[ 1578.109744] br0: port 1(dummy0) entered blocking state
[ 1578.109821] br0: port 1(dummy0) entered disabled state
[ 1578.109892] dummy0: entered allmulticast mode
[ 1578.109984] dummy0: entered promiscuous mode
[ 1578.112902] br0: port 1(dummy0) entered blocking state
[ 1578.112939] br0: port 1(dummy0) entered forwarding state
[ 1578.319476] dummy0: left allmulticast mode
[ 1578.319585] dummy0: left promiscuous mode
[ 1578.319675] br0: port 1(dummy0) entered disabled state