diff --git a/ipacm/inc/IPACM_Defs.h b/ipacm/inc/IPACM_Defs.h
index 2031fc5..149c03a 100644
--- a/ipacm/inc/IPACM_Defs.h
+++ b/ipacm/inc/IPACM_Defs.h
@@ -173,7 +173,7 @@
 
 	IPA_HANDLE_WAN_UP,                        /* ipacm_event_iface_up  */
 	IPA_HANDLE_WAN_DOWN,                      /* ipacm_event_iface_up  */
-	IPA_HANDLE_WAN_UP_V6,                     /* NULL */
+	IPA_HANDLE_WAN_UP_V6,                     /* ipacm_event_iface_up */
 	IPA_HANDLE_WAN_DOWN_V6,                   /* NULL */
 	IPA_HANDLE_WAN_UP_TETHER,                 /* ipacm_event_iface_up_tehter */
 	IPA_HANDLE_WAN_DOWN_TETHER,               /* ipacm_event_iface_up_tehter */
@@ -186,7 +186,7 @@
 	IPA_ETH_BRIDGE_CLIENT_ADD,                /* ipacm_event_eth_bridge */
 	IPA_ETH_BRIDGE_CLIENT_DEL,                /* ipacm_event_eth_bridge*/
 	IPA_ETH_BRIDGE_WLAN_SCC_MCC_SWITCH,       /* ipacm_event_eth_bridge*/
-	IPA_LAN_DELETE_SELF,                      /* ipacm_event_data_fid */
+	IPA_SSR_NOTICE,						      /* NULL*/
 #ifdef FEATURE_L2TP
 	IPA_ADD_VLAN_IFACE,                       /* ipa_ioc_vlan_iface_info */
 	IPA_DEL_VLAN_IFACE,                       /* ipa_ioc_vlan_iface_info */
@@ -195,6 +195,7 @@
 	IPA_HANDLE_VLAN_CLIENT_INFO,              /* ipacm_event_data_all */
 	IPA_HANDLE_VLAN_IFACE_INFO,               /* ipacm_event_data_all */
 #endif
+	IPA_LAN_DELETE_SELF,                      /* ipacm_event_data_fid */
 	IPACM_EVENT_MAX
 } ipa_cm_event_id;
 
diff --git a/ipacm/src/IPACM_IfaceManager.cpp b/ipacm/src/IPACM_IfaceManager.cpp
index 17f546d..85033a3 100644
--- a/ipacm/src/IPACM_IfaceManager.cpp
+++ b/ipacm/src/IPACM_IfaceManager.cpp
@@ -383,6 +383,7 @@
 #ifdef FEATURE_IPACM_HAL
 				IPACM_EvtDispatcher::registr(IPA_DOWNSTREAM_ADD, wl);
 				IPACM_EvtDispatcher::registr(IPA_DOWNSTREAM_DEL, wl);
+				IPACM_EvtDispatcher::registr(IPA_SSR_NOTICE, wl);
 #endif
 #else
 				IPACM_EvtDispatcher::registr(IPA_HANDLE_WAN_UP, wl);
@@ -449,6 +450,9 @@
 #ifndef FEATURE_IPA_ANDROID
 						IPACM_EvtDispatcher::registr(IPA_WLAN_SWITCH_TO_SCC, w);
 						IPACM_EvtDispatcher::registr(IPA_WLAN_SWITCH_TO_MCC, w);
+#ifdef FEATURE_IPACM_HAL
+						IPACM_EvtDispatcher::registr(IPA_SSR_NOTICE, w);
+#endif
 #endif
 					}
 					else
diff --git a/ipacm/src/IPACM_Main.cpp b/ipacm/src/IPACM_Main.cpp
index 1f92bfa..55a3fd5 100644
--- a/ipacm/src/IPACM_Main.cpp
+++ b/ipacm/src/IPACM_Main.cpp
@@ -713,7 +713,10 @@
 				IPACMERR("calling OffloadMng->elrInstance->onOffloadStopped \n");
 				OffloadMng->elrInstance->onOffloadStopped(IpaEventRelay::ERROR);
 			}
-			continue;
+			/* WA to clean up wlan instances during SSR */
+			evt_data.event = IPA_SSR_NOTICE;
+			evt_data.evt_data = NULL;
+			break;
 		case IPA_SSR_AFTER_POWERUP:
 			IPACMDBG_H("Received IPA_SSR_AFTER_POWERUP\n");
 			OffloadMng = IPACM_OffloadManager::GetInstance();
