[ 1802.752059] br0: port 1(dummy0) entered blocking state
[ 1802.752103] br0: port 1(dummy0) entered disabled state
[ 1802.752137] dummy0: entered allmulticast mode
[ 1802.752188] dummy0: entered promiscuous mode
[ 1802.755804] br0: port 1(dummy0) entered blocking state
[ 1802.755865] br0: port 1(dummy0) entered forwarding state
[ 1803.015666] dummy0: left allmulticast mode
[ 1803.015756] dummy0: left promiscuous mode
[ 1803.015832] br0: port 1(dummy0) entered disabled state