[Sip] Question on RFC 3264 Offer/Answer Model

["George Foti" <george.foti at ericsson.com>]

X-Original-To: sip-archive at optimus.ietf.org
Delivered-To: ietfarch-sip-archive at core3.amsl.com
Received: from [127.0.0.1] (localhost [127.0.0.1])
	by core3.amsl.com (Postfix) with ESMTP id DECD33A6B67;
	Tue, 30 Sep 2008 08:46:30 -0700 (PDT)
X-Original-To: sip at core3.amsl.com
Delivered-To: sip at core3.amsl.com
Received: from localhost (localhost [127.0.0.1])
	by core3.amsl.com (Postfix) with ESMTP id D574A28C0F0
	for

; Tue, 30 Sep 2008 08:46:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.109 X-Spam-Level: X-Spam-Status: No, score=-5.109 tagged_above=-999 required=5 tests=[BAYES_05=-1.11, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id g+9780iTYaBt for ; Tue, 30 Sep 2008 08:46:27 -0700 (PDT) Received: from imr1.ericy.com (imr1.ericy.com [198.24.6.9]) by core3.amsl.com (Postfix) with ESMTP id 067513A6B92 for ; Tue, 30 Sep 2008 08:46:17 -0700 (PDT) Received: from eusrcmw750.eamcs.ericsson.se (eusrcmw750.exu.ericsson.se [138.85.77.50]) by imr1.ericy.com (8.13.1/8.13.1) with ESMTP id m8UFkxPo021919; Tue, 30 Sep 2008 10:46:59 -0500 Received: from ecamlmw720.eamcs.ericsson.se ([142.133.1.72]) by eusrcmw750.eamcs.ericsson.se with Microsoft SMTPSVC(6.0.3790.1830); Tue, 30 Sep 2008 10:46:37 -0500 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Date: Tue, 30 Sep 2008 11:46:32 -0400 Message-ID: <73FA090C1F1E6A40B4F565A28D8C71220A9D64C5 at ecamlmw720.eamcs.ericsson.se> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Question on RFC 3264 Offer/Answer Model thread-index: AckjE7ZyMJpmTJevTTqpqYRLeya5QA=From: "George Foti" To: , "Jonathan Rosenberg" X-OriginalArrivalTime: 30 Sep 2008 15:46:37.0765 (UTC) FILETIME=[B957A750:01C92313] Subject: [Sip] Question on RFC 3264 Offer/Answer Model X-BeenThere: sip at ietf.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: Session Initiation Protocol List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="==============90624967==" Sender: sip-bounces at ietf.org Errors-To: sip-bounces at ietf.org This is a multi-part message in MIME format.

Title: Question on RFC 3264 Offer/Answer Model

Hi,

I have a question on the subject RFC in particular when it relates to multicast streams.
In section 6.2 on Multicast streams, the following is a quotation from the RFC:

The set of media formats in the answer MUST be equal to or be a subset of those in the offer. Removing a format is a way for the answerer to indicate that the format is not supported. The ptime and bandwidth attributes in the answer MUST equal the ones in the offer, if present. If not present, a non-zero ptime MAY be added to the answer.

My question relates to the silence in regard what happens in the answer if the bandwidth is absent from the offer.
Can the answer include a bandwidth.

I appreciate a clarification in that regard.

George Foti
Ericsson Canada

_______________________________________________
Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors at cs.columbia.edu for questions on current sip
Use sipping at ietf.org for new developments on the application of sip