1 / 7

PCE WG , IETF 86th draft-zhang-pce-hierarchy-extensions-03

Extensions to Path Computation Element Communication Protocol (PCEP) for Hierarchical Path Computation Elements (PCE). PCE WG , IETF 86th draft-zhang-pce-hierarchy-extensions-03. F. Zhang (Huawei) Q. Zhao (Huawei) O. González de Dios (Telefonica I+D)

nancylewis
Download Presentation

PCE WG , IETF 86th draft-zhang-pce-hierarchy-extensions-03

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Extensions to Path Computation Element Communication Protocol (PCEP) for Hierarchical Path Computation Elements (PCE) PCEWG, IETF 86th draft-zhang-pce-hierarchy-extensions-03 F. Zhang (Huawei) Q. Zhao (Huawei) O. González de Dios (Telefonica I+D) R. Casellas (CTTC) D. King(Old Dog Consulting)

  2. Differences from -02 • Restructuration and rewriting of document. • Editorial changes: • Section on Extensions. • Component (e.g. Open Object). • Protocol Structure (encoding, Flags, TLVs) • Procedure (specific to this component). • Section on H-PCE procedures (general for H-PCE). • Section on Error Handling • Scope of document revisited. • Functions out of scope removed. • NO-PATH new reasons added.

  3. Scope of the document • The scope of the extensions has been clarified. • Functions out of scope of the document: • Finding end point addresses; • Parent Traffic Engineering Database (TED) methods; • Domain connectivity; • All extensions aimed at implementing those functions have been removed from this document. • Inter-domain Node TLV, Inter-domain Link TLV, Reachability TLV, Destination Domain Query.

  4. H-PCE procedures • Two H-PCE procedures are defined in the document: • OPEN Procedure between Child PCE and Parent PCE • Procedure to obtain Domain Sequence

  5. New NO-PATH reasons • NO-PATH object can be used to communicate the reason(s) for not being able to find a multi- domain path or domain sequence • Three new bit flags are defined to be carried in the Flags field in the NO-PATH-VECTOR TLV carried in the NO-PATH Object: • Destination domain unknown • Un-responsive child PCE(s) • No available resources in one or more domain(s)

  6. OPEN points • OF/Metrics • Need to qualify what applies to end-to-end segment • Additional OF codes needed? • Error codes and handling • Additional information (e.g. non-responding PCE)? • Management, Policy & Security

  7. Next Steps • Receive feedback! • This solution document could be adopted as WG document for a solution of the framework document.

More Related