1 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 87bbd774c2b2..88efed0a533f 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -789,6 +789,12 @@ mtu - INTEGER
         Default Maximum Transfer Unit
         Default: 1280 (IPv6 required minimum)
 
+router_probe_interval - INTEGER
+        Minimum interval (in seconds) between Router Probing described
+        in RFC4191.
+
+        Default: 60
+
 router_solicitation_delay - INTEGER
         Number of seconds to wait after interface is brought up
         before sending Router Solicitations.