1 files changed, 3 insertions, 1 deletions

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 2193a5d124c5..d99940dcfc44 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -11,7 +11,9 @@ ip_forward - BOOLEAN
         for routers)
 
 ip_default_ttl - INTEGER
-        default 64
+        Default value of TTL field (Time To Live) for outgoing (but not
+        forwarded) IP packets. Should be between 1 and 255 inclusive.
+        Default: 64 (as recommended by RFC1700)
 
 ip_no_pmtu_disc - BOOLEAN
         Disable Path MTU Discovery.