[ 1636.103626] br0: port 1(dummy0) entered blocking state
[ 1636.103664] br0: port 1(dummy0) entered disabled state
[ 1636.103697] dummy0: entered allmulticast mode
[ 1636.103747] dummy0: entered promiscuous mode
[ 1636.106550] br0: port 1(dummy0) entered blocking state
[ 1636.106619] br0: port 1(dummy0) entered forwarding state
[ 1636.300508] dummy0: left allmulticast mode
[ 1636.300542] dummy0: left promiscuous mode
[ 1636.300593] br0: port 1(dummy0) entered disabled state