[ 2237.142273][T30680] br0: port 1(dummy0) entered blocking state
[ 2237.143168][T30680] br0: port 1(dummy0) entered disabled state
[ 2237.143573][T30680] dummy0: entered allmulticast mode
[ 2237.145328][T30680] dummy0: entered promiscuous mode
[ 2237.177624][T30681] br0: port 1(dummy0) entered blocking state
[ 2237.177926][T30681] br0: port 1(dummy0) entered forwarding state
[ 2239.465275][   T12] dummy0: left allmulticast mode
[ 2239.465814][   T12] dummy0: left promiscuous mode
[ 2239.466029][   T12] br0: port 1(dummy0) entered disabled state