Add Two Bridged Interfaces on Ubuntu for KVM

Question

I have ran the following;

sudo /usr/sbin/brctl addbr br0
sudo /usr/sbin/brctl  addif br0 eth0

And added the following to /etc/network/interfaces;

auto br0 # for XPProxx86 KVM
iface br0 inet dhcp
  bridge_ports eth0
  bridge_stp off
  bridge_maxwait 0
  bridge_fd 0

This works perfectly; My XP VM can see the LAN and be reached via the LAN on my laptop. I have another VM I want to do the same with; so I am running two fully reachable VMs on my laptop. I have ran;

sudo /usr/sbin/brctl addbr br1

But then I get the following error;

sudo /usr/sbin/brctl  addif br1 eth0
device br1 already exists; can't create bridge with the same name

Is it not possible to have two VMs on my laptop (which only has one NIC) with access to the local network and be individually accessible from other LAN hosts? I don't want the to be NAT'ed.

Answer 1

show us brtctl show

You can have more bridges, but you don`t need one bridge for each VM! my interfaces (with serving 9 VMs):

auto eth0
iface eth0 inet manual

auto br0
iface br0 inet static
        address 192.168.1.4
        netmask 255.255.255.0
        network 192.168.1.0
        broadcast 192.168.1.255
        gateway 192.168.1.1
        # dns-* options are implemented by the resolvconf package, if installed
        dns-nameservers 192.168.1.2
        dns-search dmz.example.com
        bridge_ports eth0
        bridge_fd 0
        bridge_maxwait 0
        bridge_stp off