From 4800d7ec6aaf7c1f1f3366dc1cfb9574e6305b51 Mon Sep 17 00:00:00 2001
From: jian-hong-wu <84126739+jian-hong-wu@users.noreply.github.com>
Date: Sun, 29 Aug 2021 10:36:38 +0800
Subject: [PATCH] Create index.md

---
 usecases/spine_leaf/index.md | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 usecases/spine_leaf/index.md

diff --git a/usecases/spine_leaf/index.md b/usecases/spine_leaf/index.md
new file mode 100644
index 0000000..4bcdee3
--- /dev/null
+++ b/usecases/spine_leaf/index.md
@@ -0,0 +1,6 @@
+[上一頁](/blog/usecases)
+
+### Spine-leaf topology
+
+use two racks, 
+