[ 2171.869462][ T9555] br0: port 1(dummy0) entered blocking state
[ 2171.869656][ T9555] br0: port 1(dummy0) entered disabled state
[ 2171.869826][ T9555] dummy0: entered allmulticast mode
[ 2171.871353][ T9555] dummy0: entered promiscuous mode
[ 2171.898187][ T9556] br0: port 1(dummy0) entered blocking state
[ 2171.898473][ T9556] br0: port 1(dummy0) entered forwarding state
[ 2174.386808][   T12] dummy0: left allmulticast mode
[ 2174.387664][   T12] dummy0: left promiscuous mode
[ 2174.387909][   T12] br0: port 1(dummy0) entered disabled state