[ 1899.137052] br0: port 1(dummy0) entered blocking state
[ 1899.137100] br0: port 1(dummy0) entered disabled state
[ 1899.137133] dummy0: entered allmulticast mode
[ 1899.137186] dummy0: entered promiscuous mode
[ 1899.140776] br0: port 1(dummy0) entered blocking state
[ 1899.140807] br0: port 1(dummy0) entered forwarding state
[ 1899.394830] dummy0: left allmulticast mode
[ 1899.394869] dummy0: left promiscuous mode
[ 1899.394957] br0: port 1(dummy0) entered disabled state