[libvirt-users] Some missunderstanding in the wiki page

[Leopold Palomo-Avellaneda]

A Dimecres 30 Juny 2010, Tom Hughes va escriure:
> On 30/06/10 10:35, Leopold Palomo-Avellaneda wrote:
> > The configuration (I have follow only the debian/ubuntu steps) shows that
> > br0 has assigned an IP. I did the mistake to try to assign the same IP in
> > the guest network configuration, I understand that, and obviously it
> > doesn't work (duplicate IPs). So, to me, it would me more clear if the
> > br0 interface has no IP. In my case, I have two nics: eth0 the interface
> > for the host and eth1 for the guest. The eth1 part in my
> > network/interfaces is:
> >
> > ...
> > auto eth1
> > iface eth1 inet manual
> >
> > auto br0
> > iface br0 inet manual
> >          bridge_ports  eth1
> >          bridge_stp    on
> >          bridge_maxwait  0
> >          bridge_fd       0
> > ...
> >
> > and then in the guest you configure the IP as you want. In the host, eth1
> > (or whatever interface you bridge) has no IP, so it's not used, and the
> > guest uses completely.
>
> The common configuration that the wiki is documenting is presumably the
> case where the host has a single ethernet interface that is shared by
> the host and the guests. In that configuration the bridge does have an
> address, which is the address of the host machine.

and then you can assign _another_ IP to the guest or must assign the same?

> Basically a bridge is like a virtual ethernet switch inside your
> machine, where one port is connected to each device that is enslaved to
> it and another port is connected to the kernel's IP stack - that port
> appears as the brN interface and can have an IP address (for the host)
> assigned to it.

but, my main doubts is about to have a sever with several nics and several 
guest. I think that a good approach (if it's possbile) is to have a an 
specific nic for each guest. No?

Regards,

Leo