[ 1681.214268] br0: port 1(dummy0) entered blocking state
[ 1681.214307] br0: port 1(dummy0) entered disabled state
[ 1681.214343] dummy0: entered allmulticast mode
[ 1681.214396] dummy0: entered promiscuous mode
[ 1681.217280] br0: port 1(dummy0) entered blocking state
[ 1681.217344] br0: port 1(dummy0) entered forwarding state
[ 1681.400708] dummy0: left allmulticast mode
[ 1681.400754] dummy0: left promiscuous mode
[ 1681.400807] br0: port 1(dummy0) entered disabled state