[ 1642.208222] br0: port 1(dummy0) entered blocking state
[ 1642.208262] br0: port 1(dummy0) entered disabled state
[ 1642.208293] dummy0: entered allmulticast mode
[ 1642.208345] dummy0: entered promiscuous mode
[ 1642.210899] br0: port 1(dummy0) entered blocking state
[ 1642.210962] br0: port 1(dummy0) entered forwarding state
[ 1642.378562] dummy0: left allmulticast mode
[ 1642.378598] dummy0: left promiscuous mode
[ 1642.378639] br0: port 1(dummy0) entered disabled state