[libvirt-users] public IP for VM

Tony Brian Albers tba at kb.dk
Thu Dec 7 07:52:31 UTC 2017

On 12/07/2017 05:57 AM, scar wrote:
> I can't seem to figure out how to setup a public IP for the VM so we 
> could use it as a second public webserver.  The host machine runs our 
> primary webserver with CentOS 6.9 and one public ipv4 address configured 
> on physical interface eth0.  Now i have configured a new bridge 
> interface br0:
> DEVICE=br0
> TYPE=Bridge
> BOOTPROTO=static
> The IP settings are for a second public ipv4 address in the same 
> network.  Now i setup the VM to use br0 for the NIC and set the same IP 
> settings inside the VM... but it doesn't work.  The VM can't resolve any 
> hosts, and if i try to ssh to the second public IP, it just sends me to 
> the host machine instead of the VM.

Try using macvtap instead. A bridge is more like an internal 
software-based switch, it's not really a NIC.


Tony Albers
Systems administrator, IT-development
Royal Danish Library, Victor Albecks Vej 1, 8000 Aarhus C, Denmark.
Tel: +45 2566 2383 / +45 8946 2316

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