Re: [v6ops] Happy Eyeballs and SIP

> -----Original Message-----
> From: v6ops-bounces@ietf.org [mailto:v6ops-bounces@ietf.org] On Behalf
> Of Olle E. Johansson
> Sent: Monday, March 07, 2011 2:04 PM
> To: mohamed.boucadair@orange-ftgroup.com
> Cc: v6ops@ietf.org
> Subject: Re: [v6ops] Happy Eyeballs and SIP
> 
> 
> 7 mar 2011 kl. 13.51 skrev <mohamed.boucadair@orange-ftgroup.com>:
> 
> > Dear Olle,
> >
> > For the SIP case, if you don't need connectivity checks (e.g., closed
> networks, which is in France the majority of SIP traffic) you can just
> use the ALTC attribute defined in http://tools.ietf.org/html/draft-
> boucadair-mmusic-altc-01.
> That is a simple fix for the media issue - and something I think
> developers can easily implement. We still have the issue with
> signalling and registrations.
> >
> > In case connectivity checks are needed, a variant of the happy
> eyeballs for SIP (called Happy Eardrums) has been proposed in
> http://tools.ietf.org/html/draft-wing-dispatch-v6-migration-00 but
> still you need to be sure you IPv4 connectivity is working ;-).
> Will look at this tomorrow... :-)
> 
> Thanks for the ALTC proposal. I am a bit hesitant to the ICE/TURN/SIP-
> outbound combo, it will take a long time to convince developers and the
> market to implement that package...

I agree that ICE is a big pill to swallow.  (If we're talking only
IPv4/IPv6 selection, though, TURN is not part of that equation.)

However, industry experience with IPv6 on the Internet shows that
we cannot rely on the "we both have an IPv6 address, therefore we
have connectivty" assumption.  There are IPv6 islands (on purpose
or on accident) which are permanent or temporary (failure of a 
link or a router), and because IPv4 is predominant the IPv6 failure
is not immediately noticed or corrected -- but impacts users
that support IPv6.

-d

> /O
> >
> > Cheers,
> > Med
> >
> >
> > -----Message d'origine-----
> > De : v6ops-bounces@ietf.org [mailto:v6ops-bounces@ietf.org] De la
> part de Olle E. Johansson
> > Envoyé : lundi 7 mars 2011 10:40
> > À : v6ops@ietf.org
> > Objet : [v6ops] Happy Eyeballs and SIP
> >
> > Hi!
> >
> > Has anyone considered the issues covered in the happy-eyeballs draft
> for SIP?
> >
> > A 19 or 32 second time out when placing a call is not a good user
> experience... I think this applies to SIP over TCP, and possibly also
> needs to be handled for UDP.
> > I don't see this handled in the draft for IPv6 transition in the
> Session Initiation Protocol (soon-to-be RFC 6157)
> >
> > Seems like the scope of the happy eyeballs draft is HTTP, so the
> question is if this should be expanded or if we need other drafts for
> other protocols.
> >
> > Regards,
> > /Olle
> >
> > Ref: http://tools.ietf.org/html/draft-ietf-sipping-v6-transition-07
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> >
> >
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> ---
> * Olle E Johansson - oej@edvina.net
> * Cell phone +46 70 593 68 51, Office +46 8 96 40 20, Sweden
> 
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