[ 1847.616494] br0: port 1(dummy0) entered blocking state
[ 1847.616534] br0: port 1(dummy0) entered disabled state
[ 1847.616566] dummy0: entered allmulticast mode
[ 1847.616614] dummy0: entered promiscuous mode
[ 1847.619888] br0: port 1(dummy0) entered blocking state
[ 1847.619946] br0: port 1(dummy0) entered forwarding state
[ 1847.839454] dummy0: left allmulticast mode
[ 1847.839481] dummy0: left promiscuous mode
[ 1847.839508] br0: port 1(dummy0) entered disabled state