[ 1907.983323] br0: port 1(dummy0) entered blocking state
[ 1907.983367] br0: port 1(dummy0) entered disabled state
[ 1907.983402] dummy0: entered allmulticast mode
[ 1907.983459] dummy0: entered promiscuous mode
[ 1907.986945] br0: port 1(dummy0) entered blocking state
[ 1907.987005] br0: port 1(dummy0) entered forwarding state
[ 1908.228075] dummy0: left allmulticast mode
[ 1908.228106] dummy0: left promiscuous mode
[ 1908.228136] br0: port 1(dummy0) entered disabled state