[ 1722.230620] br0: port 1(dummy0) entered blocking state
[ 1722.230702] br0: port 1(dummy0) entered disabled state
[ 1722.230769] dummy0: entered allmulticast mode
[ 1722.230859] dummy0: entered promiscuous mode
[ 1722.233623] br0: port 1(dummy0) entered blocking state
[ 1722.233661] br0: port 1(dummy0) entered forwarding state
[ 1722.421174] dummy0: left allmulticast mode
[ 1722.421212] dummy0: left promiscuous mode
[ 1722.421245] br0: port 1(dummy0) entered disabled state