diff --git a/ospf6d/ospf6_area.h b/ospf6d/ospf6_area.h
index e162d21cd2..a44a432a0a 100644
--- a/ospf6d/ospf6_area.h
+++ b/ospf6d/ospf6_area.h
@@ -101,6 +101,7 @@ struct ospf6_area {
 	struct timeval ts_spf; /* SPF calculation time stamp. */
 
 	uint32_t full_nbrs; /* Fully adjacent neighbors. */
+	uint8_t intra_prefix_originate; /* Force intra_prefix lsa originate */
 };
 
 #define OSPF6_AREA_ENABLE     0x01
diff --git a/ospf6d/ospf6_flood.c b/ospf6d/ospf6_flood.c
index dae10dce0d..6040c53dce 100644
--- a/ospf6d/ospf6_flood.c
+++ b/ospf6d/ospf6_flood.c
@@ -156,6 +156,28 @@ void ospf6_lsa_purge(struct ospf6_lsa *lsa)
 	ospf6_lsa_premature_aging(lsa);
 }
 
+/* Puring Multi Link-State IDs LSAs:
+ * Same Advertising Router with Multiple Link-State IDs
+ * LSAs, purging require to traverse all Link-State IDs
+ */
+void ospf6_lsa_purge_multi_ls_id(struct ospf6_area *oa, struct ospf6_lsa *lsa)
+{
+	int ls_id = 0;
+	struct ospf6_lsa *lsa_next;
+	uint16_t type;
+
+	type = lsa->header->type;
+
+	ospf6_lsa_purge(lsa);
+
+	lsa_next = ospf6_lsdb_lookup(type, htonl(++ls_id),
+				     oa->ospf6->router_id, oa->lsdb);
+	while (lsa_next) {
+		ospf6_lsa_purge(lsa_next);
+		lsa_next = ospf6_lsdb_lookup(type, htonl(++ls_id),
+					     oa->ospf6->router_id, oa->lsdb);
+	}
+}
 
 void ospf6_increment_retrans_count(struct ospf6_lsa *lsa)
 {
diff --git a/ospf6d/ospf6_flood.h b/ospf6d/ospf6_flood.h
index f5d33e2843..6931024fff 100644
--- a/ospf6d/ospf6_flood.h
+++ b/ospf6d/ospf6_flood.h
@@ -41,6 +41,9 @@ extern void ospf6_lsa_originate_interface(struct ospf6_lsa *lsa,
 					  struct ospf6_interface *oi);
 extern void ospf6_lsa_purge(struct ospf6_lsa *lsa);
 
+extern void ospf6_lsa_purge_multi_ls_id(struct ospf6_area *oa,
+					struct ospf6_lsa *lsa);
+
 /* access method to retrans_count */
 extern void ospf6_increment_retrans_count(struct ospf6_lsa *lsa);
 extern void ospf6_decrement_retrans_count(struct ospf6_lsa *lsa);
diff --git a/ospf6d/ospf6_intra.c b/ospf6d/ospf6_intra.c
index 14f12d6b6a..c9e2ff9eb5 100644
--- a/ospf6d/ospf6_intra.c
+++ b/ospf6d/ospf6_intra.c
@@ -1015,6 +1015,20 @@ int ospf6_intra_prefix_lsa_originate_stub(struct thread *thread)
 		return 0;
 	}
 
+	/* Neighbor change to FULL, if INTRA-AREA-PREFIX LSA
+	 * has not change, Flush old LSA and Re-Originate INP,
+	 * as ospf6_flood() checks if LSA is same as DB,
+	 * it won't be updated to neighbor's DB.
+	 */
+	if (oa->intra_prefix_originate) {
+		if (IS_OSPF6_DEBUG_ORIGINATE(INTRA_PREFIX))
+			zlog_debug("%s: Re-originate intra prefix LSA, Current full nbrs %u",
+				   __PRETTY_FUNCTION__, oa->full_nbrs);
+		if (old)
+			ospf6_lsa_purge_multi_ls_id(oa, old);
+		oa->intra_prefix_originate = 0;
+	}
+
 	/* put prefixes to advertise */
 	prefix_num = 0;
 	op = (struct ospf6_prefix *)((caddr_t)intra_prefix_lsa
diff --git a/ospf6d/ospf6_neighbor.c b/ospf6d/ospf6_neighbor.c
index 542a24bfc9..16bf2fd8e7 100644
--- a/ospf6d/ospf6_neighbor.c
+++ b/ospf6d/ospf6_neighbor.c
@@ -188,6 +188,9 @@ static void ospf6_neighbor_state_change(u_char next_state,
 			OSPF6_NETWORK_LSA_SCHEDULE(on->ospf6_if);
 			OSPF6_INTRA_PREFIX_LSA_SCHEDULE_TRANSIT(on->ospf6_if);
 		}
+		if (next_state == OSPF6_NEIGHBOR_FULL)
+			on->ospf6_if->area->intra_prefix_originate = 1;
+
 		OSPF6_INTRA_PREFIX_LSA_SCHEDULE_STUB(on->ospf6_if->area);
 
 		if (prev_state == OSPF6_NEIGHBOR_LOADING