Re: [Ice] I-D Action: draft-ietf-ice-trickle-20.txt

Hi Peter,

Don't know whether it is relevant to this issue, but on the previous version I commented that the procedures in section 5.1.3 of 5245bis is about eliminating candidates - not pairs. However, the text in draft-trickle still talks about pairs.

Regards,

Christer

-----Original Message-----
From: Ice [mailto:ice-bounces@ietf.org] On Behalf Of Peter Saint-Andre
Sent: 11 April 2018 23:28
To: ice@ietf.org
Subject: Re: [Ice] I-D Action: draft-ietf-ice-trickle-20.txt

Ekr and I looked at the peer reflexive text and found two things that are easily fixed with some wordsmithing:

* In §11, the order of points 4 and 5 could be interpreted to mean that a Trickle ICE agent aapplies the redundancy checking rules from 5245bis and only then applies the rule in point 5 about pairs with peer reflexive candidates.

* Also in §11 (and §10 too), point 6 says:

   6.  If after the relevant redundancy tests the check list where the
       pair is to be added already contains the maximum number of
       candidate pairs (100 by default as per [rfc5245bis]), the agent
       SHOULD discard any pairs in the Failed state to make room for the
       new pair.  If there are no such pairs, the agent SHOULD discard
       the new pair.

Discarding the new pair is not consistent with §6.1.2.5 of 5245bis; instead, we should discard lower-priority pairs to prune things down to the maximum number of candidate pairs.

Peter

On 4/9/18 5:43 PM, Peter Saint-Andre wrote:
> Some further edits along the lines discussed on list...
> 
> On 4/9/18 5:42 PM, internet-drafts@ietf.org wrote:
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>> This draft is a work item of the Interactive Connectivity Establishment WG of the IETF.
>>
>>         Title           : Trickle ICE: Incremental Provisioning of Candidates for the Interactive Connectivity Establishment (ICE) Protocol
>>         Authors         : Emil Ivov
>>                           Eric Rescorla
>>                           Justin Uberti
>>                           Peter Saint-Andre
>> 	Filename        : draft-ietf-ice-trickle-20.txt
>> 	Pages           : 33
>> 	Date            : 2018-04-09
>>
>> Abstract:
>>    This document describes "Trickle ICE", an extension to the
>>    Interactive Connectivity Establishment (ICE) protocol that enables
>>    ICE agents to begin connectivity checks while they are still
>>    gathering candidates, by incrementally exchanging candidates over
>>    time instead of all at once.  This method can considerably accelerate
>>    the process of establishing a communication session.
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-ietf-ice-trickle/
>>
>> There are also htmlized versions available at:
>> https://tools.ietf.org/html/draft-ietf-ice-trickle-20
>> https://datatracker.ietf.org/doc/html/draft-ietf-ice-trickle-20
>>
>> A diff from the previous version is available at:
>> https://www.ietf.org/rfcdiff?url2=draft-ietf-ice-trickle-20
>>
>>
>> Please note that it may take a couple of minutes from the time of 
>> submission until the htmlized version and diff are available at tools.ietf.org.
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
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