[ 1721.276106] br0: port 1(dummy0) entered blocking state
[ 1721.276187] br0: port 1(dummy0) entered disabled state
[ 1721.276254] dummy0: entered allmulticast mode
[ 1721.276338] dummy0: entered promiscuous mode
[ 1721.279078] br0: port 1(dummy0) entered blocking state
[ 1721.279109] br0: port 1(dummy0) entered forwarding state
[ 1721.456553] dummy0: left allmulticast mode
[ 1721.456583] dummy0: left promiscuous mode
[ 1721.456610] br0: port 1(dummy0) entered disabled state