Ubuntu 12.04 / kvm / libvirt / problem with network bridge br0

Michael Zoet Michael.Zoet at zoet.de
Fri May 18 09:52:08 UTC 2012


Am 18.05.2012 10:57, schrieb Thorsten Göllner:
> Sorry, my fault. I had a typo. The broadcst is configured correctly:
> Any other idea?

yes but may be it is another typo:

>>     ON THE GUEST:
>>     =============
>>     ~$ ifconfig
>>     eth0      Link encap:Ethernet   HWaddr 52:54:00:d2:d1:73
>>               inet addr:  Bcast:  
>>     Mask:
>>     [...]
>>     ~$ route -n
>>     Kernel IP routing table
>>     Destination     Gateway         Genmask         Flags Metric
>>     Ref    Use Iface
>>         UG    100   
>>     0        0 eth0
>>     1213.203.209.160 U     0     
>>     0        0 eth0

An IP of 1213.203.209.160 in your default route does not exist in IPv4
;-). The 1213 is much too high ;-) and I think the 2 should be deleted.
But I also think your routing is not correct. In my opinion there should
be IP of your KVM host) instead of
and instead  of 1213.203.209.16.
But these are only guesses and it depends on how routing is done in your
data center. (I think you are using Hetzner and Hetzner does not allow
you to use their gateway with other MAC addresses than your KVM host!) 
Maybe it is a typo but may be not because you used the command "route -n".

If you realy want some help you should post config files! It is easier
to track problems. 

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