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From: Dino Farinacci <farinacci@gmail.com>
In-Reply-To: <AS4PR01MB91814DD1C86353D50E598E2F891A9@AS4PR01MB9181.eurprd01.prod.exchangelabs.com>
Date: Fri, 25 Mar 2022 12:34:33 -0700
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To: HAINDL Bernhard <Bernhard.HAINDL@frequentis.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/lisp/KI7KvPy6bM-h1OSdCQP-CP9u9Yo>
Subject: Re: [lisp] Request to LISP working group for GB-LISP ATN use cases
 to facilitate its adoption in ICAO.
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> After a few aisle conversations following Tuesday=E2=80=99s GB-LISP =
presentation, here is a revised list of asks to the LISP WG:

I was going to summarize your asks after hearing them this week. But I'm =
glad you beat me to it and refined them a bit. See comments inline.

> =E2=80=A2        Bring RFC 6830 and RFC 6833 to Standard Track =
(pending since more than 400 days).

Yes, we are working hard on these. And now its a process issue out of =
the hands of the working group. I believe the chairs are keeping close =
watch on this.

But I think you can count on them being standards. The question is when.

> o   The aviation community needs standards for LISP Control and Data =
plane protocols. The lack of these standards is currently a major risk =
for GB-LISP

Your message was clear about that and we will do whatever we can to get =
you there.

> =E2=80=A2        =E2=80=9CPublish/Subscribe Functionality for LISP=E2=80=
=9D - > Move from Experimental to Standards Track

I support this request. I have an implemenation of the latest PubSub and =
put in specific features for the ATN use case.

> o   More details on some pubsub operations =E2=80=93 what happens with =
subscription after deregistration, explicit selective unsubscription, =
wildcard subscription and unsubscription

Well since the subscription state is stored in the map-server for the =
registration, when the registration goes away there will be no more =
Map-Notifies going to the subscribers. Except for the last one when the =
RLOC-set goes from its current state to an empty RLOC-set (since the =
deregistration indicates to remove the entire EID entry).

What do you mean by your last two points "explicit selective =
unsubscription" and "wildcard =E2=80=A6". Are you asking what happens to =
these subscription types when a deregitration occurs?

> =E2=80=A2        Include network mobility features to =
draft-ietf-lisp-eid-mobility
> o   Add network mobility support =E2=80=93 flag network prefixes as =
fixed or mobile to automatic remove all longer sub-prefixes inside the =
mapping system

I know two implementations that already do this. Maybe we haven't =
spec'ed it well, please confirm. But when a host EID is dynamically =
learned, the xTR can be configured to register a network prefix instead =
of the host EID.

> =E2=80=A2        Transport more information inside LISP
> o   4D trajectory snapshot =3D timestamp (in seconds) + aircraft 3D =
coordinates
> o   Digital signature from the aircraft for the AGMI Request message
> o   =E2=80=9CSuggest=E2=80=9D messages on foreign report received =
instead of direct deregistration of a foreign link -> =E2=80=9CSolicit =
Deregistration=E2=80=9D

Look at the functionality that draft-kowal-lisp-policy-distribution-02 =
is spec'ing. Using JSON-formatted RLOC encodings, you can encode the =
attributes you list above. We can do digital signatures for Map-Requests =
and Map-Registers. Did you need it for another LISP packet type?

Please explain your last bullet in more detail so we can get a better =
understanding about the functionality you are requesting.

Thanks for sending this email,
Dino




