ue_start
.ue_start = axe_start,
.ue_start = axge_start,
.ue_start = aue_start,
uether_fn_t *ue_start;
if_setstartfn(ifp, ue_start);
ue_start(ifp);
ue->ue_methods->ue_start(ue);
static void ue_start(if_t);