-extern struct notifier *ip_up_notifier; /* IPCP has come up */
-extern struct notifier *ip_down_notifier; /* IPCP has gone down */
+extern struct notifier *ip_up_notifier; /* IPCP has come up */
+extern struct notifier *ip_down_notifier; /* IPCP has gone down */
+extern struct notifier *ipv6_up_notifier; /* IPV6CP has come up */
+extern struct notifier *ipv6_down_notifier; /* IPV6CP has gone down */