Re: [Roll] John Scudder's Discuss on draft-ietf-roll-aodv-rpl-10: (with DISCUSS and COMMENT)

Alvaro Retana <aretana.ietf@gmail.com> Tue, 20 April 2021 15:23 UTC

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From: Alvaro Retana <aretana.ietf@gmail.com>
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To: John Scudder <jgs@juniper.net>
Cc: "draft-ietf-roll-aodv-rpl@ietf.org" <draft-ietf-roll-aodv-rpl@ietf.org>, "roll@ietf.org" <roll@ietf.org>, "roll-chairs@ietf.org" <roll-chairs@ietf.org>, The IESG <iesg@ietf.org>, Ines Robles <mariainesrobles@googlemail.com>
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Subject: Re: [Roll] John Scudder's Discuss on draft-ietf-roll-aodv-rpl-10: (with DISCUSS and COMMENT)
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ACK. (For the record)



On April 20, 2021 at 11:09:05 AM, John Scudder (jgs@juniper.net) wrote:

Hi Alvaro,

I have one partial reply below, but I think we might benefit from a short
phone call. I’ll unicast you some times that would work for me.

On Apr 20, 2021, at 10:55 AM, Alvaro Retana <aretana.ietf@gmail.com> wrote:

...

Further, it’s not stated anywhere whether AODV-RPL is intended to stand
alone as its own routing protocol, or to be viewed as an extension of RPL.
In the former case, it seems the document is lacking details that are
present
in RFC 6550. I’m assuming the latter is the case, but a clear statement to
that effect seems indicated.


AODV-RPL uses a new Mode of Operation (MOP) dedicated to the discovery
of p2p routes.  This means that it runs in a separate instance from
the "base RPL".  Also, it can be used whether or not a "base RPL"
instance is used.  IOW, it is RPL using MOP 5.


This doesn’t really clear up my concern, which I can rephrase this way: I’m
pretty sure AODV-RPL, standing alone, isn’t an implementable specification.
If it assumes that all the protocol machinery of RFC 6550 is present, then
I’m willing to accept on faith that the gaps are filled that way, but this
needs to be said. If it * doesn’t* assume that all of RFC 6550 is present,
then I think it should call out by reference what the required parts are.

I haven’t tried to go through the document and say “this isn’t
implementable because you left out this, and that, and so on” because so
far my guess is it’s assumed that the entire base of RFC 6550 is available,
so it wouldn’t be a good use of anyone’s time to produce that kind of
review.

—John