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Composite Link (CL ): status update and Framework

Composite Link (CL ): status update and Framework. Ning So, Curtis Villamizar, Dave McDysan, Andy Malis, Lucy Yong, Eric Osbourne. Status Update of CL drafts . draft-ietf-rtgwg-cl-requirement-07 Minor changes since last IETF. WG doc awaiting advancement of other two CL docs

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Composite Link (CL ): status update and Framework

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  1. Composite Link (CL):status update and Framework Ning So, Curtis Villamizar, Dave McDysan, Andy Malis, Lucy Yong, Eric Osbourne

  2. Status Update of CL drafts • draft-ietf-rtgwg-cl-requirement-07 • Minor changes since last IETF. • WG doc awaiting advancement of other two CL docs • draft-ietf-rtgwg-cl-use-cases-00 (accepted as WG doc in July) • New in Feb (draft-symmvo-rtgwg-cl-use-cases-01) • Minor update in June • Mostly background information moved out of other documents and not thought to be at all controversial.

  3. CL Framework • draft-ietf-rtgwg-cl-framework-00 (Accepted as WG doc in July) • Updated in June • Some background had been moved to CL Use Cases, more may be needed • Proposed a set of documents to cover components of a total solution • Does not dictate specific solution, only characteristics, but does cite candidate solutions

  4. Possible Topics for Solution Draft(s) • Dynamic Multipath Balance • Path Symmetry (Challenges) • Packet Ordering Requirements • Performance, Scalability, and Stability • IP and LDP Traffic Already suggested in the draft. Each topic can be covered in greater detail and can be referenced from CL Framework draft.

  5. CL Framework - Protocol Focus • Component Link Grouping and Advertisement • base functionality • draft-ospf-cc-stlvcould be extended • Delay and Jitter Extensions • more or less independent set of extensions • draft-wang-ccamp-latency-te-metric (expired) might be a basis • Path Selection and Admission Control • very key functionality • no candidate document so far • Inter-Layer Communication • For MPLS sublayers may be mostly informational • For non-MPLS layers very specific requirements can be stated • Not at a point requiring a one document per other non-MPLS layer

  6. CL Framework - Load Balance Specific • Dynamic Multipath Balance • Entirely local when paths can be asymmetric • Existing background partially explains existing techniques • Frequency of Load Balance • LSP requirement and link capability considered in path selection • Requirement signaled per LSP • LSP requirement checked at admission control time • Packet Ordering Requirements • Largely covered in mpls-tp-multipath documents • Greatly simplified by Entropy Label work (and ELI) • Minimally Disruption Load Balance • Informational - topic discussed on mailing list

  7. CL Framework - IP and LDP and PW • IP and LDP Traffic • Neither support traffic engineering • Traffic can be measured and accounted for • May be no viable preemption of IP or LDP • LDP Extensions • Can pass requirements and traffic characteristics • Information may be used to select a (local) component • Pseudowire Extensions • Can pass requirements and traffic characteristics • Information may be used to select a (local) component

  8. CL Framework - Review • Goal is to eventually move toward defining protocols • Proposes a set of documents to cover groups of related requirements • Need to agree that the set of topics is OK, and argue about the details when the documents appear

  9. Next Step • The WG draft will be updated after 84 • Welcome comments and feedbacks

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