diff --git a/core/mac/inc/sir_api.h b/core/mac/inc/sir_api.h
index 3e6eba22aa..2bf0b5ea10 100644
--- a/core/mac/inc/sir_api.h
+++ b/core/mac/inc/sir_api.h
@@ -3865,6 +3865,7 @@ struct sir_nss_update_request {
  * @REASON_COLOR_CHANGE: Color change
  * @REASON_CHANNEL_SWITCH: channel switch
  * @REASON_MLO_IE_UPDATE: mlo ie update
+ * @REASON_RNR_UPDATE: SAP is changed, notify co-located SAP
  */
 enum sir_bcn_update_reason {
 	REASON_DEFAULT = 0,
@@ -3874,6 +3875,7 @@ enum sir_bcn_update_reason {
 	REASON_COLOR_CHANGE = 4,
 	REASON_CHANNEL_SWITCH = 5,
 	REASON_MLO_IE_UPDATE = 6,
+	REASON_RNR_UPDATE = 7,
 };
 
 /**
diff --git a/core/mac/src/include/parser_api.h b/core/mac/src/include/parser_api.h
index 0ce54051aa..bca5fa8c56 100644
--- a/core/mac/src/include/parser_api.h
+++ b/core/mac/src/include/parser_api.h
@@ -1609,4 +1609,31 @@ dot11f_parse_assoc_rsp_mlo_partner_info(struct pe_session *pe_session,
 {
 }
 #endif
+
+/**
+ * populate_dot11f_6g_rnr() - populate rnr with 6g bss information
+ * @mac_ctx: MAC context
+ * @session: reporting session
+ * @dot11f: pointer to tDot11fIEreduced_neighbor_report to fill
+ *
+ * Return: none
+ */
+void populate_dot11f_6g_rnr(struct mac_context *mac_ctx,
+			    struct pe_session *session,
+			    tDot11fIEreduced_neighbor_report *dot11f);
+
+/**
+ * populate_dot11f_rnr_tbtt_info_7() - populate rnr with tbtt_info length 7
+ * @mac_ctx: pointer to mac_context
+ * @pe_session: pe session
+ * @rnr_session: session to populate in rnr ie
+ * @dot11f: tDot11fIEreduced_neighbor_report to be filled
+ *
+ * Return: none
+ */
+void populate_dot11f_rnr_tbtt_info_7(struct mac_context *mac_ctx,
+				     struct pe_session *pe_session,
+				     struct pe_session *rnr_session,
+				     tDot11fIEreduced_neighbor_report *dot11f);
+
 #endif /* __PARSE_H__ */
diff --git a/core/mac/src/pe/lim/lim_utils.c b/core/mac/src/pe/lim/lim_utils.c
index fef0a22b76..2cfade310c 100644
--- a/core/mac/src/pe/lim/lim_utils.c
+++ b/core/mac/src/pe/lim/lim_utils.c
@@ -9318,6 +9318,63 @@ QDF_STATUS lim_ap_mlme_vdev_up_send(struct vdev_mlme_obj *vdev_mlme,
 	return status;
 }
 
+QDF_STATUS lim_ap_mlme_vdev_rnr_notify(struct pe_session *session)
+{
+	struct mac_context *mac_ctx;
+	uint8_t vdev_id_list[MAX_NUMBER_OF_CONC_CONNECTIONS];
+	qdf_freq_t freq_list[MAX_NUMBER_OF_CONC_CONNECTIONS];
+	uint8_t vdev_num;
+	uint8_t i;
+	struct pe_session *co_session;
+	QDF_STATUS status = QDF_STATUS_SUCCESS;
+
+	mac_ctx = cds_get_context(QDF_MODULE_ID_PE);
+	if (!mac_ctx) {
+		pe_err("mac ctx is null");
+		return QDF_STATUS_E_INVAL;
+	}
+	if (!session) {
+		pe_err("session is NULL");
+		return QDF_STATUS_E_INVAL;
+	}
+	if (!mlme_is_notify_co_located_ap_update_rnr(session->vdev))
+		return status;
+	mlme_set_notify_co_located_ap_update_rnr(session->vdev, false);
+	// Only 6G SAP need to notify co-located SAP to add RNR
+	if (!wlan_reg_is_6ghz_chan_freq(session->curr_op_freq))
+		return status;
+	pe_debug("vdev id %d non mlo 6G AP notify co-located AP to update RNR",
+		 wlan_vdev_get_id(session->vdev));
+	vdev_num = policy_mgr_get_mode_specific_conn_info(
+			mac_ctx->psoc, freq_list, vdev_id_list,
+			PM_SAP_MODE);
+	for (i = 0; i < vdev_num; i++) {
+		if (vdev_id_list[i] == session->vdev_id)
+			continue;
+		if (wlan_reg_is_6ghz_chan_freq(freq_list[i]))
+			continue;
+		co_session = pe_find_session_by_vdev_id(mac_ctx,
+							vdev_id_list[i]);
+		if (!co_session)
+			continue;
+
+		status = sch_set_fixed_beacon_fields(mac_ctx, co_session);
+		if (QDF_IS_STATUS_ERROR(status)) {
+			pe_err("Unable to update 6g co located RNR in beacon");
+			return status;
+		}
+
+		status = lim_send_beacon_ind(mac_ctx, co_session,
+					     REASON_RNR_UPDATE);
+		if (QDF_IS_STATUS_ERROR(status)) {
+			pe_err("Unable to send beacon indication");
+			return status;
+		}
+	}
+
+	return status;
+}
+
 QDF_STATUS lim_ap_mlme_vdev_disconnect_peers(struct vdev_mlme_obj *vdev_mlme,
 					     uint16_t data_len, void *data)
 {
@@ -9356,6 +9413,10 @@ QDF_STATUS lim_ap_mlme_vdev_stop_send(struct vdev_mlme_obj *vdev_mlme,
 		return QDF_STATUS_E_INVAL;
 	}
 
