diff --git a/ipacm/inc/IPACM_Lan.h b/ipacm/inc/IPACM_Lan.h
index 83b2211..bf815c5 100644
--- a/ipacm/inc/IPACM_Lan.h
+++ b/ipacm/inc/IPACM_Lan.h
@@ -396,8 +396,8 @@
 				{
 					for(num_v6 =0;num_v6 < get_client_memptr(eth_client, clt_indx)->route_rule_set_v6;num_v6++)
 					{
-						/* send client-v6 delete to pcie modem only with global ipv6 with tx_index = 0 one time*/
-						if(is_global_ipv6_addr(get_client_memptr(eth_client, clt_indx)->v6_addr[num_v6]) && (IPACM_Wan::backhaul_mode == Q6_MHI_WAN) && (tx_index == 0)
+						/* send client-v6 delete to pcie modem only with global ipv6 with tx_index = 1 one time*/
+						if(is_global_ipv6_addr(get_client_memptr(eth_client, clt_indx)->v6_addr[num_v6]) && (IPACM_Wan::backhaul_mode == Q6_MHI_WAN)
 							&& (get_client_memptr(eth_client, clt_indx)->v6_rt_rule_id[num_v6] > 0))
 						{
 							IPACMDBG_H("Delete client index %d ipv6 RT-rules for %d-st ipv6 for rule-id:%d\n", clt_indx,num_v6,
diff --git a/ipacm/inc/IPACM_Wlan.h b/ipacm/inc/IPACM_Wlan.h
index f7508db..9c828ee 100644
--- a/ipacm/inc/IPACM_Wlan.h
+++ b/ipacm/inc/IPACM_Wlan.h
@@ -189,7 +189,7 @@
 					for(num_v6 =0;num_v6 < get_client_memptr(wlan_client, clt_indx)->route_rule_set_v6;num_v6++)
 					{
 						/* send client-v6 delete to pcie modem only with global ipv6 with tx_index = 0 one time*/
-						if(is_global_ipv6_addr(get_client_memptr(wlan_client, clt_indx)->v6_addr[num_v6]) && (IPACM_Wan::backhaul_mode == Q6_MHI_WAN) && (tx_index == 0)
+						if(is_global_ipv6_addr(get_client_memptr(wlan_client, clt_indx)->v6_addr[num_v6]) && (IPACM_Wan::backhaul_mode == Q6_MHI_WAN)
 							&& (get_client_memptr(wlan_client, clt_indx)->v6_rt_rule_id[num_v6] > 0))
 						{
 							IPACMDBG_H("Delete client index %d ipv6 RT-rules for %d-st ipv6 for rule-id:%d\n", clt_indx,num_v6,
diff --git a/ipacm/src/IPACM_Lan.cpp b/ipacm/src/IPACM_Lan.cpp
index 8067053..9dfac2e 100644
--- a/ipacm/src/IPACM_Lan.cpp
+++ b/ipacm/src/IPACM_Lan.cpp
@@ -2425,7 +2425,7 @@
 					IPACMDBG_H("tx:%d, rt rule hdl=%x ip-type: %d\n", tx_index,
 		            				 get_client_memptr(eth_client, eth_index)->eth_rt_hdl[tx_index].eth_rt_rule_hdl_v6_wan[v6_num], iptype);
 
-					/* send client-v6 info to pcie modem only with global ipv6 with tx_index = 0 one time*/
+					/* send client-v6 info to pcie modem only with global ipv6 with tx_index = 1 one time*/
 					if(is_global_ipv6_addr(get_client_memptr(eth_client, eth_index)->v6_addr[v6_num]) && (IPACM_Wan::backhaul_mode == Q6_MHI_WAN))
 					{
 						if (add_connection(eth_index, v6_num))
@@ -6132,7 +6132,7 @@
 	}
 
 	get_client_memptr(eth_client, client_index)->v6_rt_rule_id[v6_num] = pFilteringTable->rules[0].flt_rule_hdl;
-
+	IPACMDBG_H("%d-st client v6_num %d: id handle 0x%x\n", client_index, v6_num, get_client_memptr(eth_client, client_index)->v6_rt_rule_id[v6_num]);
 fail:
 	close(fd);
 	if(pFilteringTable != NULL)
diff --git a/ipacm/src/IPACM_OffloadManager.cpp b/ipacm/src/IPACM_OffloadManager.cpp
index 0e6a53e..7919413 100644
--- a/ipacm/src/IPACM_OffloadManager.cpp
+++ b/ipacm/src/IPACM_OffloadManager.cpp
@@ -603,7 +603,7 @@
 		return FAIL_INPUT_CHECK;
 	}
 
-	IPACMDBG_H("SET_DATA_QUOTA %s %llu", quota.interface_name, (long long)mb);
+	IPACMDBG_H("SET_DATA_QUOTA %s %llu\n", quota.interface_name, (long long)mb);
 
 	rc = ioctl(fd, WAN_IOC_SET_DATA_QUOTA, &quota);
 
@@ -778,12 +778,14 @@
 bool IPACM_OffloadManager::search_framwork_cache(char * interface_name)
 {
 	bool rel = false;
+	bool cache_need = false;
 
