From 721d7a15a87df48449f77241c45ad06a5570ba51 Mon Sep 17 00:00:00 2001
From: Timo Teras <timo.teras@iki.fi>
Date: Mon, 29 Dec 2008 17:12:53 +0200
Subject: mtu: a bit more informative usage()

---
 mtu.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'mtu.c')

diff --git a/mtu.c b/mtu.c
index 1ef1bce..8e03c07 100644
--- a/mtu.c
+++ b/mtu.c
@@ -20,7 +20,13 @@ static void usage(void)
 		"usage: mtu -i <mtu-size> <host>\n"
 		"       mtu -I <host>\n"
 		"       mtu -d <host>\n"
-		"       mtu -D <host>\n");
+		"       mtu -D <host>\n"
+		"\n"
+		" -i <mtu-size>   Inject <mtu-size> as PMTU to <host>\n"
+		" -I              Inject local PMTU as PMTU to <host>\n"
+		" -d              Discover PMTU to <host>\n"
+		" -D              Discover PMTU to <host> and assign it to interface MTU\n"
+		"\n");
 	exit(3);
 }
 
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