[ 1748.268636] br0: port 1(dummy0) entered blocking state
[ 1748.268688] br0: port 1(dummy0) entered disabled state
[ 1748.268723] dummy0: entered allmulticast mode
[ 1748.268776] dummy0: entered promiscuous mode
[ 1748.271172] br0: port 1(dummy0) entered blocking state
[ 1748.271210] br0: port 1(dummy0) entered forwarding state
[ 1748.447337] dummy0: left allmulticast mode
[ 1748.447407] dummy0: left promiscuous mode
[ 1748.447444] br0: port 1(dummy0) entered disabled state