[ 1820.835220] br0: port 1(dummy0) entered blocking state
[ 1820.835270] br0: port 1(dummy0) entered disabled state
[ 1820.835307] dummy0: entered allmulticast mode
[ 1820.835362] dummy0: entered promiscuous mode
[ 1820.839173] br0: port 1(dummy0) entered blocking state
[ 1820.839244] br0: port 1(dummy0) entered forwarding state
[ 1821.094123] dummy0: left allmulticast mode
[ 1821.094202] dummy0: left promiscuous mode
[ 1821.094289] br0: port 1(dummy0) entered disabled state