Re: [MMUSIC] Trickle ICE for SIP Questions
Paul Kyzivat <pkyzivat@alum.mit.edu> Tue, 09 July 2013 22:00 UTC
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Date: Tue, 09 Jul 2013 17:59:04 -0400
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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To: "Stach, Thomas" <thomas.stach@siemens-enterprise.com>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [MMUSIC] Trickle ICE for SIP Questions
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On 7/9/13 5:21 PM, Stach, Thomas wrote: > Paul, > >> -----Original Message----- >> From: Paul Kyzivat [mailto:pkyzivat@alum.mit.edu] >> Sent: Monday, 08 July, 2013 18:05 >> To: Stach, Thomas >> Cc: mmusic@ietf.org >> Subject: Re: [MMUSIC] Trickle ICE for SIP Questions >> >> Just responding to things that haven't already been covered. >> >> On 7/8/13 5:44 AM, Stach, Thomas wrote: >> >>>> Yes, why is it such an issue to require PRACK? >>> [TS] I see potential for easier GW/SBC interworking with vanilla-ICE >> UAs, that did not implement PRACK >> >> I don't get it. >> >> If you are talking about SBCs that terminate/relay media, then the leg >> doing trickle-ICE is separate from the leg doing vanilla-ICE. So what >> is >> the issue? > >> >> And if you have a signaling-only SBC, and one leg supports trickle-ICE >> while the other side supports only vanilla-ICE, then just use >> vanilla-ICE e2e. You won't gain anything by an intermediary trying to >> map trickle-ICE to vanilla-ICE. > [TS] > If the trickle-ICE side uses PRACK and the vanilla ICE side does not, the interworking SBC does not only have to collect the trickled candidates and send it on as a bunch once trickling finished. It also has to interwork PRACK. > As you know the PRACK request can contain a new SDP offer or you could also use UPDATE for another SDP O/A before the 200 OK to the INVITE request. This is rather nasty to interwork if not impossible. If trickle-ICE worked without PRACK, then the SBC *still* needs to collect up all the trickled candidates and send them when it can based on the limitations of vanilla-ICE. So the use of trickle-ICE provides no speedup compared to using vanilla-ICE e2e. Also, it sounds like trickle-ICE is requiring changes in the ordering of how candidates are tried. If one side uses trickle-ICE and the other doesn't, then ISTM that may break. So I'm still not seeing a case here when it makes sense to gateway between trickle-ICE and vanilla-ICE. There may be one, but I'm not seeing it. Thanks, Paul
- Re: [MMUSIC] Trickle ICE for SIP Questions Stach, Thomas
- [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Dan Wing
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Stach, Thomas
- Re: [MMUSIC] Trickle ICE for SIP Questions Stach, Thomas
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Paul Kyzivat
- Re: [MMUSIC] Trickle ICE for SIP Questions Marc Petit-Huguenin
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Marc Petit-Huguenin
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Marc Petit-Huguenin
- Re: [MMUSIC] Trickle ICE for SIP Questions Paul Kyzivat
- Re: [MMUSIC] Trickle ICE for SIP Questions Paul Kyzivat
- Re: [MMUSIC] Trickle ICE for SIP Questions Stach, Thomas
- Re: [MMUSIC] Trickle ICE for SIP Questions Stach, Thomas
- Re: [MMUSIC] Trickle ICE for SIP Questions Paul Kyzivat
- Re: [MMUSIC] Trickle ICE for SIP Questions Paul Kyzivat
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Cullen Jennings (fluffy)
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Paul Kyzivat
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Alan Johnston
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Parthasarathi R
- Re: [MMUSIC] Trickle ICE for SIP Questions Vijaya Mandava (vimandav)
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Cullen Jennings (fluffy)
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Parthasarathi R
- Re: [MMUSIC] Trickle ICE for SIP Questions Parthasarathi R
- Re: [MMUSIC] Trickle ICE for SIP Questions Emil Ivov
- Re: [MMUSIC] Trickle ICE for SIP Questions Paul Kyzivat
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Vijaya Mandava (vimandav)
- Re: [MMUSIC] Trickle ICE for SIP Questions Parthasarathi R
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Christer Holmberg
- Re: [MMUSIC] Trickle ICE for SIP Questions Stach, Thomas
- [MMUSIC] UPDATE vs INFO for SIP Trickle ICE [was … Parthasarathi R