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

Ole Troan <otroan@employees.org> Thu, 16 July 2015 09:01 UTC

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From: Ole Troan <otroan@employees.org>
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Date: Thu, 16 Jul 2015 11:01:02 +0200
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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>
To: "Fred Baker (fred)" <fred@cisco.com>
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Cc: "draft-yc-v6ops-solicited-ra-unicast@tools.ietf.org" <draft-yc-v6ops-solicited-ra-unicast@tools.ietf.org>, v6ops list <v6ops@ietf.org>
Subject: Re: [v6ops] new draft: draft-yc-v6ops-solicited-ra-unicast
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>> I think this means that unicasting solicited RAs on certain link types
>> would usefully reduce multicasts. It does raise the question as to why
>> solicited RAs were multicast in the first place.
> 
> Not sure. RFC 826, which is the obvious predecessor, calls for the response to an ARP request to be unicast.

I believe it was thought of as an optimisation.

cheers,
Ole