[ 1906.046429][ T9684] br0: port 1(dummy0) entered blocking state
[ 1906.046873][ T9684] br0: port 1(dummy0) entered disabled state
[ 1906.047049][ T9684] dummy0: entered allmulticast mode
[ 1906.047939][ T9684] dummy0: entered promiscuous mode
[ 1906.076761][ T9685] br0: port 1(dummy0) entered blocking state
[ 1906.077286][ T9685] br0: port 1(dummy0) entered forwarding state
[ 1907.953922][   T12] dummy0: left allmulticast mode
[ 1907.954085][   T12] dummy0: left promiscuous mode
[ 1907.954299][   T12] br0: port 1(dummy0) entered disabled state