diff --git a/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c b/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
index 054354c84..28f433ba0 100644
--- a/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
+++ b/Platform/user/configm/config-server/netconfig/ipconfig/ipconfig.c
@@ -327,7 +327,7 @@ ret_code if_get_prefix_all(pointer output, int *output_len, int *code)
     struct sockaddr_in *addr;    
     struct ifreq netmask;
     ip_config_t *ip_conf;
-    struct ifconf ifc;    
+    struct ifconf ifc;
     int if_count = 0;
     ret_code ret;
     int mask_ret;
@@ -361,24 +361,18 @@ ret_code if_get_prefix_all(pointer output, int *output_len, int *code)
     ip_conf = rpc_new0(ip_config_t, MAX_IF_NUM);
     if(ip_conf == NULL)
     {
-     return RET_NOMEM;
+        return RET_NOMEM;
     }
 
     for(i = 0; i < if_count; i++)
-    {
-     rpc_log_info("get interface %s info\n", ifreq[i].ifr_name);
-     strncpy(ip_conf[i].ifname, ifreq[i].ifr_name, INTERFACE_NAMSIZ - 1);
-     ip_conf[i].family = AF_INET;
-     ip_conf[i].prefix = ((struct sockaddr_in *)&(ifreq[i].ifr_addr))->sin_addr;
+    {        
+        rpc_log_info("get interface %s info\n", ifreq[i].ifr_name);
 
-     memset(&netmask, 0, sizeof(netmask));
-     strncpy(netmask.ifr_name, ifreq[i].ifr_name, sizeof(netmask.ifr_name) - 1);
-     
-     ret = if_ioctl(SIOCGIFNETMASK, (caddr_t)&netmask, &mask_ret);
-     ASSERT_RET_NO(ret);
+        strncpy(ip_conf[i].ifname, ifreq[i].ifr_name, INTERFACE_NAMSIZ - 1);
+        ip_conf[i].family = AF_INET;
+
+        if_get_prefix(&ip_conf[i], code);
 
-     addr = ( struct sockaddr_in * )&(netmask.ifr_netmask);
-     ip_conf[i].prefixlen = ip_masklen(addr->sin_addr);
     }
 
     ip_config_format_json_array(ip_conf, if_count, output, output_len);