[ 1804.404813] br0: port 1(dummy0) entered blocking state
[ 1804.404879] br0: port 1(dummy0) entered disabled state
[ 1804.404943] dummy0: entered allmulticast mode
[ 1804.405022] dummy0: entered promiscuous mode
[ 1804.407627] br0: port 1(dummy0) entered blocking state
[ 1804.407661] br0: port 1(dummy0) entered forwarding state
[ 1804.587279] dummy0: left allmulticast mode
[ 1804.587312] dummy0: left promiscuous mode
[ 1804.587337] br0: port 1(dummy0) entered disabled state