[ 1905.231307] br0: port 1(dummy0) entered blocking state
[ 1905.231355] br0: port 1(dummy0) entered disabled state
[ 1905.231396] dummy0: entered allmulticast mode
[ 1905.231446] dummy0: entered promiscuous mode
[ 1905.235147] br0: port 1(dummy0) entered blocking state
[ 1905.235209] br0: port 1(dummy0) entered forwarding state
[ 1905.500681] dummy0: left allmulticast mode
[ 1905.500711] dummy0: left promiscuous mode
[ 1905.500738] br0: port 1(dummy0) entered disabled state