[ 1898.347355] br0: port 1(dummy0) entered blocking state
[ 1898.347433] br0: port 1(dummy0) entered disabled state
[ 1898.347501] dummy0: entered allmulticast mode
[ 1898.347588] dummy0: entered promiscuous mode
[ 1898.351109] br0: port 1(dummy0) entered blocking state
[ 1898.351147] br0: port 1(dummy0) entered forwarding state
[ 1898.605839] dummy0: left allmulticast mode
[ 1898.605885] dummy0: left promiscuous mode
[ 1898.605915] br0: port 1(dummy0) entered disabled state