[ 1640.988086] br0: port 1(dummy0) entered blocking state
[ 1640.988162] br0: port 1(dummy0) entered disabled state
[ 1640.988232] dummy0: entered allmulticast mode
[ 1640.988320] dummy0: entered promiscuous mode
[ 1640.991223] br0: port 1(dummy0) entered blocking state
[ 1640.991255] br0: port 1(dummy0) entered forwarding state
[ 1641.178915] dummy0: left allmulticast mode
[ 1641.178949] dummy0: left promiscuous mode
[ 1641.178980] br0: port 1(dummy0) entered disabled state