[ 1708.970987] br0: port 1(dummy0) entered blocking state
[ 1708.971033] br0: port 1(dummy0) entered disabled state
[ 1708.971067] dummy0: entered allmulticast mode
[ 1708.971130] dummy0: entered promiscuous mode
[ 1708.974530] br0: port 1(dummy0) entered blocking state
[ 1708.974598] br0: port 1(dummy0) entered forwarding state
[ 1709.217909] dummy0: left allmulticast mode
[ 1709.217951] dummy0: left promiscuous mode
[ 1709.217986] br0: port 1(dummy0) entered disabled state