[ 1579.669546] br0: port 1(dummy0) entered blocking state
[ 1579.669595] br0: port 1(dummy0) entered disabled state
[ 1579.669632] dummy0: entered allmulticast mode
[ 1579.669679] dummy0: entered promiscuous mode
[ 1579.672495] br0: port 1(dummy0) entered blocking state
[ 1579.672557] br0: port 1(dummy0) entered forwarding state
[ 1579.857842] dummy0: left allmulticast mode
[ 1579.857874] dummy0: left promiscuous mode
[ 1579.857897] br0: port 1(dummy0) entered disabled state