+	if (!wlan_vdev_mlme_is_mlo_ap(vdev_mlme->vdev)) {
+		mlme_set_notify_co_located_ap_update_rnr(vdev_mlme->vdev, true);
+		lim_ap_mlme_vdev_rnr_notify(session);
+	}
 	status =  lim_send_vdev_stop(session);
 
 	return status;
diff --git a/core/mac/src/pe/lim/lim_utils.h b/core/mac/src/pe/lim/lim_utils.h
index 2540b2757f..994e9960b2 100644
--- a/core/mac/src/pe/lim/lim_utils.h
+++ b/core/mac/src/pe/lim/lim_utils.h
@@ -2448,6 +2448,15 @@ QDF_STATUS lim_sap_move_to_cac_wait_state(struct pe_session *session);
  */
 void lim_disconnect_complete(struct pe_session *session, bool del_bss);
 
+/**
+ * lim_ap_mlme_vdev_rnr_notify() - SAP is changed, notify co-located sap to
+ *                                 update RNR IE
+ * @session: PE session pointer
+ *
+ * Return: QDF_STATUS
+ */
+QDF_STATUS lim_ap_mlme_vdev_rnr_notify(struct pe_session *session);
+
 /**
  * lim_sta_mlme_vdev_stop_send() - send VDEV stop
  * @vdev_mlme_obj:  VDEV MLME comp object
diff --git a/core/mac/src/pe/sch/sch_api.c b/core/mac/src/pe/sch/sch_api.c
index ea38ca55af..7b645884ff 100644
--- a/core/mac/src/pe/sch/sch_api.c
+++ b/core/mac/src/pe/sch/sch_api.c
@@ -202,6 +202,8 @@ QDF_STATUS sch_send_beacon_req(struct mac_context *mac, uint8_t *beaconPayload,
 	if (QDF_IS_STATUS_SUCCESS(retCode)) {
 		if (wlan_vdev_mlme_is_mlo_ap(pe_session->vdev))
 			lim_notify_link_info(pe_session);
+		else
+			lim_ap_mlme_vdev_rnr_notify(pe_session);
 	}
 