diff --git a/ipacm/src/IPACM_OffloadManager.cpp b/ipacm/src/IPACM_OffloadManager.cpp
index 4b85c6e..b13460a 100644
--- a/ipacm/src/IPACM_OffloadManager.cpp
+++ b/ipacm/src/IPACM_OffloadManager.cpp
@@ -445,8 +445,14 @@
 			if (upstream_v6_up == false) {
 				IPACMDBG_H("IPV6 gateway: %08x:%08x:%08x:%08x \n",
 						gw_addr_v6.v6Addr[0], gw_addr_v6.v6Addr[1], gw_addr_v6.v6Addr[2], gw_addr_v6.v6Addr[3]);
-				post_route_evt(IPA_IP_v6, index, IPA_WAN_UPSTREAM_ROUTE_ADD_EVENT, gw_addr_v6);
-				upstream_v6_up = true;
+				/* check v6-address valid or not */
+				if((gw_addr_v6.v6Addr[0] == 0) && (gw_addr_v6.v6Addr[1] ==0) && (gw_addr_v6.v6Addr[2] == 0) && (gw_addr_v6.v6Addr[3] == 0))
+				{
+					IPACMDBG_H("Invliad ipv6-address, ignored v6-setupstream\n");
+				} else {
+					post_route_evt(IPA_IP_v6, index, IPA_WAN_UPSTREAM_ROUTE_ADD_EVENT, gw_addr_v6);
+					upstream_v6_up = true;
+				}
 			} else {
 				IPACMDBG_H("already setupstream iface(%s) ipv6 previously\n", upstream_name);
 			}
@@ -480,8 +486,14 @@
 			if (upstream_v6_up == false) {
 				IPACMDBG_H("IPV6 gateway: %08x:%08x:%08x:%08x \n",
 						gw_addr_v6.v6Addr[0], gw_addr_v6.v6Addr[1], gw_addr_v6.v6Addr[2], gw_addr_v6.v6Addr[3]);
-				post_route_evt(IPA_IP_v6, index, IPA_WAN_UPSTREAM_ROUTE_ADD_EVENT, gw_addr_v6);
-				upstream_v6_up = true;
+				/* check v6-address valid or not */
+				if((gw_addr_v6.v6Addr[0] == 0) && (gw_addr_v6.v6Addr[1] ==0) && (gw_addr_v6.v6Addr[2] == 0) && (gw_addr_v6.v6Addr[3] == 0))
+				{
+					IPACMDBG_H("Invliad ipv6-address, ignored v6-setupstream\n");
+				} else {
+					post_route_evt(IPA_IP_v6, index, IPA_WAN_UPSTREAM_ROUTE_ADD_EVENT, gw_addr_v6);
+					upstream_v6_up = true;
+				}
 			} else {
 				IPACMDBG_H("already setupstream iface(%s) ipv6 previously\n", upstream_name);
 				result = SUCCESS_DUPLICATE_CONFIG;
diff --git a/ipacm/src/IPACM_Wan.cpp b/ipacm/src/IPACM_Wan.cpp
index 6d57c39..cf16c71 100644
--- a/ipacm/src/IPACM_Wan.cpp
+++ b/ipacm/src/IPACM_Wan.cpp
@@ -1254,7 +1254,16 @@
 				}
 			}
 			break;
-
+#ifdef FEATURE_IPACM_HAL
+		/* WA for WLAN to clean up NAT instance during SSR */
+		case IPA_SSR_NOTICE: //sky
+			IPACMDBG_H("Received IPA_SSR_NOTICE event.\n");
+			if(m_is_sta_mode == WLAN_WAN)
+			{
+				IPACM_Iface::ipacmcfg->DelNatIfaces(dev_name); // delete NAT-iface
+			}
+		break;
+#endif
 	default:
 		break;
 	}
diff --git a/ipacm/src/IPACM_Wlan.cpp b/ipacm/src/IPACM_Wlan.cpp
index 14fe0b7..ec93233 100644
--- a/ipacm/src/IPACM_Wlan.cpp
+++ b/ipacm/src/IPACM_Wlan.cpp
@@ -910,6 +910,15 @@
 		}
 	}
 	break;
+#ifdef FEATURE_IPACM_HAL
+	/* WA for WLAN to clean up NAT instance during SSR */
+	case IPA_SSR_NOTICE:
+	{
+		IPACMDBG_H("Received IPA_SSR_NOTICE event.\n");
+		IPACM_Iface::ipacmcfg->DelNatIfaces(dev_name); // delete NAT-iface
+	}
+	break;
+#endif
 	default:
 		break;
 	}