[libvirt-users] assign static external IP to container

scar scar at drigon.com
Sat Dec 14 02:51:11 UTC 2013


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Gao feng @ 12/12/2013 10:18 PM:
> I saw there are two bridge br0 and virbr0 in your host. which
> bridge the libvirt uses?  what's result of #virsh net-list ?

well i don't quite understand bridges and their function, i'm kinda
just following directions.  br0 replaced eth0 though in my interfaces
file according to this guide[1] i followed to setup the bridge.  i'm
pretty sure virbr0 is what libvirt uses....

host$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

auto br0
iface br0 inet static
	address 67.180.246.122
	netmask 255.255.255.248
	gateway 67.180.246.121
	dns-nameservers 67.180.241.11 67.180.241.12
	bridge_ports eth0
	bridge_fd 9
	bridge_maxage 12
	bridge_stp off

host$ virsh net-list
Name                 State      Autostart
- -----------------------------------------
default              active     yes

host$ virsh net-dumpxml default
<network>
  <name>default</name>
  <uuid>e6d3f97a-5870-8ee7-1d82-64b3434f138b</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0' />
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254' />
    </dhcp>
  </ip>
</network>

$


1.
https://help.ubuntu.com/12.04/serverguide/network-configuration.html#bridging
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