[libvirt-users] Missing target dev for interface

[jeremy avnet]

I have over 20 guests running on a particular host and the three
longest running ones are missing the network device information in
their XML description:

    <interface type='network'>
      <mac address='54:52:10::f2:c5'/>
      <source network='local'/>
    </interface>

Compared to the others which have:

    <interface type='network'>
      <mac address='54:52:d1:32:0a:a1'/>
      <source network='local'/>
      <target dev='vnet13'/>
    </interface>

This is problematic as I wanted to use domifstat on the domains. Using
the packet counts shown via ifconfig on the host, I was able to
determine what the vnet interface should be, but passing that to
domifstat doesn't work:

$ virsh domifstat maki221 vnet13
Connecting to uri: qemu:///system
error: Failed to get interface stats guest19 vnet13
error: invalid argument in invalid path, 'vnet13' is not a known interface

How did this happen? Is there a way I can get libvirt to know about
the interfaces?

And the guest OS's network connections work fine.

Thanks!
.:. jeremy