Re: [Gen-art] Genart last call review of draft-ietf-ice-rfc5245bis-16

Christer Holmberg <christer.holmberg@ericsson.com> Sun, 28 January 2018 13:28 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Stewart Bryant <stewart.bryant@gmail.com>, "gen-art@ietf.org" <gen-art@ietf.org>
CC: "draft-ietf-ice-rfc5245bis.all@ietf.org" <draft-ietf-ice-rfc5245bis.all@ietf.org>, "ietf@ietf.org" <ietf@ietf.org>, "ice@ietf.org" <ice@ietf.org>
Thread-Topic: Genart last call review of draft-ietf-ice-rfc5245bis-16
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Date: Sun, 28 Jan 2018 13:28:37 +0000
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Subject: Re: [Gen-art] Genart last call review of draft-ietf-ice-rfc5245bis-16
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Hi Steward,

Please see inline.

> ---
>
>> SB> You introduce Ta, but it would be so much kinder to the reader to 
>> SB> give it a real name.
> Ta was defined in RFC 5245, and it's commonly used in ICE-related 
> discussions, so I think it would cause confusion to change the name at 
> this point.
>
> I understand. Maybe some words to explain it a little. Perhaps "the foo timer known in this technology as Ta" of something similar.
>
>>> You say "Let HTO" again a user friendly name would be helpful to the 
>>> new reader
>> The name was provided by transport people that provided text. As it¹s 
>> similar to RTO, I¹d like to keep it.
>
> I see what you are doing. You could however give it a name and say known as HTO. A name just makes it easier to remember what it does.

First, I am not sure which generic timer Ta could be associated with. Ta is very ICE specific, as it controls the STUN/TURN transactions. 

Section 5.1.1.2 says:

   "The gathering process is controlled using a timer, Ta.  Every time Ta
   expires, the agent can generate another new STUN or TURN transaction."

Would it help if I added the timer descriptions to the Terminology section? Something like:

Timer Ta:	The timer for generating new STUN or TURN transactions.
Timer RTO:	The retransmission timer for a given STUN or TURN transaction.
Timer HTO:	The timeout timer for a given STUN or TURN transaction.	

---

>>> Appendix B is great, particularly from section B5 onwards. It would 
>>> be great to forward reference this to help the reader understand the 
>>> normative text earlier in the document.
>> Any particular place where you would like to have the reference? In the Introduction?
> Yes a heads up to to Appendix in the Intro would be useful, the a pointer to the specific section 
> when you first introduce a parameter doing something in the protocol.

What about adding the following new paragraph to the end of the Introduction.

"[REF-to-Appendix-B] provide background information and motivations regarding the design
decisions that were made when designing ICE."

Regards,

Christer