diff --git a/manifest/k8s.config b/manifest/k8s.config
index ece212f..5086328 100644
--- a/manifest/k8s.config
+++ b/manifest/k8s.config
@@ -5,6 +5,7 @@
 # ex : k8sVersion={kubernetes version}
 # ex : apiServer={kubernetes API server ip}
 # ex : podSubnet={POD_IP_POOL}/{CIDR}
+# ex : serviceSubnet={serive_subnet}/{CIDR}
 #------------------------------------------------------------------
 #------------------------------------------------------------------
 # ex : imageRegistry=172.22.5.2:5000
@@ -12,6 +13,7 @@
 # ex : k8sVersion=1.19.4
 # ex : apiServer=172.21.7.2
 # ex : podSubnet=10.244.0.0/16
+# ex : serviceSubnet=10.96.0.0/16
 #------------------------------------------------------------------
 
 #image registry
@@ -24,4 +26,5 @@ crioVersion=1.19
 k8sVersion=1.19.4
 apiServer=172.22.5.2
 podSubnet=10.244.0.0/16
+serviceSubnet=10.96.0.0/16