[ 1637.918770] br0: port 1(dummy0) entered blocking state
[ 1637.918849] br0: port 1(dummy0) entered disabled state
[ 1637.918917] dummy0: entered allmulticast mode
[ 1637.919005] dummy0: entered promiscuous mode
[ 1637.921976] br0: port 1(dummy0) entered blocking state
[ 1637.922013] br0: port 1(dummy0) entered forwarding state
[ 1638.112262] dummy0: left allmulticast mode
[ 1638.112301] dummy0: left promiscuous mode
[ 1638.112390] br0: port 1(dummy0) entered disabled state