[ 1607.050547] br0: port 1(dummy0) entered blocking state
[ 1607.050628] br0: port 1(dummy0) entered disabled state
[ 1607.050706] dummy0: entered allmulticast mode
[ 1607.050793] dummy0: entered promiscuous mode
[ 1607.053729] br0: port 1(dummy0) entered blocking state
[ 1607.053763] br0: port 1(dummy0) entered forwarding state
[ 1607.254144] dummy0: left allmulticast mode
[ 1607.254223] dummy0: left promiscuous mode
[ 1607.254288] br0: port 1(dummy0) entered disabled state