Policy-based Accounting Draft Policy-based Accounting Draft UpdateUpdate

Tanja Zseby, Sebastian ZanderFraunhofer Institute FOKUS

Competence Center for Global Networking (GloNe)[zseby, zander]@fokus.fhg.de

http://www.fokus.fhg.de

December 14, 2001 2

Comments on DraftComments on Draft Draft reviewed by IESG Several comments received

– Wording/Clarification– Terminology– Technical Issues

New version sent to the AAAARCH list Plan:

– Include result from discussion today– Submit revised I-D ASAP

December 14, 2001 3

Wording/ClarificationWording/Clarification Motivation/problem statement enhanced Clarified that providers need to agree on allowed policies beforehand (for

accounting agreements between providers, roaming ) Clarified that metering/collection policies can be derived from accounting

policies Clarified that accounting policies do not configure charging and billing

process Clarified that policies can consist of multiple rules Accounting Policy Attributes (differ from accounting attributes)

– Section split into subsections: accounting policy condition, and policy action– Rephrased: variables in policy condition/action– New attributes explained

More realistic values in examples Usage of the word “enforced”: policies are enforced by the network

elements References for DiffServ, bandwidth broker, mobile IP included Typos, crossreferences

December 14, 2001 4

Terminology (1)Terminology (1) Meter, Reader/Collector, Manager

– As used in RFC2722 (RTFM) – Meter includes classifier (differs from DiffServ definition)

Meter This document uses the definition of meter as given in [RFC2722].

This meter definition already includes the classification of packets. With this it differs from the DiffServ model [RFC2475] where classifier and meter are considered as separate entities.

Classifier/Filter– As used in RFC2475 (DiffServ)– Used only for additional (external) classification

ClassifierThis document uses the definition of classifier as given in [RFC2475]. Since this document assumes that meters already include classification functions, the term classifier is only used for entities that perform additional classification (e.g. as part of data post processing).

December 14, 2001 5

Terminology (2)Terminology (2) Service Class

– Service definition taken from policy terminology draft

– Service class: service with specific propertiesService Class

A service class specifies the handling of a service (as defined in [RFC3198]) belonging to that class by the service provider. A service class has some kind of identifier (e.g. name) and the handling of the service is defined by a Service Level Specification (SLS) as described in [RFC3198].

December 14, 2001 6

Technical Issues (1)Technical Issues (1) AccountingAccounting Accounting describes the collection of data about resource

consumption. This includes the control of data gathering (via metering), transport and storage of accounting data...

Comment: Accounting as one particular layer in accounting architecture which only provides specific accounting functions […] is confusing

Metering

Accounting

Collection

AAA

Service EquipmentMetering

Collection

Accounting AAAASM

Model in draft Alternative Model AAA Architecture

December 14, 2001 7

Technical Issues (2)Technical Issues (2) Does AAA configure services ?

– General issue for AAAARCH group– Already some discussion on mailing list– Maybe just clarification needed:

• not the AAA server but the ASM configures the service

• AAA servers only forward configuration data (like RADIUS passes configuration information to clients)

Other Opinions ?

Thank you for your attention !Thank you for your attention !