[ 1751.172396] br0: port 1(dummy0) entered blocking state
[ 1751.172473] br0: port 1(dummy0) entered disabled state
[ 1751.172540] dummy0: entered allmulticast mode
[ 1751.172638] dummy0: entered promiscuous mode
[ 1751.176635] br0: port 1(dummy0) entered blocking state
[ 1751.176670] br0: port 1(dummy0) entered forwarding state
[ 1751.439304] dummy0: left allmulticast mode
[ 1751.439339] dummy0: left promiscuous mode
[ 1751.439369] br0: port 1(dummy0) entered disabled state