I don't know how i have modified the interface name br0 by br1, but it's do, and my virtual machine ( on KVM) can not to be launch, because virt-manager know br0 and not br1....

How can i change the interface name, i tried :

#ifconfig br1 down
#ifconfig br0 up

But it don't work!!!!

Maybe i could do that inside KVM but where exactly ?