[ 1843.537508] br0: port 1(dummy0) entered blocking state
[ 1843.537588] br0: port 1(dummy0) entered disabled state
[ 1843.537654] dummy0: entered allmulticast mode
[ 1843.537743] dummy0: entered promiscuous mode
[ 1843.541243] br0: port 1(dummy0) entered blocking state
[ 1843.541280] br0: port 1(dummy0) entered forwarding state
[ 1843.811634] dummy0: left allmulticast mode
[ 1843.811708] dummy0: left promiscuous mode
[ 1843.811773] br0: port 1(dummy0) entered disabled state