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Re: [v6ops] Thoughts on draft-yourtchenko-ra-dhcpv6-comparison

Lorenzo Colitti <lorenzo@google.com> Tue, 17 December 2013 01:05 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Tue, 17 Dec 2013 10:04:48 +0900
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To: Ole Troan <otroan@employees.org>
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Subject: Re: [v6ops] Thoughts on draft-yourtchenko-ra-dhcpv6-comparison
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On Mon, Dec 16, 2013 at 11:25 PM, Ole Troan <otroan@employees.org> wrote:

> I see the scaling properties on a multicast capable link very different
> between the two.
> take a multicast capable link with 10K nodes on it, where power has just
> come back.
> a few hundred RS/RA messages, at least 40K DHCPv6 messages.
>

True. On the other hand, on wifi, multicast is expensive, both in terms of
shared channel bandwidth and in terms of impact on device battery life if
solicited RAs are sent to all-nodes multicast. Of course, you can avoid
this by sending solicited RAs unicast.

In the grand scheme of things I think these link-layer concerns are not the
most important factors here. That said, if they're not controversial, then
perhaps it's good to document them.

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