bonding: doc: some details on backup slave arp validation

Add some details to bonding documentation on how backup slave arp
validation works.

Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt
index e7454fcc9176..adee3b4a75cb 100644
--- a/Documentation/networking/bonding.txt
+++ b/Documentation/networking/bonding.txt
@@ -303,6 +303,12 @@ arp_validate
         such a situation, validation of backup slaves must be
         disabled.
 
+        The validation of ARP requests on backup slaves is mainly
+        helping bonding to decide which slaves are more likely to
+        work in case of the active slave failure, it doesn't really
+        guarantee that the backup slave will work if it's selected
+        as the next active slave.
+
         This option is useful in network configurations in which
         multiple bonding hosts are concurrently issuing ARPs to one or
         more targets beyond a common switch.  Should the link between