ifr_metric
ifr.ifr_metric = mtu;
dbglog("got MTU %d from interface", ifr.ifr_metric);
if (ifr.ifr_metric != 0 &&
lcp_allowoptions[unit].mru > ifr.ifr_metric))
lcp_allowoptions[unit].mru = ifr.ifr_metric;
mtu = ifr->ifr_metric;
ifr->ifr_metric = ipif->ipif_ill->ill_mtu;
ipif->ipif_ill->ill_metric = ifr->ifr_metric;
ifr->ifr_metric = ipif->ipif_ill->ill_metric;