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Re: [v6ops] new draft: draft-yc-v6ops-solicited-ra-unicast

Gert Doering <gert@space.net> Tue, 21 July 2015 09:48 UTC

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Date: Tue, 21 Jul 2015 11:48:11 +0200
From: Gert Doering <gert@space.net>
To: Lorenzo Colitti <lorenzo@google.com>
Message-ID: <20150721094811.GB90924@Space.Net>
References: <201507071147.t67Bl13m009348@irp-lnx1.cisco.com> <CAO42Z2x7mNFbB_w_+W+80pY+LeCAKXaOBXMmQvkcaMSWhwW60g@mail.gmail.com> <EF21B630-5D0A-415A-A93F-9058900CC80C@cisco.com> <CAO42Z2zAqMXhBZ2wa=q0wtHGhMpMWU9TSjfFyd2quiki9w0oSw@mail.gmail.com> <85CADAA2-8DF2-4A6B-812B-7A77081936F5@cisco.com> <CAO42Z2w3fOxGJHasKqYZRfGZ2u=7FnZBm+jgLtgDvfZ7HYW=iw@mail.gmail.com> <CAO42Z2z+DwOin23HQTysrZ9dNP924+LQ-vOExmJc_xZUEB4yCQ@mail.gmail.com> <228248C6-94FE-4C9C-A875-F732EFDC6601@cisco.com> <55AD3B64.5070400@acm.org> <CAKD1Yr1QD8QtR5AJ4vobkXW57RBYC-YK2qPokqk8t5UK4MuHcQ@mail.gmail.com>
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Cc: v6ops list <v6ops@ietf.org>, "draft-yc-v6ops-solicited-ra-unicast@tools.ietf.org" <draft-yc-v6ops-solicited-ra-unicast@tools.ietf.org>
Subject: Re: [v6ops] new draft: draft-yc-v6ops-solicited-ra-unicast
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Hi,

On Tue, Jul 21, 2015 at 11:35:49AM +0200, Lorenzo Colitti wrote:
> This sort of thing can still happen. If lots of devices join at once,
> (e.g., if something happens at a large-scale event when hundreds of people
> pull their phones out of their pockets and turn them on at the same time),
> it may well be cheaper for the network to send one multicast RA.

I've been told that on a *Wifi* network, multicast never comes cheap
(so in the end your AP might just turn the multicast RA into 
unicast-to-all-stations anyway).

So I find that particular argument less than convincing.

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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