이슈 : What is the virbr0 interface used for ...

What is the virbr0 interface used for .... 

sudo brctl delbr virbr0
sudo cp /var/lib/libvirt/network/default.xml /tmp/default.xml
sudo vi /tmp/default.xml  #edit the ip address
sudo virsh net-destroy default
sudo virsh net-define /tmp/default.xml
sudo virsh net-start default
virsh net-destroy default
virsh net-undefine default

service libvirtd restart