From be1be19f11f54a3ce5af68c0c0a429104ca0d352 Mon Sep 17 00:00:00 2001
From: Tomofumi Hayashi <s1061123@gmail.com>
Date: Thu, 15 Nov 2018 16:01:03 +0100
Subject: [PATCH] Add more paragraph.

---
 doc/how-to-use.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/how-to-use.md b/doc/how-to-use.md
index 1c4f33f0a..9f2ee4864 100644
--- a/doc/how-to-use.md
+++ b/doc/how-to-use.md
@@ -189,6 +189,11 @@ EOF
 
 ### Create network attachment definition
 
+The 'NetworkAttachmentDefinition' is used to setup the network attachment, i.e. secondary interface for the pod, There are two ways to configure the 'NetworkAttachmentDefinition' as following:
+
+- NetworkAttachmentDefinition with json CNI config
+- NetworkAttachmentDefinition with CNI config file
+
 #### NetworkAttachmentDefinition with json CNI config:
 
 Following command creates NetworkAttachmentDefinition. CNI config is in `config:` field.