+ DHCPV6_OPT_SIP_SERVER_D = 21,
+ DHCPV6_OPT_SIP_SERVER_A = 22,
+ DHCPV6_OPT_AFTR_NAME = 64,
+ DHCPV6_OPT_PD_EXCLUDE = 67,
+#ifdef EXT_PREFIX_CLASS
+ /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
+ DHCPV6_OPT_PREFIX_CLASS = EXT_PREFIX_CLASS,
+#endif