[ 1922.180095] br0: port 1(dummy0) entered blocking state
[ 1922.180139] br0: port 1(dummy0) entered disabled state
[ 1922.180176] dummy0: entered allmulticast mode
[ 1922.180230] dummy0: entered promiscuous mode
[ 1922.183848] br0: port 1(dummy0) entered blocking state
[ 1922.183916] br0: port 1(dummy0) entered forwarding state
[ 1922.453749] dummy0: left allmulticast mode
[ 1922.453822] dummy0: left promiscuous mode
[ 1922.453885] br0: port 1(dummy0) entered disabled state