Subject: [icnrg] review, Path Steering in CCNx and NDN

From: Rute Sofia <[email-masked]>
Date: Mon, 11 May 2020 15:24:15 +0000

Hello Ilya, David,

so here is a review for https://datatracker.ietf.org/doc/draft-oran-icnrg-pathsteering/?include_text=1.

The draft is quite clear given that it has as basis an ACM ICN (2017) paper. Some suggestions :

-          If possible, Figure 1 should be revised, as ideally the reader should understand the difference when applying this specific proposal of path steering (where, since a first Interest packet follows a path, all subsequent ones directed to the same object/session will do the same)...The figure on the paper is similar, so a suggestion would be to have a fig exemplifying what would happen in forwarder 2, if the conditions in between Interest 1 and Interest 2 would change (for path discovery in ICN vs path steering).

-          Even though you state that the paper should be a normative reference, the fact is that the reader may or may not read the paper. Therefore, IMO it would be good to have up front a list of definitions (end to end path discovery, path label, etc).

-          Applicability. A summary for the applicability of path steering is provided in the intro (accurate measurement; monitoring and discovery of multipath). However, the draft would benefit from a section on specific applicability aspects, beyond measurement, and also considering application of ICN on wireless environments IMO.

And an additional question:

-          This specific proposal for path steering builds the path for a session/chunks of an object) based on the first Interest packet for that specific object, correct? Would it be possible/make sense to debate on an approach which would consider a set of first Interest packets, i.e., so that the path would be built on a "best" path instead of on a "first" path?

BR,

Rute Sofia

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