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>

diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt
index e7454fcc91763549253c0c3daaf5edf872c73a99..adee3b4a75cb75664a6779fbce2df98d051d30f5 100644 (file)
--- 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