[ 1965.062367][ T8213] br0: port 1(dummy0) entered blocking state
[ 1965.062581][ T8213] br0: port 1(dummy0) entered disabled state
[ 1965.062753][ T8213] dummy0: entered allmulticast mode
[ 1965.063766][ T8213] dummy0: entered promiscuous mode
[ 1965.091539][ T8214] br0: port 1(dummy0) entered blocking state
[ 1965.091815][ T8214] br0: port 1(dummy0) entered forwarding state
[ 1967.043177][   T12] dummy0: left allmulticast mode
[ 1967.043455][   T12] dummy0: left promiscuous mode
[ 1967.043686][   T12] br0: port 1(dummy0) entered disabled state