1. Policy-based Accounting Draft Version 01 Policy-based Accounting Draft Version 01 Georg Carle, Sebastian Zander, Tanja Zseby GMD FOKUS - German National Research Institute for Information Technology Competence Center Global Networking (GloNe) http://www.fokus.gmd.de

2. December 10, 2000IRTF Meeting - AAAARCH RG2 Outline Policy-based Accounting (Overview) Changes from version 00 to 01 Policy language requirements Policies derived from SLA Future Work and Open Issues

3. December 10, 2000IRTF Meeting - AAAARCH RG3 Policy-based Accounting - Key Features Accounting Policies –Definition of rules for generation, transport and storage of accounting data –Used for the configuration of the accounting process Key Features –Support for variety of accounting services Flexible configuration of accounting process –Configuration of heterogeneous accounting components Definition of common parameters for metering and collection Translation of policies into device specific configuration –Inter-Provider exchange of configuration information

4. December 10, 2000IRTF Meeting - AAAARCH RG4 -00 to -01 Changes Added example from Pittsburgh –Diffserv with integrated accounting –Accounting indications with accounting as separate service –Minor changes to align terminology with aaaarch policy definitions Added more detailed explanation for discrete accounting model and separate metering service Changed integrated and discrete accounting model pictures according to Dublin discussion (acct policy location) Added discussion about verification of accounting data correctness in security section Changed minor picture details for clarification Fixed typos and wording

5. December 10, 2000IRTF Meeting - AAAARCH RG5 Policy Language: What do we need ? Language for the expression of –Accounting Policies –Metering Policies Differentiation of Policy Types (mail from Dave Spence) –Service provisioning policies translates service specification attributes into attributes for the service equipment –Configuration Policies used in service equipment to set up the service gets parameters from service provisioning policy as input Mapping –Accounting Policies can be seen as Service Provisioning Policies –Metering Policies can be seen as Configuration Policies

6. December 10, 2000IRTF Meeting - AAAARCH RG6 Policy Examples Accounting Policies –Translates accounting service attributes into accounting instructions –Special kind of service provisioning policies –Example: if accounting_type==comprehensive { result_format = detailed; report_interval = 120 s; report_target = 193.175.12.8/5678; } Metering Policies –Translates common parameters into meter specific configuration information –Example: if meter == netramet { command = "nm_rc -c report_interval -m report_target"; }

7. December 10, 2000IRTF Meeting - AAAARCH RG7 Policies derived from SLA Define in advance (and with user) –How accounting is done (Accounting Policy) –How service quality is verified (QoS Auditing) => Settings in SLA Derive Measurement Configuration from SLA –Accounting Policies from tariff and user profile –QoS Auditing Policies from QoS values and measurement requirements –Accounting and QoS Auditing can share components –Definition independent of specific meter infrastructure

8. December 10, 2000IRTF Meeting - AAAARCH RG8 SLA as Information Base SLA Accounting Policies QoS Auditing Policies QoS values Measurement Requirements Tariff variables User Profile ASM Measurement Infrastructure

9. December 10, 2000IRTF Meeting - AAAARCH RG9 Policy Parameters Measurement Basic Parameters –Metric (volume, loss, owd, rtt,jitter) (what should be measured) –Measurement Method (how is metric measured) –Classification rules (for which kind of packets) Measurement Process –Start/stop time or event –Measurement intervals (how often and in which intervals is a result produced) Report Process –Transport type (e.g. push/pull mode) –Result format (record structure) –Report target (e.g. file or IP-address/port) –Report interval Metric and Method Specific Parameters –e.g. for volume: cumulated or difference –owd: packet_id generation function,...

10. December 10, 2000IRTF Meeting - AAAARCH RG10 Future Work and Open Issues Derivation of policies from SLA –Accounting Policies from tariff and user profile –Measurement Policies for SLA validation (QoS Auditing) Further align policy terminology Language to express accounting policies Bindings –User ID to Accounting Data (via Authentication and Authorization –Sessions Auditing –Session ID => Session ID Document

11. Thank You !