 	return retCode;
diff --git a/core/mac/src/pe/sch/sch_beacon_gen.c b/core/mac/src/pe/sch/sch_beacon_gen.c
index 5e2c3d7c7e..5e51c15f3e 100644
--- a/core/mac/src/pe/sch/sch_beacon_gen.c
+++ b/core/mac/src/pe/sch/sch_beacon_gen.c
@@ -810,6 +810,14 @@ sch_set_fixed_beacon_fields(struct mac_context *mac_ctx, struct pe_session *sess
 			populate_dot11f_mlo_rnr(
 				mac_ctx, session,
 				&bcn_2->reduced_neighbor_report);
+		} else if (!wlan_reg_is_6ghz_chan_freq(session->curr_op_freq)) {
+			/*
+			 * TD: If current AP is MLO, RNR IE is already populated
+			 *     More effor to populate RNR IE for
+			 *     MLO SAP + 6G legacy SAP
+			 */
+			populate_dot11f_6g_rnr(mac_ctx, session,
+					       &bcn_2->reduced_neighbor_report);
 		}
 		/*
 		 * Can be efficiently updated whenever new IE added  in Probe
diff --git a/core/mac/src/sys/legacy/src/utils/src/parser_api.c b/core/mac/src/sys/legacy/src/utils/src/parser_api.c
index 37aea6a485..b2412dd6be 100644
--- a/core/mac/src/sys/legacy/src/utils/src/parser_api.c
+++ b/core/mac/src/sys/legacy/src/utils/src/parser_api.c
@@ -8865,4 +8865,122 @@ QDF_STATUS populate_dot11f_assoc_req_mlo_ie(struct mac_context *mac_ctx,
 	return QDF_STATUS_SUCCESS;
 }
 #endif
+
+void populate_dot11f_rnr_tbtt_info_7(struct mac_context *mac_ctx,
+				     struct pe_session *pe_session,
+				     struct pe_session *rnr_session,
+				     tDot11fIEreduced_neighbor_report *dot11f)
+{
+	uint8_t reg_class;
+	uint8_t ch_offset;
+
+	dot11f->present = 1;
+	dot11f->tbtt_type = 0;
+	if (rnr_session->ch_width == CH_WIDTH_80MHZ) {
+		ch_offset = BW80;
+	} else {
+		switch (rnr_session->htSecondaryChannelOffset) {
+		case PHY_DOUBLE_CHANNEL_HIGH_PRIMARY:
+			ch_offset = BW40_HIGH_PRIMARY;
+			break;
+		case PHY_DOUBLE_CHANNEL_LOW_PRIMARY:
+			ch_offset = BW40_LOW_PRIMARY;
+			break;
+		default:
+			ch_offset = BW20;
+			break;
+		}
+	}
+
+	reg_class = lim_op_class_from_bandwidth(mac_ctx,
+						rnr_session->curr_op_freq,
+						rnr_session->ch_width,
+						ch_offset);
+
+	dot11f->op_class = reg_class;
+	dot11f->channel_num = wlan_reg_freq_to_chan(mac_ctx->pdev,
+						    rnr_session->curr_op_freq);
+	dot11f->tbtt_info_count = 0;
+	dot11f->tbtt_info_len = 7;
+	dot11f->tbtt_info.tbtt_info_7.tbtt_offset =
+			WLAN_RNR_TBTT_OFFSET_INVALID;
+	qdf_mem_copy(dot11f->tbtt_info.tbtt_info_7.bssid,
+		     rnr_session->self_mac_addr, sizeof(tSirMacAddr));
+}
+
+/**
+ * lim_is_6g_vdev() - loop every vdev to populate 6g vdev id
+ * @psoc: pointer to psoc
+ * @obj: vdev
+ * @args: vdev list to record 6G vdev id
+ *
+ * Return: void
+ */
+static void lim_is_6g_vdev(struct wlan_objmgr_psoc *psoc, void *obj, void *args)
+{
+	struct wlan_objmgr_vdev *vdev = (struct wlan_objmgr_vdev *)obj;
+	uint8_t *vdev_id_list = (uint8_t *)args;
+	int i;
+
+	if (!vdev || (wlan_vdev_mlme_get_opmode(vdev) != QDF_SAP_MODE))
+		return;
+	if (QDF_IS_STATUS_ERROR(wlan_vdev_chan_config_valid(vdev)))
+		return;
+	if (!wlan_reg_is_6ghz_chan_freq(wlan_get_operation_chan_freq(vdev)))
+		return;
+
+	for (i = 0; i < MAX_NUMBER_OF_CONC_CONNECTIONS; i++) {
+		if (vdev_id_list[i] == INVALID_VDEV_ID) {
+			vdev_id_list[i] = wlan_vdev_get_id(vdev);
+			break;
+		}
+	}
+}
+
+void populate_dot11f_6g_rnr(struct mac_context *mac_ctx,
+			    struct pe_session *session,
+			    tDot11fIEreduced_neighbor_report *dot11f)
+{
+	struct pe_session *co_session;
+	struct wlan_objmgr_psoc *psoc;
+	int vdev_id;
+	uint8_t vdev_id_list[MAX_NUMBER_OF_CONC_CONNECTIONS];
+
+	if (!session || !mac_ctx || !dot11f || !session->vdev) {
+		pe_err("Invalid params");
+		return;
+	}
+
+	psoc = wlan_vdev_get_psoc(session->vdev);
+	if (!psoc) {
+		pe_err("Invalid psoc");
+		return;
+	}
+
+	for (vdev_id = 0; vdev_id < MAX_NUMBER_OF_CONC_CONNECTIONS; vdev_id++)
+		vdev_id_list[vdev_id] = INVALID_VDEV_ID;
+
+	wlan_objmgr_iterate_obj_list(psoc, WLAN_VDEV_OP,
+				     lim_is_6g_vdev,
+				     vdev_id_list, 1,
+				     WLAN_LEGACY_MAC_ID);
+
+	if (vdev_id_list[0] == INVALID_VDEV_ID) {
+		pe_debug("vdev id %d no 6G vdev, no need to populate RNR IE",
+			 wlan_vdev_get_id(session->vdev));
+		return;
+	}
+
+	co_session = pe_find_session_by_vdev_id(mac_ctx,
+						vdev_id_list[0]);
+	if (!co_session) {
+		pe_err("Invalid co located session");
+		return;
+	}
+	populate_dot11f_rnr_tbtt_info_7(mac_ctx, session, co_session, dot11f);
+	pe_debug("vdev id %d populate RNR IE with 6G vdev id %d op class %d chan num %d",
+		 wlan_vdev_get_id(session->vdev),
+		 wlan_vdev_get_id(co_session->vdev),
+		 dot11f->op_class, dot11f->channel_num);
+}
 /* parser_api.c ends here. */