From 22f1ea467ef944c512d9be2e18d1352eb314b01b Mon Sep 17 00:00:00 2001
From: Vincent Bernat <bernat@luffy.cx>
Date: Fri, 12 Jul 2013 00:44:56 +0200
Subject: [PATCH] README: show how to use tcpdump for troubleshooting

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index cff76216..f2656e3e 100644
--- a/README.md
+++ b/README.md
@@ -188,6 +188,14 @@ To embed lldpd into an existing system, there are two point of entries:
     should always be shipped with `lldpd`. On the other hand, programs
     using `liblldpctl.so` can rely on the classic ABI rules.
 
+Troubleshooting
+---------------
+
+You can use `tcpdump` to look after the packets received and send by
+`lldpd`. To look after LLDPU, use:
+
+    tcpdump -s0 -vv -pni eth0 ether dst 01:80:c2:00:00:0e
+
 License
 -------
 
-- 
2.39.5