 	/* IPACM needs to kee old FDs, can't clear */
 	IPACMDBG_H("check netdev(%s)\n", interface_name);
 
 	for(int i = 0; i < MAX_EVENT_CACHE ;i++)
 	{
+		cache_need = false;
 		if(event_cache[i].valid == true)
 		{
 			//do the compare
@@ -793,14 +795,40 @@
 			{
 				IPACMDBG_H("found netdev (%s) in entry (%d) with event (%d)\n", interface_name, i, event_cache[i].event);
 				/* post event again */
-				if (event_cache[i].event == IPA_DOWNSTREAM_ADD)
+				if (event_cache[i].event == IPA_DOWNSTREAM_ADD) {
+					/* check if downsteam netdev driver finished its configuration on IPA-HW for ipv4 and ipv6 */
+					if (event_cache[i].prefix_cache.fam == V4 && IPACM_Iface::ipacmcfg->CheckNatIfaces(event_cache[i].dev_name, IPA_IP_v4))
+						cache_need = true;
+					if (event_cache[i].prefix_cache.fam == V6 && IPACM_Iface::ipacmcfg->CheckNatIfaces(event_cache[i].dev_name, IPA_IP_v6))
+						cache_need = true;
+					if (cache_need) {
+						IPACMDBG_H("still need cache (%d), index (%d) ip-family (%d)\n", cache_need, i, event_cache[i].prefix_cache.fam);
+						break;
+					} else {
+						IPACMDBG_H("no need cache (%d), handling it event (%d)\n", cache_need, event_cache[i].event);
 					addDownstream(interface_name, event_cache[i].prefix_cache);
-				else if (event_cache[i].event == IPA_WAN_UPSTREAM_ROUTE_ADD_EVENT)
+					}
+				} else if (event_cache[i].event == IPA_WAN_UPSTREAM_ROUTE_ADD_EVENT) {
+					/* check if upstream netdev driver finished its configuration on IPA-HW for ipv4 and ipv6 */
+					if (event_cache[i].prefix_cache.fam == V4 && IPACM_Iface::ipacmcfg->CheckNatIfaces(event_cache[i].dev_name, IPA_IP_v4))
+						cache_need = true;
+					if (event_cache[i].prefix_cache_v6.fam == V6 && IPACM_Iface::ipacmcfg->CheckNatIfaces(event_cache[i].dev_name, IPA_IP_v6))
+						cache_need = true;
+					if (cache_need) {
+						IPACMDBG_H("still need cache (%d), index (%d)\n", cache_need, i);
+						break;
+					} else {
+						IPACMDBG_H("no need cache (%d), handling it event (%d)\n", cache_need, event_cache[i].event);
 					setUpstream(interface_name, event_cache[i].prefix_cache, event_cache[i].prefix_cache_v6);
-				else
-					IPACMERR("wrong event cached (%d)", event_cache[i].event);
+					}
+				} else {
+						IPACMERR("wrong event cached (%d) index (%d)\n", event_cache[i].event, i);
+				}
+
+				/* reset entry */
 				event_cache[i].valid = false;
 				rel = true;
+				IPACMDBG_H("reset entry (%d)", i);
 			}
 		}
 	}
diff --git a/ipacm/src/IPACM_Wan.cpp b/ipacm/src/IPACM_Wan.cpp
index 823fe96..498f3b6 100644
--- a/ipacm/src/IPACM_Wan.cpp
+++ b/ipacm/src/IPACM_Wan.cpp
@@ -1345,6 +1345,7 @@
 					else if(m_is_sta_mode == Q6_MHI_WAN)
 					{
 						/* only need cleanup rt-rule*/
+						del_dft_firewall_rules(IPA_IP_v4);
 						handle_route_del_evt(IPA_IP_v4);
 					}
 					else
@@ -1379,6 +1380,7 @@
 					else if(m_is_sta_mode == Q6_MHI_WAN)
 					{
 						/* only need cleanup rt-rule*/
+						del_dft_firewall_rules(IPA_IP_v6);
 						handle_route_del_evt(IPA_IP_v6);
 					}
 
@@ -7321,7 +7323,8 @@
 
 int IPACM_Wan::delete_offload_frag_rule()
 {
-	int len, res = true;
+	int res = IPACM_SUCCESS;
+	int len;
 	ipa_ioc_del_flt_rule *pFilteringTable = NULL;
 
 	struct ipa_flt_rule_del flt_rule_entry;
diff --git a/ipacm/src/IPACM_Wlan.cpp b/ipacm/src/IPACM_Wlan.cpp
index 173c41f..b7fb9ff 100644
--- a/ipacm/src/IPACM_Wlan.cpp
+++ b/ipacm/src/IPACM_Wlan.cpp
@@ -2526,6 +2526,7 @@
 	}
 
 	get_client_memptr(wlan_client, client_index)->v6_rt_rule_id[v6_num] = pFilteringTable->rules[0].flt_rule_hdl;
+	IPACMDBG_H("%d-st client v6_num %d: id handle 0x%x\n", client_index, v6_num, get_client_memptr(wlan_client, client_index)->v6_rt_rule_id[v6_num]);
 
 fail:
 	close(fd);