dropped:0 overruns:0 frame:0
          TX packets:140178 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500 
          RX bytes:27970351 (27.9 MB)  TX bytes:56681695 (56.6 MB)
------------------------------------

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

Title:
  KVM images lose connectivity with bridged network

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