netdev - Re: [PATCH v2] bonding: check if clients MAC addr has changed

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Date:	Wed, 30 Jun 2010 13:52:49 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	fleitner@...hat.com
Cc:	bonding-devel@...ts.sourceforge.net, fubar@...ibm.com,
	netdev@...r.kernel.org, gospo@...hat.com
Subject: Re: [PATCH v2] bonding: check if clients MAC addr has changed

From: Flavio Leitner <fleitner@...hat.com>
Date: Tue, 29 Jun 2010 15:24:39 -0300

> When two systems using bonding devices in adaptive load
> balancing (ALB) communicates with each other, an endless
> ping-pong of ARP replies starts between these two systems.
> 
> What happens? In the ALB mode, bonding driver keeps track
> of each client connected in a hash table, so it can do the
> receive load balancing (RLB). This hash table is updated
> when an ARP reply is received, then it scans for the client
> entry, updates its MAC address and flag it to be announced
> later. Therefore, two seconds later, the alb monitor runs
> and send for each updated client entry two ARP replies
> updating this specific client. The same process happens on
> the receiving system, causing the endless ping-pong of arp
> replies.
> 
> See more information including the relevant functions below:
 ...
> Signed-off-by: Flavio Leitner <fleitner@...hat.com>
> Signed-off-by: Jay Vosburgh <fubar@...ibm.com>

Applied, thanks.

Probably one of the best networking commit log messages I've seen in a
long time.  Nice work.
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