[ 1737.233124] br0: port 1(dummy0) entered blocking state
[ 1737.233162] br0: port 1(dummy0) entered disabled state
[ 1737.233196] dummy0: entered allmulticast mode
[ 1737.233243] dummy0: entered promiscuous mode
[ 1737.236089] br0: port 1(dummy0) entered blocking state
[ 1737.236154] br0: port 1(dummy0) entered forwarding state
[ 1737.437973] dummy0: left allmulticast mode
[ 1737.438015] dummy0: left promiscuous mode
[ 1737.438078] br0: port 1(dummy0) entered disabled state