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

Ole Troan <otroan@employees.org> Tue, 21 July 2015 10:46 UTC

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From: Ole Troan <otroan@employees.org>
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Date: Tue, 21 Jul 2015 12:47:11 +0200
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To: Erik Nordmark <nordmark@acm.org>
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Subject: Re: [v6ops] new draft: draft-yc-v6ops-solicited-ra-unicast
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> But in terms of implementation, isn't it simpler to always(*) respond to a RS with a unicast RA?
> As background, the text in RFC4861 comes from the old concern that all devices might boot at the same time when the power is re-established after a building power failure; that doesn't happen since most devices (laptops, smartphones, IoT devices) have batteries today. In that case it might have made sense to sending fewer RA messages by using multicast.

in addition to Mark’s points.
 - what happens when the router reboots, will not all the hosts then try to actively reconnect?
   that router could server thousands of users.
 - while this is intended for WIFI networks, in common deployments the WIFI interface is not integrated in the router. for the router’s perspective this just looks like another wired interface. either this has to be made configurable and not the default, or considerations of large flat wired L2 networks must also be considered.

cheers,
Ole