[ 1899.192550] br0: port 1(dummy0) entered blocking state
[ 1899.192592] br0: port 1(dummy0) entered disabled state
[ 1899.192630] dummy0: entered allmulticast mode
[ 1899.192678] dummy0: entered promiscuous mode
[ 1899.196126] br0: port 1(dummy0) entered blocking state
[ 1899.196159] br0: port 1(dummy0) entered forwarding state
[ 1899.438399] dummy0: left allmulticast mode
[ 1899.438438] dummy0: left promiscuous mode
[ 1899.438470] br0: port 1(dummy0) entered disabled state