Subject: Re: [Sipping] Revisiting: reg event package extensions

From: David R Oran <[email-masked]>
Date: Tue, 21 Sep 2004 16:01:55 -0400

see inside.

On Sep 20, 2004, at 4:45 PM, Paul Kyzivat wrote:

> Before ietf-60 I submitted draft-kyzivat-sipping-gruu-reg-event-00, 
> but it never got much discussion on the list. It was briefly discussed 
> at the meeting, and some interest was expressed in the topic. But it 
> needs more list discussion first.
>
> The issue it addresses is that when the GRUU extension is used, much 
> of the value of the reg event package is lost. Specifically:
>
> - the reason a UA uses the gruu extension when registering is
>   because the address it knows for itself is not globally routable.
>
> - it registers that address and obtains a gruu that *is* globally
>   routable. It wants to provide the gruu to everyone else (other
>   than the registrar) that may attempt to reach it.
>
> - the reg event package provides watchers with the contact addresses
>   registered with it. Often the reason the watcher wants this info
>   is so that it may address some request to one of those registered
>   contact addresses.
>
> - when a gruu was assigned for the contact, the returned contact
>   is likely not to be usable by the watcher.
>
> The essence of the proposal is simply to extend the document returned 
> to watchers so that it includes the gruu associated with a contact 
> when one has been assigned.
>
> I would like ot get feedback on this proposal:
>
> - do you understand the problem?
yes
> - do you agree that it needs to be solved
unless we plan to deprecate/obsolete the regevent package entirely and 
replace it with presence extensions, then yes.

> - do you find the proposed solution acceptable?
yes

> - would you like to see any other extensions to the reg event package?
no opinion.

Dave.
>
> 	Thanks,
> 	Paul
>
>
> _______________________________________________
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David R. Oran
Cisco Fellow
Cisco Systems
7 Ladyslipper Lane
Acton, MA 01720 USA
Tel: +1 978 264 2048
Email: [email-masked]

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