diff --git a/doc/user/ospfd.rst b/doc/user/ospfd.rst
index 9491c5e42f..4e30ef2aec 100644
--- a/doc/user/ospfd.rst
+++ b/doc/user/ospfd.rst
@@ -887,8 +887,8 @@ Showing Information
 .. clicmd:: show ip ospf route [detail] [json]
 
    Show the OSPF routing table, as determined by the most recent SPF
-   calculation. If detail is specified, each routing item's
-   advertiser will be show up.
+   calculation. When detail option is used, it shows more information
+   to the CLI like advertising router ID for each route, etc.
 
 .. clicmd:: show ip ospf [vrf <NAME|all>] border-routers [json]
 
diff --git a/ospfd/ospf_route.c b/ospfd/ospf_route.c
index e32e06e7a4..3ffa7c0bb1 100644
--- a/ospfd/ospf_route.c
+++ b/ospfd/ospf_route.c
@@ -48,6 +48,7 @@ struct ospf_route *ospf_route_new(void)
 
 	new->paths = list_new();
 	new->paths->del = (void (*)(void *))ospf_path_free;
+	new->u.std.transit = false;
 
 	return new;
 }
@@ -500,6 +501,7 @@ void ospf_intra_add_transit(struct route_table *rt, struct vertex *v,
 	or->cost = v->distance;
 	or->type = OSPF_DESTINATION_NETWORK;
 	or->u.std.origin = (struct lsa_header *)lsa;
+	or->u.std.transit = true;
 
 	ospf_route_copy_nexthops_from_vertex(area, or, v);
 
diff --git a/ospfd/ospf_route.h b/ospfd/ospf_route.h
index 7639a0049e..44e80216d7 100644
--- a/ospfd/ospf_route.h
+++ b/ospfd/ospf_route.h
@@ -69,6 +69,8 @@ struct route_standard {
 
 	/*  */
 	uint8_t flags; /* From router-LSA */
+
+	bool transit; /* Transit network or not */
 };
 
 struct route_external {
diff --git a/ospfd/ospf_vty.c b/ospfd/ospf_vty.c
index 0438bbcdf8..a23802719b 100644
--- a/ospfd/ospf_vty.c
+++ b/ospfd/ospf_vty.c
@@ -10792,15 +10792,17 @@ static void show_ip_ospf_route_network(struct vty *vty, struct ospf *ospf,
 			if (json) {
 				json_object_string_add(json_route, "routeType",
 						       "N");
+				json_object_boolean_add(json_route, "transit",
+							or->u.std.transit);
 				json_object_int_add(json_route, "cost",
 						    or->cost);
 				json_object_string_addf(json_route, "area",
 							"%pI4",
 							&or->u.std.area_id);
 			} else {
-				vty_out(vty, "N    %-18s    [%d] area: %pI4\n",
-					buf1, or->cost,
-					&or->u.std.area_id);
+				vty_out(vty, "N %s  %-18s    [%d] area: %pI4\n",
+					or->u.std.transit && detail ? "T" : " ",
+					buf1, or->cost, &or->u.std.area_id);
 			}
 			break;
 		default:
@@ -10859,7 +10861,8 @@ static void show_ip_ospf_route_network(struct vty *vty, struct ospf *ospf,
 									ospf->vrf_id));
 							json_object_string_addf(
 								json_nexthop,
-								"adv", "%pI4",
+								"advertisedRouter",
+								"%pI4",
 								&path->adv_router);
 						} else {
 							vty_out(vty,
@@ -11134,7 +11137,8 @@ static void show_ip_ospf_route_external(struct vty *vty, struct ospf *ospf,
 								path->ifindex,
 								ospf->vrf_id));
 						json_object_string_addf(
-							json_nexthop, "adv",
+							json_nexthop,
+							"advertisedRouter",
 							"%pI4",
 							&path->adv_router);
 					} else {
@@ -11464,6 +11468,12 @@ static int show_ip_ospf_route_common(struct vty *vty, struct ospf *ospf,
 		return CMD_SUCCESS;
 	}
 
+	if (detail && json == NULL) {
+		vty_out(vty, "Codes: N  - network     T - transitive\n");
+		vty_out(vty, "       IA - inter-area  E - external route\n");
+		vty_out(vty, "       D  - destination R - router\n\n");
+	}
+
 	/* Show Network routes. */
 	show_ip_ospf_route_network(vty, ospf, ospf->new_table, json_vrf,
 				   detail);