ip_ar_dlpi_comm
ip_ar_dlpi_comm(DL_ATTACH_REQ, sizeof (dl_attach_req_t));
bind_mp = ip_ar_dlpi_comm(DL_BIND_REQ, sizeof (dl_bind_req_t));
unbind_mp = ip_ar_dlpi_comm(DL_UNBIND_REQ, sizeof (dl_unbind_req_t));