[ 1913.074261][ T9972] br0: port 1(dummy0) entered blocking state
[ 1913.074465][ T9972] br0: port 1(dummy0) entered disabled state
[ 1913.074643][ T9972] dummy0: entered allmulticast mode
[ 1913.075642][ T9972] dummy0: entered promiscuous mode
[ 1913.095268][ T9973] br0: port 1(dummy0) entered blocking state
[ 1913.095673][ T9973] br0: port 1(dummy0) entered forwarding state
[ 1914.917584][   T12] dummy0: left allmulticast mode
[ 1914.917872][   T12] dummy0: left promiscuous mode
[ 1914.918095][   T12] br0: port 1(dummy0) entered disabled state