From 3f8e2795fcb8a0fcdff71c227a5957ff4dfa4af9 Mon Sep 17 00:00:00 2001
From: fengbojiang <fengbojiang@tencent.com>
Date: Tue, 27 Oct 2020 22:45:06 +0800
Subject: [PATCH] Add doc of `ndp` tool.

---
 tools/README.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tools/README.md b/tools/README.md
index 2ee3a6701..1019e7a5a 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -263,6 +263,20 @@ Examples:
 |         |                    |                    |                    |                    |
 ```
 
+# ndp
+Usage:
+```
+ndp -C <f-stack proc_id> [-nt] hostname
+ndp -C <f-stack proc_id> [-nt] -a | -c | -p | -r | -H | -P | -R
+ndp -C <f-stack proc_id> [-nt] -A wait
+ndp -C <f-stack proc_id> [-nt] -d hostname
+ndp -C <f-stack proc_id> [-nt] -f filename
+ndp -C <f-stack proc_id> [-nt] -i interface [flags...]
+ndp -C <f-stack proc_id> [-nt] -I [interface|delete]
+ndp -C <f-stack proc_id> [-nt] -s nodename etheraddr [temp] [proxy]
+```
+For more details, see [Manual page](https://www.freebsd.org/cgi/man.cgi?ndp).
+
 # how to implement a custom tool for communicating with F-Stack process
 
 Add a new FF_MSG_TYPE in ff_msg.h: