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Re: [v6ops] draft-ietf-6man-grand : saving lookups

Lorenzo Colitti <lorenzo@google.com> Wed, 12 August 2020 14:10 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Wed, 12 Aug 2020 23:09:46 +0900
Message-ID: <CAKD1Yr15zxUkxUfsKWewJgv=pvvQFuQWg4ib4L0ceDUy-nTEoA@mail.gmail.com>
To: Jen Linkova <furry13@gmail.com>
Cc: Philip Homburg <pch-v6ops-9@u-1.phicoh.com>, V6 Ops List <v6ops@ietf.org>, 6man <ipv6@ietf.org>
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Subject: Re: [v6ops] draft-ietf-6man-grand : saving lookups
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On Wed, Aug 12, 2020 at 12:55 PM Jen Linkova <furry13@gmail.com> wrote:

> > 2) I think MAY is too weak to rely on. One possibility to deal with 1)
> >    and 2) is to have an RA option that specifies the interval. Then we
> >    can make sending the NAs if the option is present a SHOULD or MUST
>
> I'm not convinced we shall be doing it in the first place ;) And MUST
> or even SHOULD look like a very strong requirement on all hosts just
> to cover the very special case of sleeping devices.
>

+1 to not doing this, because some of those "sleeping devices" might also
be routers (e.g., a phone that is sharing the wifi connection). Per spec,
any packet to ff02::2 will reach and potentially wake up those devices. If
these packets become common, the devices will be forced to choose between
a) bad battery life and b) violating the spec (or at least nullifying its
utility) by dropping the packets.

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