[ 1748.678791] br0: port 1(dummy0) entered blocking state
[ 1748.678873] br0: port 1(dummy0) entered disabled state
[ 1748.678940] dummy0: entered allmulticast mode
[ 1748.679028] dummy0: entered promiscuous mode
[ 1748.682055] br0: port 1(dummy0) entered blocking state
[ 1748.682087] br0: port 1(dummy0) entered forwarding state
[ 1748.893278] dummy0: left allmulticast mode
[ 1748.893315] dummy0: left promiscuous mode
[ 1748.893347] br0: port 1(dummy0) entered disabled state