Subject: [MMUSIC] Re: ICE - When to send the SIP ACK message?

From: Jonathan Rosenberg <[email-masked]>
Date: Wed, 14 Jun 2006 22:17:11 -0400

RFC 3261 defines when to send ACK, and its sent on receipt of the 200 
OK. ICE doesn't change this, and its not clear to me why it would make 
any sense to do so.

Indeed I'd go so far as to say that it would be a mistake for the ICE 
spec to go and reconfirm the various things that are standardized and 
not changed by ICE....

Thanks,
Jonathan R.

Philip Matthews wrote:

> Jonathan:
> 
> In internal discussions on the use of ICE with SIP,
> the question of when to send the SIP ACK message came up.
> Assuming the Offer is contained in the SIP INVITE message
> and the Answer is contained in the 200 OK message,
> then should the Offerer wait to send the ACK until the connectivity
> checks complete or should it be sent immediately?
> 
> I couldn't find anything about this in the ICE spec.
> 
> My sense is that the right thing to do is to send the ACK immediately,
> since the connectivity checks may take some time to complete.
> Do you agree?
> Perhaps it would be worthwhile adding some words about this
> to the ICE spec?
> 
> - Philip
> 

-- 
Jonathan D. Rosenberg, Ph.D.                   600 Lanidex Plaza
Cisco Fellow                                   Parsippany, NJ 07054-2711
Cisco Systems
[email-masked]                              FAX:   (973) 952-5050
http://www.jdrosen.net                         PHONE: (973) 952-5000
http://www.cisco.com

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