Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt
Flemming Andreasen <fandreas@cisco.com> Thu, 14 March 2013 15:23 UTC
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Date: Thu, 14 Mar 2013 11:23:02 -0400
From: Flemming Andreasen <fandreas@cisco.com>
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Cc: Jonathan Lennox <jonathan@vidyo.com>, "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt
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On 3/14/13 11:19 AM, mohamed.boucadair@orange.com wrote: > Dear Flemming, > Apologies for not sending my comment earlier. I should read the draft > before but I didn't read it since a while. > It is unfair to ignore the messages exchanged in this thread which say > the text is confusing and it should be worked better. The wording > proposed by Jonathan is much better. > I respectfully disagree. What is unfair is that people do not read documents when they are WGLC'ed but still expect their comments to be addressed ~6 months later. As to the message below be specific please; exactly what is it that is unclear in the text below ? Thanks -- Flemming > Cheers, > Med > > ------------------------------------------------------------------------ > *De :* Flemming Andreasen [mailto:fandreas@cisco.com] > *Envoyé :* jeudi 14 mars 2013 15:35 > *À :* Jonathan Lennox; BOUCADAIR Mohamed OLNC/OLN > *Cc :* Andrew Allen; mmusic@ietf.org > *Objet :* Re: [MMUSIC] RE : I-D Action: > draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt > > A couple of points here related to the overall thread: > > 1) WGLC for this draft completed about 6 months ago with no > comments on the draft > (http://www.ietf.org/mail-archive/web/mmusic/current/msg09594.html) > The -01 version that was WGLC'ed stated the following: > <quote> > > The 'ccap' capability attribute is intended to > be used only when there is no other mechanism available for > negotiating alternative connection address information, such as when > the <nettype> is different among the alternative addresses. The > 'ccap' attribute MUST NOT be used in situations where an existing > mechanism (such as Interactive Connectivity Establishment (ICE) > [RFC5245]) can be used to select between different connection > addresses. > > </quote > > and there is what the current -04 states: > <quote> > > The 'ccap' capability attribute is intended to > be used only when there is no other mechanism available for > negotiating alternative connection address information, such as when > the <nettype> is different among the alternative addresses (e.g. > "IN" and "PSTN"). The 'ccap' attribute MUST NOT be used in > situations where an existing mechanism (such as Interactive > Connectivity Establishment (ICE) [RFC5245]) can be used to select > between different connection addresses (e.g. "IP4" and "IP6" or > different IP addresses within the same IP address family). > > </quote> > > The only difference is the addition of clarifying examples and > hence there is no change in operation here. > > 2) On January 25, Simo sent an e-mail to the list pointing out the > port issue and suggesting text to be added > (http://www.ietf.org/mail-archive/web/mmusic/current/msg10160.html) > To recap, the draft specifically does not define port negotiation > (but simply reuses the current port in accordance with general > capability negotiation operation). Since this doesn't work when > changing between IN and PSTN, exception text to use port 9 for > PSTN was added (again in accordance with previous discussion). One > comment was received, which was in favor of the proposal. > > > The comments brought up now are not identifying any new or severe > problems, but essentially amount to word-smithing requests. As a > Working Group chair, I am unsympathetic to such requests on a > document that is this far along and furthermore has external > dependencies. We go through a WGLC process for a reason, and > people need to review and make their comments at that time. > > Comments on new text or changes made since the WGLC completed are > of course reasonable. With that in mind, if anybody still has > comments on the -04 version, please let us know. > > Thanks > > -- Flemming (MMUSIC co-chair) > > > > > On 3/14/13 9:04 AM, Jonathan Lennox wrote: >> I suggest being more concrete about ccap's restrictions, that it can't be used to negotiate alternative IP addresses. We can then discuss only ICE, without precluding altc for the proprietary systems which want to use it. >> >> Thus, I suggest something like this (wordsmithing requested): >> >> The 'ccap' attribute MUST NOT be used to offer multiple addresses with the <nettype> "IN" (i.e., multiple Internet protocol addresses) in the same media stream. Interactive Connectivity Establishment (ICE) [RFC5245] can be used to allow a choice among multiple Internet addresses. The