CentOS virt - May 2011 - Discover what vnet is attached to a kvm guest

Hi all,

  How can I see what vnet is attached to a certain kvm guest?? For 
example: I have a kvmguest1. When I launch this guest with virsh 
command, virsh creates a new vnetX interface for this guest. How can I 
extract this virtual net interface (vnet0, vnet1, vnet2 or so on) using 
a script??

Thanks.
-- 
CL Martinez
carlopmart {at} gmail {d0t} com

On 5/13/11, carlopmart <carlopmart at gmail.com>
wrote:
> Hi all,
>
>   How can I see what vnet is attached to a certain kvm guest?? For
> example: I have a kvmguest1. When I launch this guest with virsh
> command, virsh creates a new vnetX interface for this guest. How can I
> extract this virtual net interface (vnet0, vnet1, vnet2 or so on) using
> a script??
If I'm not mistaken, this is automatically assigned. However, you
could define this in the domain XML using the target tag within the
interface container, e.g. using the libvirt example

<interface type='network'>
      <source network='default'/>
      <target dev='vnet7'/>
      <mac address="00:11:22:33:44:55"/>
    </interface>
>From there, I suppose you could extract the information from the
relevant xml with your script.

On 05/13/2011 04:13 AM, carlopmart wrote:
> Hi all,
>
>    How can I see what vnet is attached to a certain kvm guest?? For
> example: I have a kvmguest1. When I launch this guest with virsh
> command, virsh creates a new vnetX interface for this guest. How can I
> extract this virtual net interface (vnet0, vnet1, vnet2 or so on) using
> a script??
The information is available in the output of 'virsh dumpxml
<domain>'.

-- 
Benjamin Franz