[ 1905.905456] br0: port 1(dummy0) entered blocking state
[ 1905.905496] br0: port 1(dummy0) entered disabled state
[ 1905.905535] dummy0: entered allmulticast mode
[ 1905.905583] dummy0: entered promiscuous mode
[ 1905.909132] br0: port 1(dummy0) entered blocking state
[ 1905.909161] br0: port 1(dummy0) entered forwarding state
[ 1906.175269] dummy0: left allmulticast mode
[ 1906.175329] dummy0: left promiscuous mode
[ 1906.175400] br0: port 1(dummy0) entered disabled state