Authors, While reviewing this document during AUTH48, please resolve (as necessary) the following questions, which are also in the source file.
1) <!-- [rfced] Please insert any keywords (beyond those that appear in the title) for use on https://www.rfc-editor.org/search. --> 2) <!-- [rfced] Capitalization for some of the TLV descriptions do not match the IANA registry. Should these match? It wasn't clear to us if you intentionally chose initial capitalization for all descriptions, regardless of what appears in the RFCs/registries. Examples: IANA vs document IS-IS Router CAPABILITY TLV vs Router Capability TLV (though "IS-IS Router CAPABILITY TLV" appears once in Section 7) Extended IS reachability vs Extended IS Reachability (outside of the IANA table) --> 3) <!-- [rfced] Presumably, the mechanism defined in this document would not be needed if the mechanims defined by RFC 7356 were backwards compatible (i.e., the existence of RFC 7356 does not resolve the problem). For clarity, we suggest the update below. Please review and clarify as needed. Original: [RFC7356] has defined a 16-bit length field for TLVs in flooding scoped Protocol Data Units (PDUs), in which case the problem addressed by this document would not exist. However, introduction of these new PDU types is not backwards compatible. Therefore, there is a need to address how to expand the information advertised in existing PDUs that use 8-bit length TLVs. Perhaps: [RFC7356] has defined a 16-bit length field for TLVs in flooding scoped Protocol Data Units (PDUs), but it is not backwards compatible. Therefore, there remains a need to address how to expand the information advertised in PDUs that use 8-bit TLVs. --> 4) <!-- [rfced] The text indicates that this mechanism is to be used in cases where no extension was previously specified and is to be used with future TLVs. Assuming "future TLVs" refers to only the TLVs with 8-bit TLVs, we suggest the following update. Please review. Original: This document specifies a means for extending TLVs where no extension mechanism has been previously explicitly specified, and defines this mechanism as the default extension mechanism for future TLVs. Perhaps: This document specifies a means for extending TLVs where no extension mechanism has been previously explicitly specified, and defines this mechanism as the default extension mechanism for future TLVs with an 8-bit length field. --> 5) <!-- [rfced] For clarity, may we update the text as follows? Original: Some TLVs support advertisement of objects of a given type, where each object is identified by a unique set of identifiers. In this case the "key" that uniquely identifies a given object consists of the set of identifiers. Perhaps: Some TLVs support advertisement of objects of a given type, where each object is identified by a unique set of identifiers, which is referred to as a "key". --> 6) <!-- [rfced] We added articles in Sections 3.2.1 and 3.2.2. Please review and let us know if any corrections are needed. --> 7) <!-- [rfced] We are having trouble parsing "transient" as a noun. Perhaps this should read "a transient issue" or "a transient error"? Original: Note that this can occur either legitimately as a transient when a TLV moves from one LSP to another or as a result of a defect in the sending implementation. --> 8) <!-- [rfced] Please review whether any of the notes in this document should be in the <aside> element. It is defined as "a container for content that is semantically less important or tangential to the content that surrounds it" (https://authors.ietf.org/en/rfcxml-vocabulary#aside). --> 9) <!-- [rfced] We wonder if the following update would help with readability. Original: The receiving router must then process this as having key information K and unique sub-TLVs A, B, C, D, E, F, or, because ordering is irrelevant, unique sub-TLVs D, E, F, A, B, C, or any other permutation. Perhaps - splitting this into two sentences: The receiving router must then process this as having key information K and unique sub-TLVs A, B, C, D, E, F. Because ordering is irrelevant, the sub-TLVs may appear in any order (e.g., D, E, F, A, B, C). --> 10) <!-- [rfced] We have updated the format of artwork in Section 7. Please let us know if you have any concerns. Original: MP-TLV Support for TLVs with implicit support Type 30 (suggested - to be assigned by IANA) 1 octet Length 0 1 octet Current: MP-TLV Support for TLVs with implicit support Type: 30 (1 octet) Length: 0 (1 octet) --> 11) <!-- [rfced] Please consider whether "per level" will be clear for the reader. Original: Scope of the associated Router Capability TLV is per level (S-bit clear). --> 12) <!-- [rfced] Please consider whether "implicit support" should be capitalized - that is, how should it appear in other documents that refer to this TLV? Note that we will ask IANA to update their registry as needed. MP-TLV Support for TLVs with implicit support --> 13) <!-- [rfced] Note that we have removed the URLs from each of the subsections in Section 9.2. The URLs would need to be reduced to the URL for the main registry group per IANA guidance, which is already mentioned in Section 9.2. We did not include any introductory text for the tables because the registry names are part of the section titles and table titles. Please review and let us know if you prefer that introductory text be added. --> 14) <!-- [rfced] We removed "TLV" from these entries to match what appears in the IANA registry. 126 IPv4 Algorithm Prefix Reachability TLV N 127 IPv6 Algorithm Prefix Reachability TLV N --> 15) <!-- [rfced] Table 4: Note that we updated the Unassigned values to be 33-255, as value 32 is assigned to "BIER Info". Original: | 32 | BIER Info | Y | | 32-255 | Unassigned | | --> 16) <!-- [rfced] We believe it is intentional that value 30, assigned to "MP-TLV Support for TLVs with implicit support" in this document, is not listed in Table 6. Please let us know if this is incorrect. Original: | 30-160 | Unassigned | | --> 17) <!-- [rfced] Note that we have updated the Description for Type 9 in Table 13 to match what appears in the IANA registry. Original: | 9 | IS-IS Threshold Metric | N | Current: | 9 | IS-IS Bandwidth Metric | N | --> 18) <!-- [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. --> Thank you. Sandy Ginoza RFC Production Center On Sep 29, 2025, at 9:30 PM, [email protected] wrote: *****IMPORTANT***** Updated 2025/09/29 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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Files ----- The files are available here: https://www.rfc-editor.org/authors/rfc9885.xml https://www.rfc-editor.org/authors/rfc9885.html https://www.rfc-editor.org/authors/rfc9885.pdf https://www.rfc-editor.org/authors/rfc9885.txt Diff file of the text: https://www.rfc-editor.org/authors/rfc9885-diff.html https://www.rfc-editor.org/authors/rfc9885-rfcdiff.html (side by side) Diff of the XML: https://www.rfc-editor.org/authors/rfc9885-xmldiff1.html Tracking progress ----------------- The details of the AUTH48 status of your document are here: https://www.rfc-editor.org/auth48/rfc9885 Please let us know if you have any questions. Thank you for your cooperation, RFC Editor -------------------------------------- RFC 9885 (draft-ietf-lsr-multi-tlv-19) Title : Multi-Part TLVs in IS-IS Author(s) : P. Kaneriya, T. Li, A. Przygienda, S. Hegde, L. 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