[ 1740.662097] br0: port 1(dummy0) entered blocking state
[ 1740.662147] br0: port 1(dummy0) entered disabled state
[ 1740.662179] dummy0: entered allmulticast mode
[ 1740.662232] dummy0: entered promiscuous mode
[ 1740.665843] br0: port 1(dummy0) entered blocking state
[ 1740.665877] br0: port 1(dummy0) entered forwarding state
[ 1740.927440] dummy0: left allmulticast mode
[ 1740.927482] dummy0: left promiscuous mode
[ 1740.927516] br0: port 1(dummy0) entered disabled state