Xian, The idea of only doing an incremental sync is very useful, I think the requirements are valid for cases where large dbs are involved. As Jon mentioned, it is not applicable to all scenarios, and one must always weight the cost in extra complexity vs the benefit.
My original email was to make sure the wg is aware of the other sync-related changes in the stateful pce draft, since I don’t think many people have had a chance to read the draft. The draft might want to expand on how to determine what is missing, correlation between version db and srp-id-numbers or other mechanisms to avoid having to keep unbounded state for the purpose of cross-checking, errors in this process and recovery from them. Thanks, Ina -----Original Message----- From: Zhangxian (Xian) [mailto:zhang.x...@huawei.com] Sent: Tuesday, July 09, 2013 12:33 AM To: Ina Minei Cc: pce@ietf.org Subject: Re: [Pce] FW: New Version Notification for draft-zhx-pce-stateful-lsp-sync-00.txt Hi, Ina, Yes; we are aware of this and so from protocol extensions point of view, this draft does follow the use of related flags defined there. However, the intention of these two PCE-triggered action are different. In this new draft, it aims to allow the PCE to control the timing of LSP state synchronization (even before its LSP DB is up-to-date) across PCEP sessions. While in draft-ietf-pce-stateful-pce-05 intends to allow sanity check by PCE after the stateful PCE is fully functional (aka with full LSP-DB). What do you think of the draft itself? Do you think the requirements are valid? Regards, Xian ________________________________________ 发件人: Ina Minei [i...@juniper.net] 发送时间: 2013年7月9日 3:48 到: Zhangxian (Xian); pce@ietf.org 主题: RE: [Pce] FW: New Version Notification for draft-zhx-pce-stateful-lsp-sync-00.txt One minor comment for those of you who might be reviewing this draft, please be aware that Pce-triggered sync is also covered in http://tools.ietf.org/html/draft-ietf-pce-stateful-pce-05#section-5.5.4 (though the entire database is exchanged in that case). Ina -----Original Message----- From: pce-boun...@ietf.org [mailto:pce-boun...@ietf.org] On Behalf Of Zhangxian (Xian) Sent: Monday, July 08, 2013 2:59 AM To: pce@ietf.org Subject: [Pce] FW: New Version Notification for draft-zhx-pce-stateful-lsp-sync-00.txt Hi, Dear PCErs, We have just upload a new draft specifying the need in PCEP to allow incremental LSP state synchronization as well as PCE control over this process for stateful PCE(s). It also proposes PCEP extensions to support the requirements. Any comments/feedback are appreciated. Regards, Xian ( on behalf of all authors) ________________________________________ 发件人: internet-dra...@ietf.org [internet-dra...@ietf.org] 发送时间: 2013年7月7日 19:41 到: Zhangxian (Xian); Xiegang (A); Dhruv Dhody 主题: New Version Notification for draft-zhx-pce-stateful-lsp-sync-00.txt A new version of I-D, draft-zhx-pce-stateful-lsp-sync-00.txt has been successfully submitted by Xian Zhang and posted to the IETF repository. Filename: draft-zhx-pce-stateful-lsp-sync Revision: 00 Title: LSP Synchronization for Stateful Path Computation Element (PCE) Creation date: 2013-07-05 Group: Individual Submission Number of pages: 7 URL: http://www.ietf.org/internet-drafts/draft-zhx-pce-stateful-lsp-sync-00.txt Status: http://datatracker.ietf.org/doc/draft-zhx-pce-stateful-lsp-sync Htmlized: http://tools.ietf.org/html/draft-zhx-pce-stateful-lsp-sync-00 Abstract: The Path Computation Element Communication Protocol (PCEP) provides mechanisms for Path Computation Elements (PCEs) to perform path computations in response to Path Computation Clients (PCCs) requests. [Stateful-pcep] specifies a set of extensions to PCEP to enable stateful control of MPLS-TE and GMPLS Label Switched Paths (LSPs) via PCEP and maintaining of these LSPs at the stateful PCE. This document describes the mechanisms for incremental LSP Database (LSP- DB) synchronization as well as PCE control of the LSP-DB synchronization process. The IETF Secretariat _______________________________________________ Pce mailing list Pce@ietf.org https://www.ietf.org/mailman/listinfo/pce _______________________________________________ Pce mailing list Pce@ietf.org https://www.ietf.org/mailman/listinfo/pce
