Hi RFC Editors, Please see my reply inline. Thanks for your work!
Specially, authors, please review this modification proposal. OLD: Further, it should be noted that similar to handling of P and I flags in [RFC5440], the flag applies to full PCEP Object and could not be applied to the granularity of an optional TLVs encoded in the PCEP Object. NEW: This document does not modify the scope that P and I flags can be applied to, as defined in [RFC5440]. Therefore, these flags will only be applied to an entire PCEP object, and cannot be applied to the granularity of an optional TLVs encoded in the PCEP Object. Authors, please review this change. Thanks, Cheng -----Original Message----- From: rfc-edi...@rfc-editor.org <rfc-edi...@rfc-editor.org> Sent: Monday, March 10, 2025 7:24 AM To: Cheng Li <c...@huawei.com>; Zhenghaomian <zhenghaom...@huawei.com>; slitkows.i...@gmail.com Cc: rfc-edi...@rfc-editor.org; pce-...@ietf.org; pce-cha...@ietf.org; d...@dhruvdhody.com; r...@cert.org; auth48archive@rfc-editor.org Subject: Re: AUTH48: RFC-to-be 9753 <draft-ietf-pce-stateful-pce-optional-13> for your review Authors, While reviewing this document during AUTH48, please resolve (as necessary) the following questions, which are also in the XML file. 1) <!-- [rfced] Please insert any keywords (beyond those that appear in the title) for use on https://www.rfc-editor.org/search. --> [Cheng] PCEP, Stateful, optional processing 2) <!-- [rfced] We are having trouble parsing this sentence. Please consider whether the suggested text conveys the intended meaning. Original: [RFC5440] describes the handling of unknown objects as per the setting of the P flag for the PCReq message. Perhaps: Setting the P flag in the PCReq message to handle unknown objects is as described in Section 7.2 of [RFC5440]. --> [Cheng]OK 3) <!-- [rfced] Does marking something as optional allow the PCEP peer to ignore the object? If yes, may we update the text as follows? Original: In these cases, it would be useful to mark the objects as 'optional' and they could be ignored by the PCEP peer. Perhaps: In these cases, it would be useful to mark the objects as 'optional' so they could be ignored by the PCEP peer. --> [Cheng]OK 4) <!-- [rfced] We are having trouble parsing this text. It refers to the P and I flags, but then switches to "the flag". Does "the flag" refer to the R flag, which has not yet been introduced? Please review and let us know how the text may be clarified. Original (prior sentence included for context): Thus, this document specifies how the already existing P and I flags in the PCEP common object header could be used during the stateful PCEP message exchange. Further, it should be noted that similar to handling of P and I flags in [RFC5440], the flag applies to full PCEP Object and could not be applied to the granularity of an optional TLVs encoded in the PCEP Object. Perhaps: Further, it should be noted that, similar to handling of P and I flags in [RFC5440], the flag indicating that the constraint has been relaxed applies to the full PCEP object and cannot be applied at the granularity of an optional TLV encoded in the PCEP object. --> [Cheng]I do not think 'the flag' is correct here. It should not be the R flag, but the 'P and I flags'. After discussing with Dhruv, we confirm that we should use the flags(P and I flags). Please see the new text below. OLD: Further, it should be noted that similar to handling of P and I flags in [RFC5440], the flag applies to full PCEP Object and could not be applied to the granularity of an optional TLVs encoded in the PCEP Object. NEW: This document does not modify the scope that P and I flags can be applied to, as defined in [RFC5440]. Therefore, these flags will only be applied to an entire PCEP object, and cannot be applied to the granularity of an optional TLVs encoded in the PCEP Object. Authors, please review this change. 5) <!-- [rfced] PCUpd seems to be exapnded slightly differently in two places. Based on what we see in RFC 8231 (see below), we don't believe the terms are interchangeable. Please review and let us know how/if these should be made consistent? Perhaps Section 3.3.2 can just refer to PCUpd and PCInitiate since those terms are introduced earlier in the document? Section 1: Path Computation Update Request (PCUpd) This document defines a new flag, the R (RELAX) flag in STATEFUL-PCE-CAPABILITY TLV in the PCEP common object header to indicate a PCE speaker supporting P and I flags processing, and also specifies how the P and I flags could be used in the stateful PCE model to identify optional objects in the Path Computation State Report (PCRpt) [RFC8231], the Path Computation Update Request (PCUpd) [RFC8231], and the LSP Initiate Request (PCInitiate) [RFC8281] message. Section 3.3.2: LSP Update Request (PCUpd) The I flag in the PCRpt message [RFC8231] allows a PCC to indicate to a PCE whether or not an optional object was processed in response to an LSP Update Request (PCUpd) or LSP Initiate Request (PCInitiate). From RFC 8231: Path Computation Update Request (PCUpd) Section 6.2 of RFC 8231: A PCUpd message can carry more than one LSP Update Request. --> [Cheng]It takes few minutes to understand the problem. Ha, we can change LSP update request to PCUpd message, and LSP Initiate request to PCinit message. The purpose is not to emphasize the LSP, but the message. 6) <!-- [rfced] We are having trouble parsing this sentence. Please consider whether the suggested text is more clear. Otherwise, please clarify. Original: This document updates the handling of unknown objects in the stateful PCEP messages as per the setting of the P flag in the common object header in a similar way as [RFC5440], i.e. if a PCEP speaker does not understand an object with the P flag set or understands the object but decides to ignore the object, the entire stateful PCEP message MUST be rejected and the PCE MUST send a PCErr message with Error- Type="Unknown Object" or "Not supported Object" [RFC5440]. Perahps: This document updates the handling of unknown objects in the stateful PCEP messages by setting the P flag in the common object header in a similar way as described in [RFC5440]. That is, if a PCEP speaker does not understand an object with the P flag set, or if the PCEP speaker understands the object but decides to ignore the object, the entire stateful PCEP message MUST be rejected, and the PCE MUST send a PCErr message with Error- Type="Unknown Object" or "Not supported object" [RFC5440]. --> [Cheng]ok, thanks! Will avoid to use 'as per' next time, and try to make the subject of a sentence clear 😊 7) <!-- [rfced] Note that we have lowercased "object" when it appears as "PCEP object" to align with use in the referenced RFCs (e.g., 9753, 5440). Please let us know if any updates are needed. --> [Cheng]please follow the best practice, I am ok with lowercase or uppercase. Thanks. 8) <!-- [rfced] Please review the "Inclusive Language" portion of the online Style Guide <https://www.rfc-editor.org/styleguide/part2/#inclusive_language> and let us know if any changes are needed. Updates of this nature typically result in more precise language, which is helpful for readers. Note that our script did not flag any words in particular, but this should still be reviewed as a best practice. --> [Cheng]no change needed, thanks! I have review the diff file, the modification is ok to me. Thank you. RFC Editor On Mar 9, 2025, at 11:16 PM, rfc-edi...@rfc-editor.org wrote: *****IMPORTANT***** Updated 2025/03/09 RFC Author(s): -------------- Instructions for Completing AUTH48 Your document has now entered AUTH48. Once it has been reviewed and approved by you and all coauthors, it will be published as an RFC. If an author is no longer available, there are several remedies available as listed in the FAQ (https://www.rfc-editor.org/faq/). You and you coauthors are responsible for engaging other parties (e.g., Contributors or Working Group) as necessary before providing your approval. 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