[ 1870.581152] br0: port 1(dummy0) entered blocking state
[ 1870.581211] br0: port 1(dummy0) entered disabled state
[ 1870.581249] dummy0: entered allmulticast mode
[ 1870.581296] dummy0: entered promiscuous mode
[ 1870.584945] br0: port 1(dummy0) entered blocking state
[ 1870.584980] br0: port 1(dummy0) entered forwarding state
[ 1870.864802] dummy0: left allmulticast mode
[ 1870.864838] dummy0: left promiscuous mode
[ 1870.864868] br0: port 1(dummy0) entered disabled state