use of ICE with capability negotiation is described in section 3.7 of [RFC5939]. >> >> >> This text might also be useful (though it definitely needs editorial improvement): >> >> In principle, the attributes associated with ICE ought to be included only in configurations where each media stream has a connection address which matches one of the ICE candidates (i.e, for currently-defined candidate types, a configuration whose connection address has the <nettype> "IN"); otherwise, under the rules of ICE, an ICE mismatch will result. However, this ICE mismatch will in fact induce the desired behavior, causing the answerer to abort ICE processing and use the connection address; so this ICE mismatch is harmless, other than the inclusion of an "ice-mismatch" attribute in the SDP answer. >> >> >> On Mar 13, 2013, at 3:03 PM, Andrew Allen wrote: >> >>> The text in the draft was worked out with Jonathan Lennox who raised the initial concen about conflict with ICE. If Jonathan is ok with the revised proposal from Thomas then I am OK with it. >>> >>> Andrew >>> >>> ----- Original Message ----- >>> From:mohamed.boucadair@orange.com [mailto:mohamed.boucadair@orange.com] >>> Sent: Wednesday, March 13, 2013 01:38 PM Central Standard Time >>> To: Andrew Allen;thomas.stach@siemens-enterprise.com <thomas.stach@siemens-enterprise.com>;Simo.Veikkolainen@nokia.com <Simo.Veikkolainen@nokia.com>;mmusic@ietf.org <mmusic@ietf.org> >>> Subject: RE : [MMUSIC] RE : I-D Action: draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>> >>> Hi Andrew, >>> >>> This was also my understanding but it seems the current text opens the door to signal an IPv4 and IPv6 address. >>> >>> If it is not allowed, then the text should be clear. >>> >>> Cheers, >>> Med >>> >>> ________________________________________ >>> De : Andrew Allen [aallen@blackberry.com] >>> Date d'envoi : mercredi 13 mars 2013 19:37 >>> À : BOUCADAIR Mohamed OLNC/OLN;thomas.stach@siemens-enterprise.com;Simo.Veikkolainen@nokia.com;mmusic@ietf.org >>> Objet : Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>> >>> The main use of the CCAP parameter is to indicate the capability to use CS SDP and E.164 numbers as a connection address and is not intended for IPv4 vs IPv6 for which ICE is the IETF defined mechanism. >>> >>> >>> >>> ----- Original Message ----- >>> From:mohamed.boucadair@orange.com [mailto:mohamed.boucadair@orange.com] >>> Sent: Wednesday, March 13, 2013 01:32 PM Central Standard Time >>> To: Stach, Thomas<thomas.stach@siemens-enterprise.com>;Simo.Veikkolainen@nokia.com <Simo.Veikkolainen@nokia.com>;mmusic@ietf.org <mmusic@ietf.org> >>> Subject: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>> >>> Re-, >>> >>> The wording you propose is better as it explicits this behavior is about ICE and not something else. So, I'm fine with that wording if this is the intent of the authors. BTW, the altc draft already mentions that if altc and ccap are both supported, then both are offered. >>> >>> In fact, I stopped to track this draft since the Anaheim meeting when it seems the consensus of the wg was: ICE is to solution to signal an IPv4 and IPv6 address. The misc draft should specify ccap when distinct nettypes are in use. It seems that consensus is not anymore valid. >>> >>> The current text of ccap is under-specified if it is to be used to convey an IPv4 and IPv6 address. >>> >>> Cheers, >>> Med >>> >>> ________________________________________ >>> De : Stach, Thomas [thomas.stach@siemens-enterprise.com] >>> Date d'envoi : mercredi 13 mars 2013 19:17 >>> À : BOUCADAIR Mohamed OLNC/OLN;Simo.Veikkolainen@nokia.com;mmusic@ietf.org >>> Objet : AW: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>> >>> Mohammed, >>> >>> I think it is not acceptable to mention altc in the example. >>> If I recollect correctly, the intention of the text is to specify that ICE MUST be >>> preferred over 'ccap' for IPv4/v6 address negotiation. >>> >>> If we add 'altc' as another example it basically means that the proprietary 'altc' is preferred over 'ccap'. >>> I don't think that a standards track RFC should give the message that proprietary is preferred. >>> Based on this issue I think the current text in the draft does not work. >>> I would explicitly mention the relation of ICE and 'ccap'. >>> The relation to other mechanism such as 'altc' needs to be treated in hte specification of that mechanism. >>> >>> Thus I propose to rephrase to: >>> >>> If an offerer has implemented Interactive Connectivity Establishment (ICE) [RFC5245] and >>> the 'ccap' attribute it MUST use ICE to select between different connection addresses >>> (e.g. "IP4" and "IP6" or different IP addresses within the same IP address family). >>> >>> >>> Regards >>> Thomas >>> >>>> -----Ursprüngliche Nachricht----- >>>> Von:mohamed.boucadair@orange.com >>>> [mailto:mohamed.boucadair@orange.com] >>>> Gesendet: Mittwoch, 13. März 2013 13:40 >>>> An: Stach, Thomas;Simo.Veikkolainen@nokia.com;mmusic@ietf.org >>>> Betreff: RE : [MMUSIC] I-D Action: >>>> draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>>> >>>> Dear Thomas, >>>> >>>> I'm not proposing to change the existing behavior; I'm just >>>> asking whether it is acceptable to add an additional example >>>> to the one already cited in the text. >>>> Wouldn't that be acceptable? >>>> >>>> You can propose to add another example if you have any in mind. >>>> >>>> Cheers, >>>> Med >>>> >>>> ________________________________________ >>>> De : Stach, Thomas [thomas.stach@siemens-enterprise.com] >>>> Date d'envoi : mercredi 13 mars 2013 17:57 >>>> À : BOUCADAIR Mohamed OLNC/OLN;Simo.Veikkolainen@nokia.com; >>>> mmusic@ietf.org >>>> Objet : AW: [MMUSIC] I-D Action: >>>> draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>>> >>>> Mohammed, >>>> >>>> I think you have draft-boucadair-mmusic-altc in mind. >>>> This is an individual submission intended to document some >>>> proporietary mechanism. >>>> I don't think we should make restrictions in a standards >>>> track document in support of proprietary mechanisms. >>>> Otherwise I could also think of additional proprietary stuff >>>> that could be mentioned as well. >>>> >>>> >>>> Regards >>>> Thomas >>>> >>>>> -----Ursprüngliche Nachricht----- >>>>> Von:mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] >>>>> Im Auftrag vonmohamed.boucadair@orange.com >>>>> Gesendet: Mittwoch, 13. März 2013 11:20 >>>>> An:Simo.Veikkolainen@nokia.com;mmusic@ietf.org >>>>> Betreff: Re: [MMUSIC] I-D Action: >>>>> draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>>>> >>>>> Hi Simo, >>>>> >>>>> The document says: >>>>> >>>>> The 'ccap' attribute MUST NOT be used in >>>>> situations where an existing mechanism (such as Interactive >>>>> Connectivity Establishment (ICE) [RFC5245]) can be used to select >>>>> between different connection addresses (e.g. "IP4" and "IP6" or >>>>> different IP addresses within the same IP address family). >>>>> >>>>> Would it be possible to change it to the following: >>>>> >>>>> NEW: >>>>> >>>>> The 'ccap' attribute MUST NOT be used in >>>>> situations where a mechanism (such as Interactive >>>>> Connectivity Establishment (ICE) [RFC5245] or [ALTC]) is >>>>> used to select >>>>> between different connection addresses (e.g. "IP4" and "IP6" or >>>>> different IP addresses within the same IP address family). >>>>> >>>>> >>>>> Thanks. >>>>> Cheers, >>>>> Med >>>>> >>>>> >>>>>> -----Message d'origine----- >>>>>> De :mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] >>>>>> De la part deSimo.Veikkolainen@nokia.com >>>>>> Envoyé : mercredi 13 mars 2013 16:09 >>>>>> À :mmusic@ietf.org >>>>>> Objet : Re: [MMUSIC] I-D Action: >>>>>> draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>>>>> >>>>>> Hello, >>>>>> >>>>>> We just submitted a new version of the miscellaneous-caps >>>>>> draft, with text that states that if the connection data >>>>>> capability attribute (a=ccap) is used the port number in the >>>>>> resulting SDP MUST be the same as in the original "m=" line, >>>>>> except for PSTN type bearers (when the port number used is 9). >>>>>> >>>>>> Regards, >>>>>> Simo >>>>>> >>>>>> -----Original Message----- >>>>>> From:mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] >>>>>> On Behalf Of extinternet-drafts@ietf.org >>>>>> Sent: 13. maaliskuuta 2013 15:39 >>>>>> To:i-d-announce@ietf.org >>>>>> Cc:mmusic@ietf.org >>>>>> Subject: [MMUSIC] I-D Action: >>>>>> draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>>>>> >>>>>> >>>>>> A New Internet-Draft is available from the on-line >>>>>> Internet-Drafts directories. >>>>>> This draft is a work item of the Multiparty Multimedia >>>>>> Session Control Working Group of the IETF. >>>>>> >>>>>> Title : Miscellaneous Capabilities >>>>>> Negotiation in the Session Description Protocol (SDP) >>>>>> Author(s) : Miguel A. Garcia-Martin >>>>>> Simo Veikkolainen >>>>>> Robert R. Gilman >>>>>> Filename : >>>>>> draft-ietf-mmusic-sdp-miscellaneous-caps-04.txt >>>>>> Pages : 21 >>>>>> Date : 2013-03-13 >>>>>> >>>>>> Abstract: >>>>>> SDP has been extended with a capability negotiation mechanism >>>>>> framework that allows the endpoints to negotiate >>>>> transport protocols >>>>>> and attributes. This framework has been extended with a media >>>>>> capabilities negotiation mechanism that allows endpoints to >>>>>> negotiate >>>>>> additional media-related capabilities. This negotiation >>>>> is embedded >>>>>> into the widely-used SDP offer/answer procedures. >>>>>> >>>>>> This memo extends the SDP capability negotiation >>>>> framework to allow >>>>>> endpoints to negotiate three additional SDP capabilities. In >>>>>> particular, this memo provides a mechanism