Sascha Frey wrote:
Hi,
I met a problem setting up virt-manager and libvirt:
I want to use an existing customized network bridge with libvirt
(I need special iptables rules and a custom DHCP setup).
So I created a network definition file like this:
<network>
<name>NAT</name>
<bridge name='br-nat' />
</network>
Unfortunately, I'm unable to activate this network, because libvirt
tries to create the bridge `br-nat' and fails, because it already
exists:
# virsh net-start NAT
error: Failed to start network NAT
error: cannot create bridge 'br-nat': File exists
I just want libvirt to attach the guest's tap devices to this existing
bridge. I don't want libvirt to manage the network.
Is there any chance to realize this set-up?
It should work with virt-manager using the graphical wizard.
Yes, just don't define a new network. To use existing bridges, you just need to
edit your guest XML files to use something like:
<interface type='bridge'>
<mac address='00:16:3e:4a:f6:89'/>
<source bridge='br0'/>
</interface>
Note that configured bridges should also show up in virt-manager, I believe.
--
Chris Lalancette