last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
ASSERT (rt->buffers_n >= (buf_cnt - dropped_cnt));
rt->buffers_n -= buf_cnt - dropped_cnt;
last_b->flags &= ~VLIB_BUFFER_NEXT_PRESENT;
ASSERT (rt->buffers_n >= (buf_cnt - dropped_cnt));
rt->buffers_n -= buf_cnt - dropped_cnt;