[ 1925.681284][ T3404] br0: port 1(dummy0) entered blocking state
[ 1925.681486][ T3404] br0: port 1(dummy0) entered disabled state
[ 1925.681653][ T3404] dummy0: entered allmulticast mode
[ 1925.682527][ T3404] dummy0: entered promiscuous mode
[ 1925.711040][ T3405] br0: port 1(dummy0) entered blocking state
[ 1925.711261][ T3405] br0: port 1(dummy0) entered forwarding state
[ 1927.980436][   T12] dummy0: left allmulticast mode
[ 1927.980628][   T12] dummy0: left promiscuous mode
[ 1927.980903][   T12] br0: port 1(dummy0) entered disabled state