[ 1979.993860] br0: port 1(dummy0) entered blocking state
[ 1979.993894] br0: port 1(dummy0) entered disabled state
[ 1979.993913] dummy0: entered allmulticast mode
[ 1979.993952] dummy0: entered promiscuous mode
[ 1979.997235] br0: port 1(dummy0) entered blocking state
[ 1979.997256] br0: port 1(dummy0) entered forwarding state
[ 1980.220174] dummy0: left allmulticast mode
[ 1980.220199] dummy0: left promiscuous mode
[ 1980.220234] br0: port 1(dummy0) entered disabled state