[ 1838.798695] br0: port 1(dummy0) entered blocking state
[ 1838.798743] br0: port 1(dummy0) entered disabled state
[ 1838.798769] dummy0: entered allmulticast mode
[ 1838.798821] dummy0: entered promiscuous mode
[ 1838.802668] br0: port 1(dummy0) entered blocking state
[ 1838.802728] br0: port 1(dummy0) entered forwarding state
[ 1839.098430] dummy0: left allmulticast mode
[ 1839.098496] dummy0: left promiscuous mode
[ 1839.098607] br0: port 1(dummy0) entered disabled state