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- This is only a rough draft - Megan 04/08/92
-
- Internet Accounting Working Group Meeting Minutes
- 17-Mar-92 to 18-Mar-92
-
-
- Internet Accounting Architecture
-
- The Tuesday session began with a presentation by Jim Alfieri of
- Bellcore. Jim spoke on Bellcore' plans for SMDS (Switched Multi-megabit
- Data Service) usage accounting. He mentioned that packet counting was
- done upon egress from the switch (in our last session, the issue of
- where to count was raised and the WG agreed that the architecture should
- support both counting on entrance and counting on exit).
-
- Jim explained that the SMDS accounting service does not use the Meter
- -> collector -> application model, where the collector aggregates
- frequent meter reports into a usage file. In the SMDS case, the meter
- (inside the SMDS node) itself does the aggregation of usage data to a
- file. This file, in AMA TPS (Automatic Message Accounting
- TeleProcessing System) format, is periodically transferred directly to
- the billing system application via FTP. A drawback of this architecture
- is that FTP service provides no security. Further details can be found
- in Bellcore Technical Advisory TA-TSV-001062, "Generic Requirements for
- SMDS Customer Network Management Service".
-
- The rest of the session focussed on the most recent version of the
- Internet Accounting Architecture document. Working group participants
- offered comments, criticisms and suggestions that will be incorporated
- into the next draft. In particular the following modifications will be
- made.
-
- o Explain that it is the collector's responsibility to manage
- time and determine/interpret the meaning of meter ticks.
-
- o Discuss space reclamation strategies for dealing with memory
- exhaustion in the meter.
-
- o Discuss the problem of trap storms that may occur when the
- meter is trying to avoid losing data due to memory exhaustion.
-
- o Discuss the possibility of trapping to other/multiple managers.
-
- o Discuss the (in)applicability of the RMON MIB.
-
- We believe that when the WG input has been incorporated in the document
- and it has been reviewed by the mailing list it will be ready to become
- an Internet Draft.
-
- Internet Accounting MIB
-
- On Wednesday the WG discussed the first real draft of the IA MIB.
- Many detailed (but important) changes were suggested and will be
- incorporated into the next version of the architecture document. Among
- them:
-
- o Put a general explanatory section up front.
-
- o Add/improve the descriptions of special values for
- parameters. As a special case, zero values should be used in
- certain cases (e.g. high water mark or flood mark) to disable
- a feature.
-
- o We need to add text explaining flows.
-
- o The MIB's "address type" should be expanded to include (a)
- layer number and (b) type (e.g. if layer = 2, allow all
- interface designations from the standard MIB).
-
- o Use standard SNMP timeticks (1/100 second).
-
- o Explain what max lifetime is good for.
-
- o Recommend UDP checksums.
-
-
- The WG will conduct a discussion of these changes and review this
- document over the Internet in the next couple of months with a view of
- advancing it to the status of Internet Draft by the next IETF
- conference.
-
- General
-
- The WG discussed what should be done when the architecture and MIB
- documents are completed. It was generally felt that implementation of a
- prototype accounting system was next. This could be done either through
- a revision/extension of the WG's charter, or by forming a new,
- successor WG.
-