netdev - Re: possible bug in IPv6 MLD retransmissions

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Date:	Wed, 22 May 2013 07:30:39 -0400
From:	David Stevens <dlstevens@...ibm.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	netdev-owner@...r.kernel.org,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Subject: Re: possible bug in IPv6 MLD retransmissions

First, I wouldn't call this a "bug"; it is listed as a "SHOULD", not a 
"MUST",  so
it is not required for compliance, though it is a good feature to add.

Second, I think doing this on all LL addresses unconditionally isn't a 
good
idea. If some configuration is using thousands of LL addrs for reasons of 
their
own, they would suddenly be blasted with unexpected MLD reports where
they have none now. I don't see why tracking it would be such a problem --
if nothing else, you could simply add a counter for the number of valid LL 
addrs
incremented on DAD completion, and send these whenever it transitions from 
0 to 1.

                                                +-DLS

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