网桥:
<interface type = 'bridge'>
<source bridge = 'br0'/>
</interface>
默认的nat:(virbr0)
<interface type = 'network'>
<source network = 'default'/>
</interface>
网桥:
<interface type = 'bridge'>
<source bridge = 'br0'/>
</interface>
默认的nat:(virbr0)
<interface type = 'network'>
<source network = 'default'/>
</interface>