[ 1607.051729] br0: port 1(dummy0) entered blocking state
[ 1607.051773] br0: port 1(dummy0) entered disabled state
[ 1607.051811] dummy0: entered allmulticast mode
[ 1607.051866] dummy0: entered promiscuous mode
[ 1607.054703] br0: port 1(dummy0) entered blocking state
[ 1607.054770] br0: port 1(dummy0) entered forwarding state
[ 1607.239884] dummy0: left allmulticast mode
[ 1607.239920] dummy0: left promiscuous mode
[ 1607.239949] br0: port 1(dummy0) entered disabled state