[ 1801.258300] br0: port 1(dummy0) entered blocking state
[ 1801.258380] br0: port 1(dummy0) entered disabled state
[ 1801.258447] dummy0: entered allmulticast mode
[ 1801.258530] dummy0: entered promiscuous mode
[ 1801.262013] br0: port 1(dummy0) entered blocking state
[ 1801.262045] br0: port 1(dummy0) entered forwarding state
[ 1801.518885] dummy0: left allmulticast mode
[ 1801.518925] dummy0: left promiscuous mode
[ 1801.518952] br0: port 1(dummy0) entered disabled state