diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5824c9d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,13 @@
+# xdipisec
+
+## intro
+
+xdipisec is L2 (transparent) IPsec tunnel load balance
+
+
+## how it works
+
+across a set of segw. in this case, there are 3 serving segw implemented on Nokia SR-OS virtual sim's.
+
+![the diagram shows the idea](./pictures/scpy.png)
+