[ 1908.171287] br0: port 1(dummy0) entered blocking state
[ 1908.171336] br0: port 1(dummy0) entered disabled state
[ 1908.171371] dummy0: entered allmulticast mode
[ 1908.171420] dummy0: entered promiscuous mode
[ 1908.174842] br0: port 1(dummy0) entered blocking state
[ 1908.174908] br0: port 1(dummy0) entered forwarding state
[ 1908.433468] dummy0: left allmulticast mode
[ 1908.433498] dummy0: left promiscuous mode
[ 1908.433537] br0: port 1(dummy0) entered disabled state