[ 1837.771862] br0: port 1(dummy0) entered blocking state
[ 1837.771899] br0: port 1(dummy0) entered disabled state
[ 1837.771931] dummy0: entered allmulticast mode
[ 1837.771985] dummy0: entered promiscuous mode
[ 1837.775441] br0: port 1(dummy0) entered blocking state
[ 1837.775502] br0: port 1(dummy0) entered forwarding state
[ 1838.039588] dummy0: left allmulticast mode
[ 1838.039635] dummy0: left promiscuous mode
[ 1838.039670] br0: port 1(dummy0) entered disabled state