[ 1681.700030] br0: port 1(dummy0) entered blocking state
[ 1681.700075] br0: port 1(dummy0) entered disabled state
[ 1681.700111] dummy0: entered allmulticast mode
[ 1681.700159] dummy0: entered promiscuous mode
[ 1681.703067] br0: port 1(dummy0) entered blocking state
[ 1681.703134] br0: port 1(dummy0) entered forwarding state
[ 1681.902946] dummy0: left allmulticast mode
[ 1681.902978] dummy0: left promiscuous mode
[ 1681.903006] br0: port 1(dummy0) entered disabled state