[libvirt] How to disconnect a NIC

[Hendrik Schwartke]

Hi,

some time ago I wrote I patch to change the source bridge of a running 
domain. Now I'm wondering what's the best way to disconnect a NIC.
My first thought was to set virDomainNetDef.data.bridge.brname to NULL. 
There are quite some places in the code that had to be modified to 
support this, but that should be doable.
Another idea is to create a new interface type 'disconnected'. The 
purpose of this type would be specifying NICs (whose link state is 
either up or down) without any network connectivity. The type of this 
interface had to be changeable while the domain is running.

Any thoughts would greatly appreciated.

Hendrik Schwartke