[ 1750.288594] br0: port 1(dummy0) entered blocking state
[ 1750.288636] br0: port 1(dummy0) entered disabled state
[ 1750.288668] dummy0: entered allmulticast mode
[ 1750.288719] dummy0: entered promiscuous mode
[ 1750.292337] br0: port 1(dummy0) entered blocking state
[ 1750.292398] br0: port 1(dummy0) entered forwarding state
[ 1750.544940] dummy0: left allmulticast mode
[ 1750.544979] dummy0: left promiscuous mode
[ 1750.545035] br0: port 1(dummy0) entered disabled state