Linux KVM: disable/enable virbr0 NAT Interface

CentOS에서 virbr0는 guest OS가 NAT으로 사용한다.

virbr0 - disable

virsh # net-list
virsh # net-destroy default
# /etc/init.d/libvirtd restart

virbr0 - enable

virsh # net-list –all
virsh # net-define /usr/share/libvirt/networks/default.xml
virsh # net-autostart default
virsh # net-start default

virsh # start ubuntu

error: Failed to start domain ubuntu
error: Network not found: no network with matching name ‘default’

path : /etc/libvirt/qemu/ubuntu.xml

변경 전
<interface type=’network‘>
       <mac address=’54:52:00:5e:53:d2′/>
       <source network=’default‘/>
</interface>

변경 후
<interface type=’bridge‘>
       <mac address=’54:52:00:5e:53:d2′/>
       <source bridge=’br0′/>
</interface>