to negotiate >>>> bandwidth >>>>>> ('b=' line), connection data ('c=' line), and titles >>>>> ('i=' line for >>>>>> each session or media). >>>>>> >>>>>> >>>>>> The IETF datatracker status page for this draft is: >>>>>> https://datatracker.ietf.org/doc/draft-ietf-mmusic-sdp-miscella >>>>>> neous-caps >>>>>> >>>>>> There's also a htmlized version available at: >>>>>> http://tools.ietf.org/html/draft-ietf-mmusic-sdp-miscellaneous-caps-04 >>>>>> >>>>>> A diff from the previous version is available at: >>>>>> http://www.ietf.org/rfcdiff?url2=draft-ietf-mmusic-sdp-miscella >>>>>> neous-caps-04 >>>>>> >>>>>> >>>>>> Internet-Drafts are also available by anonymous FTP at: >>>>>> ftp://ftp.ietf.org/internet-drafts/ >>>>>> >>>>>> _______________________________________________ >>>>>> mmusic mailing list >>>>>> mmusic@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/mmusic >>>>>> _______________________________________________ >>>>>> mmusic mailing list >>>>>> mmusic@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/mmusic >>>>>> >>>>> _______________________________________________ >>>>> mmusic mailing list >>>>> mmusic@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/mmusic >>>>> >>> _______________________________________________ >>> mmusic mailing list >>> mmusic@ietf.org >>> https://www.ietf.org/mailman/listinfo/mmusic >>> >>> --------------------------------------------------------------------- >>> This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. >>> >>> --------------------------------------------------------------------- >>> This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. >> -- >> Jonathan Lennox >> jonathan@vidyo.com >> >> >> _______________________________________________ >> mmusic mailing list >> mmusic@ietf.org >> https://www.ietf.org/mailman/listinfo/mmusic >> . >> >
- [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-miscel… internet-drafts
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Simo.Veikkolainen
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… mohamed.boucadair
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Stach, Thomas
- [MMUSIC] RE : I-D Action: draft-ietf-mmusic-sdp-m… mohamed.boucadair
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Stach, Thomas
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Atle Monrad
- [MMUSIC] RE : I-D Action: draft-ietf-mmusic-sdp-m… mohamed.boucadair
- [MMUSIC] RE : I-D Action: draft-ietf-mmusic-sdp-m… mohamed.boucadair
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… DOLLY, MARTIN C
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Andrew Allen
- [MMUSIC] RE : RE : I-D Action: draft-ietf-mmusic-… mohamed.boucadair
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Atle Monrad
- Re: [MMUSIC] RE : RE : I-D Action: draft-ietf-mmu… Andrew Allen
- [MMUSIC] RE : RE : RE : I-D Action: draft-ietf-mm… mohamed.boucadair
- Re: [MMUSIC] RE : RE : I-D Action: draft-ietf-mmu… Simo.Veikkolainen
- Re: [MMUSIC] RE : RE : I-D Action: draft-ietf-mmu… mohamed.boucadair
- Re: [MMUSIC] RE : RE : I-D Action: draft-ietf-mmu… Simo.Veikkolainen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Jonathan Lennox
- Re: [MMUSIC] RE : RE : I-D Action: draft-ietf-mmu… mohamed.boucadair
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Flemming Andreasen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… mohamed.boucadair
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Flemming Andreasen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Jonathan Lennox
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… mohamed.boucadair
- [MMUSIC] RE : RE : I-D Action: draft-ietf-mmusic-… mohamed.boucadair
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Flemming Andreasen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Flemming Andreasen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Jonathan Lennox
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Andrew Allen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Stach, Thomas
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Flemming Andreasen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Andrew Allen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Flemming Andreasen
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Hadriel Kaplan
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Hadriel Kaplan
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… mohamed.boucadair
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Simo.Veikkolainen
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Hadriel Kaplan
- Re: [MMUSIC] I-D Action: draft-ietf-mmusic-sdp-mi… Flemming Andreasen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Flemming Andreasen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Andrew Allen
- Re: [MMUSIC] RE : I-D Action: draft-ietf-mmusic-s… Flemming Andreasen