Re: [v6ops] Happy Eyeballs and SIP

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.

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 ;-).

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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