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

Lorenzo Colitti <lorenzo@google.com> Mon, 20 July 2015 16:35 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Mon, 20 Jul 2015 18:35:21 +0200
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To: Erik Kline <ek@google.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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On Fri, Jul 17, 2015 at 9:59 AM, Erik Kline <ek@google.com>; wrote:

> I'd leave it at roughly:
>
>     - multicast RA at least once every max_ra is still a MUST (iirc)
>

Do we need to repeat this? It should already be clearly stated by RFC 4862.


>     - unicast RAs MAY be sent at any time, whether solicited or not
>

What's the use case for a unicast unsolicited RA? They can only reach nodes
for which the router knows the IPv6 addresses, and so pretty much require
that routers keep a lot of state.

    - unicast RAs SHOULD be considered for link layers where this
> helps efficiency
>

I think we also need to provide a clear recommendation to do this on common
types of links where this is beneficial, i.e., Wi-Fi.