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Re: [AVTCORE] RTP Topology addition (was: Design choice comments..._

"David Benham (dbenham)" <dbenham@cisco.com> Mon, 23 March 2015 17:55 UTC

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From: "David Benham (dbenham)" <dbenham@cisco.com>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>
Thread-Topic: RTP Topology addition (was: Design choice comments..._
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Date: Mon, 23 Mar 2015 17:55:00 +0000
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Cc: 'IETF AVTCore WG' <avt@ietf.org>
Subject: Re: [AVTCORE] RTP Topology addition (was: Design choice comments..._
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> From: Magnus Westerlund [mailto:magnus.westerlund@ericsson.com]
> > That said, and to your RTP translator observation, wish to explore
> > adding another RTP topology called "RTP Translator Forwarding Switch
> > (RTFS)."   Channeling Steve Wenger's post shortly before IETF 91,  '
> > ..topologies document is never really done' or something like that.
> > Can I get this started and in to the topologies doc update?
> 
> As one of the authors of the document. Currently passed working group
> last call and updated and ready for publication request, I say maybe.
> But, please understand that we thought we was currently done.

Understood.   

> I think you need to start by actually describing in which way this RTFS
> is different from the RTP mixer or the SFM. Is this really different
> from what is already described, or simply a variant?

From the doc, the SFM appears to require, like the media switching mixer referenced, a collection of its own SSRCs (ie, terminating SSRCs on all legs), sending only a finite set of SSRC values downstream to any given recipient or a 'cascade link' to another box.   

Is an SFM allowed per the definition to reuse the senders/upstream SSRCs, sending a potentially unlimited set of SSRCs downstream/to any given recipient?  Is allowing that a variant or?


> Thus, please provide text to describe this thing you want to add.
> 
> Cheers
> 
> Magnus Westerlund
> 
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