RE: [Sip] namespaces in RFC 4411, 4412 and draft-ietf-sip-rph-new-namespaces-00

["DRAGE, Keith \(Keith\)" <drage at alcatel-lucent.com>]

I don't think it is explicitly covered in the RFC 4412, but there are
clear pointers to what needs to be done.

There needs to be agreement between the administrative domains as to
what is passed across the boundaries between the adminstrative domains.
This could take a number of forms:

-	the header is not passed at all because there is no agreement
between the administrations. Any priority handling only exists in the
source domain.
-	the header is passed and the two administrations agree to use
the same namespace in a compatible fashion.
-	by agreement, different namespaces are conveyed by the two
adminstrations, and two Resource-Priority headers are included that are
each used by the owning administration. 

Regards

Keith

> -----Original Message-----
> From: Attila Sipos [mailto:attila.sipos at vegastream.com] 
> Sent: Monday, November 05, 2007 3:14 PM
> To: sip at ietf.org
> Subject: RE: [Sip] namespaces in RFC 4411,4412 and 
> draft-ietf-sip-rph-new-namespaces-00
> 
> 
> Hi,
> 
> I have tried asking these questions on SIP-implementors but 
> not getting any responses.  Are these silly questions...?
> 
> 
> 
> 
> -----Original Message-----
> From: sip-implementors-bounces at lists.cs.columbia.edu
> [mailto:sip-implementors-bounces at lists.cs.columbia.edu] On 
> Behalf Of Attila Sipos
> Sent: 01 November 2007 08:52
> To: sip-implementors at lists.cs.columbia.edu
> Subject: [Sip-implementors] namespaces in RFC 4411,4412 and 
> draft-ietf-sip-rph-new-namespaces-00
> 
> 
> 
> Are namespaces just a way to group together different users 
> across different DNS domains?
> 
> What if a.com is using namespaces "dsn-000000" to "dsn-000009"
> and b.com is using the same namespaces?
> Then if A at a.com calls B at b.com, wouldn't the namespaces interfere?
> 
> 
> What looks after or checks the namespaces?
> Is it that a proxy knows what everyone's namespace should be?
> So if someone wants to do "UA Preemption" and tries to use a 
> resource priority level higher than they should have, then 
> will the domain's proxy downgrade it back to the correct 
> permitted level?
> 
> 
> Regards,
> 
> Attila
> 
> 
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