diff --git a/Platform/user/configm/config-server/include/ipconfig.h b/Platform/user/configm/config-server/include/ipconfig.h
index cd71cfa95..4a23fcb1f 100644
--- a/Platform/user/configm/config-server/include/ipconfig.h
+++ b/Platform/user/configm/config-server/include/ipconfig.h
@@ -91,7 +91,7 @@ typedef struct _if_v4addr_str v4addr_str;
 
 struct _if_v6addr_str {
     char addr[DOT_IPV6_STR];
-    int  prefixlen;
+    char prefixlen[IF_INFO_STR];
 };
 typedef struct _if_v6addr_str v6addr_str;
 
diff --git a/Platform/user/configm/config-server/netconfig/ifconfig.c b/Platform/user/configm/config-server/netconfig/ifconfig.c
index 2e702bd84..baa87ce24 100644
--- a/Platform/user/configm/config-server/netconfig/ifconfig.c
+++ b/Platform/user/configm/config-server/netconfig/ifconfig.c
@@ -134,13 +134,13 @@ ret_code if_get_v4proto(if_info_t *if_info)
     
     if_conf_file_get(if_info->ifname, iface, protostr);
     
-    if(strstr(protostr, "static"))
+    if(strstr(protostr, "dhcp"))
     {
-        strcpy(if_info->v4protocol, "static");
+        strcpy(if_info->v4protocol, "dhcp");
     }
     else 
     {
-        strcpy(if_info->v4protocol, "dhcp");
+        strcpy(if_info->v4protocol, "static");
     }
     
     return RET_OK;
@@ -156,13 +156,13 @@ ret_code if_get_v6proto(if_info_t *if_info)
     
     if_conf_file_get(if_info->ifname, iface, protostr);
     
-    if(strstr(protostr, "static"))
+    if(strstr(protostr, "dhcp"))
     {
-        strcpy(if_info->v6protocol, "static");
+        strcpy(if_info->v6protocol, "dhcp");
     }
     else 
     {
-        strcpy(if_info->v6protocol, "dhcp");
+        strcpy(if_info->v6protocol, "static");
     }
     
     return RET_OK;
@@ -401,7 +401,8 @@ ret_code if_del_oldin6(char *name, struct in6_ifreq *ifr6)
 
     for(i = 0; i < addr_cnt; i++)
     {
-        if(IPV6_ADDR_CMP(&(ifr6->ifr6_addr), &(ipv6_arr[i].addr)) == 0)
+        if(IPV6_ADDR_CMP(&(ifr6->ifr6_addr), &(ipv6_arr[i].addr)) == 0
+           && ifr6->ifr6_prefixlen == ipv6_arr[i].prefixlen)
         {
             ret = RET_EXIST;
             continue;
@@ -508,11 +509,11 @@ int if_get_prefix6(if_info_t *if_conf)
 
     for(i = 0; i < addr_cnt && i < IPV6_ADDR_NUM; i++)
     {
-        inet_ntop(AF_INET6, &ipv6_arr[i].addr, if_conf->ipv6[addr_cnt].addr, DOT_IPV6_STR);
-        if_conf->ipv6[addr_cnt].prefixlen = ipv6_arr[i].prefixlen;
+        inet_ntop(AF_INET6, &ipv6_arr[i].addr, if_conf->ipv6[i].addr, DOT_IPV6_STR);
+        snprintf(if_conf->ipv6[i].prefixlen, IF_INFO_STR, "%d", ipv6_arr[i].prefixlen);
     }
     
-    return addr_cnt;
+    return i;
     
 }
 
diff --git a/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c b/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
index 401e84386..1fc10f65c 100644
--- a/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
+++ b/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
@@ -194,7 +194,7 @@ cJSON *ipv6_format_json(if_info_t *config_buff, int v6_cnt)
         s2j_create_json_obj(json_ipv6);
 
         s2j_json_set_basic_element(json_ipv6, if_ipv6, string, addr);
-        s2j_json_set_basic_element(json_ipv6, if_ipv6, int, prefixlen);
+        s2j_json_set_basic_element(json_ipv6, if_ipv6, string, prefixlen);
 
         cJSON_AddItemToArray(json_array, json_ipv6);
     }
@@ -249,35 +249,33 @@ ret_code if_get_info(if_info_t *if_info, int *v6_cnt)
     ret_code ret = RET_OK;
 
     ret = if_get_ipenable(if_info);
-    ASSERT_RET(ret);
+    ASSERT_RET_NO(ret);
     
     ret = if_get_v4proto(if_info);
-    ASSERT_RET(ret);
+    ASSERT_RET_NO(ret);
 
     ret = if_get_v6proto(if_info);
-    ASSERT_RET(ret);
+    ASSERT_RET_NO(ret);
 
     ret = if_get_hwaddr(if_info);
-    ASSERT_RET(ret);
+    ASSERT_RET_NO(ret);
     
-    ret = if_get_maxspeed(if_info);
-    //ASSERT_RET(ret);
+    if_get_maxspeed(if_info);
 
     ret = if_get_linkstat(if_info);
-    ASSERT_RET(ret);
+    ASSERT_RET_NO(ret);
     
     ret = if_get_prefix(if_info);
-    ASSERT_RET(ret);
+    ASSERT_RET_NO(ret);
 
     ret = if_read_stats_file(if_info);
-    ASSERT_RET(ret);
+    ASSERT_RET_NO(ret);
 
     *v6_cnt = if_get_prefix6(if_info);
 
-    return ret;
+    return RET_OK;
 }
 
-
 ret_code ip_config_v4chk(uint config_type, ip_config_t *ip_conf)
 {
     ret_code ret = RET_OK;
@@ -547,6 +545,10 @@ ret_code ip_config_get_all(uint source, pointer output, int *output_len)
 
     for(i = 0; i < if_count; i++)
     {
+        if(strcmp(ifreq[i].ifr_name, "lo") == 0)
+        {
+            continue;
+        }
         rpc_log_info("get interface %s info\n", ifreq[i].ifr_name);
         strncpy(if_info[i].ifname, ifreq[i].ifr_name, INTERFACE_NAMSIZ - 1);