[IPV4] ARP: Documentation for new arp_accept sysctl variable.

As John pointed out, I had not added documentation to describe the
arp_accpet sysctl that I posted in my last patch.  This patch adds
that documentation.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 35aed1c6dd9..651298ba019 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -619,6 +619,11 @@ arp_ignore - INTEGER
         The max value from conf/{all,interface}/arp_ignore is used
         when ARP request is received on the {interface}
 
+arp_accept - BOOLEAN
+        Define behavior when gratuitous arp replies are received:
+        0 - drop gratuitous arp frames
+        1 - accept gratuitous arp frames
+
 app_solicit - INTEGER
         The maximum number of probes to send to the user space ARP daemon
         via netlink before dropping back to multicast probes (see