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-rw-r--r--Documentation/networking/ip-sysctl.rst9
1 files changed, 6 insertions, 3 deletions
diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index 2b329042b38c..b31601405c54 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -1633,12 +1633,15 @@ arp_notify - BOOLEAN
or hardware address changes.
== ==========================================================
-arp_accept - BOOLEAN
- Define behavior for gratuitous ARP frames who's IP is not
- already present in the ARP table:
+arp_accept - INTEGER
+ Define behavior for accepting gratuitous ARP (garp) frames from devices
+ that are not already present in the ARP table:
- 0 - don't create new entries in the ARP table
- 1 - create new entries in the ARP table
+ - 2 - create new entries only if the source IP address is in the same
+ subnet as an address configured on the interface that received the
+ garp message.
Both replies and requests type gratuitous arp will trigger the
ARP table to be updated, if this setting is on.