diff --git a/README.md b/README.md
index e69de29..af4aa09 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,32 @@
+
+
+Topology:
+```
+	     infrastructure  	 services
+	    +---------------+ 	+---------------+	
+
+		 ns					 ssh
+
+	>--- gate				 openvpn
+
+		 proxy				 nextcloud
+
+							 ...
+```
+
+
+Options:
+- `CT_GROUP=1000` (range: 1000-1999)
+  Set the network base ID
+
+- `CT_INFRASTRUCTURE=100..199`
+  Set the infrastructure base id
+
+- `CT_SERVICES=200..299`
+
+- `CT_TEMPLATES=900..999`
+
+
+
+
+<!-- vim:set ts=4 sw=4 : -->