Re: [clue] Mirja Kühlewind's Discuss on draft-ietf-clue-protocol-17: (with DISCUSS and COMMENT)

Hi Mirja,
Thanks for the review.
The protocol document describes the clue protocol. The establishment of the data channel is discussed in the signaling protocol  https://tools.ietf.org/html/draft-ietf-clue-signaling-14 

The introduction says

CLUE-capable endpoints are connected by means of the CLUE data
   channel, an SCTP over DTLS channel which is opened and established as
   described in [I-D.ietf-clue-signaling] and
   [I-D.ietf-clue-datachannel].  CLUE protocol messages flowing over
   such a channel are detailed in this document, both syntactically and
   semantically.

Roni Even

-----Original Message-----
From: clue [mailto:clue-bounces@ietf.org] On Behalf Of Mirja Kühlewind
Sent: Thursday, November 01, 2018 2:32 AM
To: The IESG
Cc: clue-chairs@ietf.org; clue@ietf.org; draft-ietf-clue-protocol@ietf.org
Subject: [clue] Mirja Kühlewind's Discuss on draft-ietf-clue-protocol-17: (with DISCUSS and COMMENT)

Mirja Kühlewind has entered the following ballot position for
draft-ietf-clue-protocol-17: Discuss

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DISCUSS:
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This document does not discuss any interactions with the transport protocol (e.g. who establishes the connection? what happens if the connections breaks; who should re-establish?). Also, I assume that SCTP is used (instead of TCP) because the idea is to use different SCTP streams for the different directions of the communication...? However, this is a complete guess, as the document does unfortunately not say nothing about the mapping of CLUE messages to SCTP sessions. In case all message are assumed to be send over the same stream instead, why is SCTP used and not TCP? Please provide more information and guidance on the use of SCTP!

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COMMENT:
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Two minor editorial commets:

1) In the terminology section: What does MCU actually stand for?

2) sec 4:
"CLUE protocol version numbers are
   characterized by a major version number (single digit) and a minor
   version number (single digit)..."
However, later on the text says that the numbers can also consist of multiple digits...

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