[Dime] RE: Diameter base protocol messages used by DCCA

["Harri Hakala \(TU/LMF\)" <harri.hakala at ericsson.com>]

Hi Glen,

The DCCA document defines two different approaches to perform the first credit control 
interrogation to be used in different network architectures. The first approach 
uses credit-control messages after the user's authorization and authentication 
takes place. The second approach uses service specific authorization messages 
(such as AAA/AAR) to perform the first interrogation during the user's 
authorization/authentication phase, and credit-control messages for the 
intermediate and final interrogations. 

AA Request/AA Answer are not necessarily equal to AAR/AAA messages in NASREQ but 
they mean in DCCA document a general authorization/authentication request/answer 
in any Diameter authorization/authentication application. Bad name example, as it 
seems to collide with the message name in NASREQ.

If the CCA client supports the second approach and e.g. NASREQ is used for service
authorization, then the CCA client sends/receives AAR/AAA messages.

As this "AA Request/AA Answer" is a general message, not explicit NASREQ message, 
we did not include it the table in section 10. 

regards............Harri


> -----Original Message-----
> From: Glen Zorn (gwz) [mailto:gwz at cisco.com] 
> Sent: 15. kesäkuuta 2006 3:59
> To: Harri Hakala (TU/LMF); Leena Mattila (TU/LMF); 
> juha-pekka.koskinen at nokia.com; marco.stura at nokia.com; 
> John.Loughney at nokia.com
> Cc: Glen Zorn (gwz); aaa-wg at merit.edu; dime at ietf.org
> Subject: Diameter base protocol messages used by DCCA
> 
> In the process of attempting to construct a MIB for the 
> credit control application, I have been trying to figure out 
> which messages from Diameter base are used by DCCA, so that 
> they can be counted appropriately.  Some are obvious: STR/STA 
> & RAR/RAA, for example.  One has me rather puzzled, though: 
> the AAR/AAA exchange is explicitly listed in the first state 
> machine in section 7 as being sent/received by the CCA 
> client, but the AVPs allowed in AAR/AAA are not listed in 
> section 10 (though the APS for RAR/RAA ARE).  Does the CCA 
> client actually send/receive AAR/AAA (i.e., should the be 
> counted in the DCCA MIB) or not?
> 
> ~gwz
> 
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