[ 1909.730184][ T4121] br0: port 1(dummy0) entered blocking state
[ 1909.730429][ T4121] br0: port 1(dummy0) entered disabled state
[ 1909.730656][ T4121] dummy0: entered allmulticast mode
[ 1909.731709][ T4121] dummy0: entered promiscuous mode
[ 1909.758598][ T4122] br0: port 1(dummy0) entered blocking state
[ 1909.758857][ T4122] br0: port 1(dummy0) entered forwarding state
[ 1911.503737][   T12] dummy0: left allmulticast mode
[ 1911.504035][   T12] dummy0: left promiscuous mode
[ 1911.504246][   T12] br0: port 1(dummy0) entered disabled state