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Re: [tram] TURN server discovery (please discuss!)

"Prashanth Patil (praspati)" <praspati@cisco.com> Thu, 20 March 2014 14:48 UTC

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From: "Prashanth Patil (praspati)" <praspati@cisco.com>
To: Simon Perreault <simon.perreault@viagenie.ca>, "tram@ietf.org" <tram@ietf.org>
Thread-Topic: [tram] TURN server discovery (please discuss!)
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Date: Thu, 20 Mar 2014 14:48:02 +0000
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Subject: Re: [tram] TURN server discovery (please discuss!)
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On 3/20/14 7:21 PM, "Simon Perreault" <simon.perreault@viagenie.ca> wrote:

>Tramsters,
>
>During the meeting in London there was a mixed reaction to the
>presentation of draft-patil-tram-turn-serv-disc-00. We heard very few
>hums both for and against adoption.
>
>As a reminder, here is the related milestone:
>
>Sep 2014 - Send new TURN server discovery mechanism for enterprises and
>ISPs to IESG for publication as Proposed Standard
>
>I'd like people to respond to this email explaining their position
>regarding the presented solution. Why do you (not) support it? What is
>missing? What would be a good solution in your opinion? It seems we did
>not have time to fully discuss those questions face-to-face, so let's do
>it here.
>
>Basically, the draft proposes two mechanisms: DHCP and anycast. We know
>each of these solutions has drawbacks which were well discussed. The
>question is: are they deal breakers, or could we live with them?

The first mechanism is actually Service Resolution. The draft suggests
DHCP as the primary means to obtain a domain name which can be used for
service resolution. There was a suggestion that domain name could also be
extracted from own SIP/XMPP/email identity
(http://www.ietf.org/mail-archive/web/tram/current/msg00156.html)- which
we plan to add to the draft in the next version.

-Prashanth


>
>WPAD was also discussed. The main issue seems to be that WPAD is not
>really standardized anywhere. IMHO this issue can be worked around if
>the solution is good technically. So, how is it technically? Would it
>work? What are the drawbacks? I don't think this has been discussed
>enough.
>
>Martin Stiemerling proposed that we look at draft-kist-alto-3pdisc for
>inspiration. As I understand it, that solution relies on the client's IP
>address "owner" (e.g. the ISP or enterprise) to populate the DNS reverse
>zone (i.e., in-addr.arpa or ip6.arpa) with appropriate NAPTR records
>pointing to the network-provided TURN server. Can this work? This is a
>new idea for which I have not seen any discussion yet.
>
>Let's solve this!
>
>Thanks,
>Simon
>-- 
>DTN made easy, lean, and smart --> http://postellation.viagenie.ca
>NAT64/DNS64 open-source        --> http://ecdysis.viagenie.ca
>STUN/TURN server               --> http://numb.viagenie.ca
>
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