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[libvirt-users] Restarting network on host completely cuts off guests. Why? How to prevent?



Hi list, 

this probably isn't a completely libvirt-specific question but I'll try 
anyway. Please ignore if it is too much off-topic.

On an Ubuntu (9.10) virtualisation host, running KVM and libvirt and 
several guests (Debian, Ubuntu, Windows Server 2003) in a bridged 
network fashion [1,2] I noticed that performing

/etc/init.d/networking restart

on the host completely cuts off all guests from the network. I have to 
manually shutdown and restart (virsh shutdown GUEST && virsh start 
GUEST, a mere reboot doesn't suffice) them to get them onto the network 
again. Obviously that's not ideal.

Is this the expected behaviour? Can I somehow re-establish guest network 
connectivity without shutting down the guest first? Is my setup somehow 
wrong or do I expect too much?

Any insight, explanation or pointers would be much appreciated!

Thanks, 

Andreas

[1] http://wiki.libvirt.org/page/Networking#Debian.2FUbuntu_Bridging
[2] http://wiki.libvirt.org/page/Networking#Guest_configuration_2
-- 
Andreas Ntaflos 

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