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Manageability Considerations: Experience from the PCE WG Julien Meuric

Manageability Considerations: Experience from the PCE WG Julien Meuric (julien.meuric@orange-ftgroup.com) Quoting current and former PCE co-chairs: Jean-Philippe Vasseur, a.k.a. J.P. Adrian Farrel, 2009 A.D. A Bit of His(S)tory. Back to IETF 65, March 2006

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Manageability Considerations: Experience from the PCE WG Julien Meuric

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  1. Manageability Considerations: Experience from the PCE WG Julien Meuric (julien.meuric@orange-ftgroup.com) Quoting current and former PCE co-chairs: Jean-Philippe Vasseur, a.k.a. J.P. Adrian Farrel, 2009 A.D.

  2. A Bit of His(S)tory • Back to IETF 65, March 2006 • Dallas is flooded on Sunday evening • PCE WG is one-year-old • draft-farrel-rtg-manageability-requirements-01 is available • A co-chair with a grey beard • Sailing against wind and tide • Came from the UK... • … up with a proposal

  3. The (Decent) Proposal • Make a manageability section mandatory in every single I-D (similarly to the security considerations) • Convert that manageability I-D into a process experiment (RFC 3933) • Limit the scope to the PCE WG • Get support from: chairs, WG, routing area ADs, IETF • Run the experiment for milestones • Report to the IESG and routing area ADs at the end of the period

  4. The (Good) Reasons • Some I-Ds already included extensive manageability consideration sections (e.g., architectural I-D) • Manageability is important to the PCE anyway (maybe it is not such an overhead) • More work for reviewers and chair to make sure there is conformance • Better end product

  5. Steping into the WG • October 2006 • draft-farrel-pce-manageability-requirements-00 is published • January 2007 • WG is polled on adoption of -02 • Positive comments are sent to the list • The I-D is endorsed by the WG • Experiment can officially start • PCE I-Ds MUST include a manageability section • This mandatory section MAY be empty

  6. Recommended Subsections • Control of Function Through Configuration and Policy • Information and Data Models, e.g. MIB modules • Liveness Detection and Monitoring • Verifying Correct Operation • Requirements on Other Protocols and Functional Components • Impact on Network Operation • ...

  7. Document Examples • RFC 4655: PCE-Based Architecture • RFC 4655: Requirements for PCE Discovery • RFC 5088: OSPF Extensions for PCE Discovery • RFC 5440: PCEP • RFC 5520: Topology Confidentiality • RFC 5623: Framework for Inter-Layer TE

  8. Conclusions • Mandating the manageability section has been beneficial to PCE documents • Went more easily through IESG • Protocol design with operators' final use in mind • Does not seem a burden • Section can say there is nothing to say • Other WGs such as ROLL adopted that approach in the design of new protocols such as RPL • What about widening the scope beyond? • RFC 5706 obsoletes draft-farrel: I-D moved to historic but experiment actually happened

  9. A Few Quotes • A beardless chair: “not only helped protocol designer think about how protocol should be managed but in several ways, it also influence some aspects of the protocol design: an overall extremely positive experience” • A carrier: “architects focus on protocols, but daily operators see them through management; useful initiative to fill that hole from day 1!” • A Routing AD: “Can you fill that slot?”

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