ipif_ndp_up
if ((err = ipif_ndp_up(ipif, B_TRUE)) == 0)
err = ipif_ndp_up(ipif, B_TRUE);
VERIFY(ipif_ndp_up(ipif, B_TRUE) != EINPROGRESS);
err = ipif_ndp_up(ipif, act == Res_act_initial);
extern int ipif_ndp_up(ipif_t *, boolean_t);