[ 1637.094321] br0: port 1(dummy0) entered blocking state
[ 1637.094362] br0: port 1(dummy0) entered disabled state
[ 1637.094397] dummy0: entered allmulticast mode
[ 1637.094450] dummy0: entered promiscuous mode
[ 1637.097318] br0: port 1(dummy0) entered blocking state
[ 1637.097382] br0: port 1(dummy0) entered forwarding state
[ 1637.285941] dummy0: left allmulticast mode
[ 1637.286034] dummy0: left promiscuous mode
[ 1637.286098] br0: port 1(dummy0) entered disabled state