[ 1703.378367] br0: port 1(dummy0) entered blocking state
[ 1703.378410] br0: port 1(dummy0) entered disabled state
[ 1703.378442] dummy0: entered allmulticast mode
[ 1703.378488] dummy0: entered promiscuous mode
[ 1703.380877] br0: port 1(dummy0) entered blocking state
[ 1703.380913] br0: port 1(dummy0) entered forwarding state
[ 1703.555156] dummy0: left allmulticast mode
[ 1703.555187] dummy0: left promiscuous mode
[ 1703.555214] br0: port 1(dummy0) entered disabled state