[ 1907.174611] br0: port 1(dummy0) entered blocking state
[ 1907.174670] br0: port 1(dummy0) entered disabled state
[ 1907.174706] dummy0: entered allmulticast mode
[ 1907.174759] dummy0: entered promiscuous mode
[ 1907.178268] br0: port 1(dummy0) entered blocking state
[ 1907.178329] br0: port 1(dummy0) entered forwarding state
[ 1907.438327] dummy0: left allmulticast mode
[ 1907.438367] dummy0: left promiscuous mode
[ 1907.438424] br0: port 1(dummy0) entered disabled state