V6_IPIF_LINKLOCAL
(!ipif->ipif_isv6 || !V6_IPIF_LINKLOCAL(ipif))) {
if (isv6 && V6_IPIF_LINKLOCAL(old_ipif)) {
V6_IPIF_LINKLOCAL(new_ipif)) {
(isv6 && V6_IPIF_LINKLOCAL(new_ipif)) ||