f = vnet_get_frame_to_sw_interface (vnm, sw_if_index);
f->n_vectors = ptd->per_port_queue[p].n_buffers;
to_next = vlib_frame_vector_args (f);
f = vnet_get_frame_to_sw_interface (vnm, sw_if_index);
f->n_vectors = ptd->per_port_queue[p].n_buffers;
to_next = vlib_frame_vector_args (f);