[PATCH 3/4] doc: networking: document arp_evict_nocarrier

[James Prestwood <prestwoj@gmail.com>]

Signed-off-by: James Prestwood <prestwoj@gmail.com>
---
 Documentation/networking/ip-sysctl.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/networking/ip-sysctl.rst b/Documentation/networking/ip-sysctl.rst
index c2ecc9894fd0..174d9d3ee5c2 100644
--- a/Documentation/networking/ip-sysctl.rst
+++ b/Documentation/networking/ip-sysctl.rst
@@ -1565,6 +1565,15 @@ arp_accept - BOOLEAN
 	gratuitous arp frame, the arp table will be updated regardless
 	if this setting is on or off.
 
+arp_evict_nocarrier - BOOLEAN
+	Clears the ARP cache on NOCARRIER events. This option is important for
+	wireless devices where the ARP cache should not be cleared when roaming
+	between access points on the same network. In most cases this should
+	remain as the default (1).
+
+	- 1 - (default): Clear the ARP cache on NOCARRIER events
+	- 0 - Do not clear ARP cache on NOCARRIER events
+
 mcast_solicit - INTEGER
 	The maximum number of multicast probes in INCOMPLETE state,
 	when the associated hardware address is unknown.  Defaults
-- 
2.31.1