docs: Add neigh/gc_thresh3 and route/max_size documentation.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index c7165f4cb792..fe95105992c5 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -20,6 +20,15 @@ ip_no_pmtu_disc - BOOLEAN
 min_pmtu - INTEGER
         default 562 - minimum discovered Path MTU
 
+route/max_size - INTEGER
+        Maximum number of routes allowed in the kernel.  Increase
+        this when using large numbers of interfaces and/or routes.
+
+neigh/default/gc_thresh3 - INTEGER
+        Maximum number of neighbor entries allowed.  Increase this
+        when using large numbers of interfaces and when communicating
+        with large numbers of directly-connected peers.
+
 mtu_expires - INTEGER
         Time, in seconds, that cached PMTU information is kept.