RFC Errata
Found 1 record.
Status: Held for Document Update (1)
RFC 9350, "IGP Flexible Algorithm", February 2023
Source of RFC: lsr (rtg)
Errata ID: 7376
Status: Held for Document Update
Type: Editorial
Publication Format(s) : TEXT, PDF, HTML
Reported By: Nikolai Malykh
Date Reported: 2023-03-04
Held for Document Update by: John Scudder
Date Held: 2023-03-06
Section 6 says:
One of the limitations of IS-IS [ISO10589] is that the length of a TLV/sub-TLV is limited to a maximum of 255 octets. For the FAD sub- TLV, there are a number of sub-sub-TLVs (defined below) that are supported. For a given Flex-Algorithm, it is possible that the total number of octets required to completely define a FAD exceeds the maximum length supported by a single FAD sub-TLV. In such cases, the FAD MAY be split into multiple such sub-TLVs, and the content of the multiple FAD sub-TLVs are combined to provide a complete FAD for the Flex-Algorithm. In such a case, the fixed portion of the FAD (see Section 5.1) MUST be identical in all FAD sub-TLVs for a given Flex- Algorithm from a given IS.
It should say:
One of the limitations of IS-IS [ISO10589] is that the length of a TLV/sub-TLV is limited to a maximum of 255 octets. For the FAD sub- TLV, there are a number of sub-sub-TLVs (defined below) that are supported. For a given Flex-Algorithm, it is possible that the total number of octets required to completely define a FAD exceeds the maximum length supported by a single FAD sub-TLV. In such cases, the FAD MAY be split into multiple such sub-TLVs, and the content of the multiple FAD sub-TLVs are combined to provide a complete FAD for the Flex-Algorithm. In such a case, the fixed portion of the FAD (see Section 5.1) MUST be identical in all FAD sub-TLVs for a given Flex- Algorithm from a given IS (Intermediate System).
Notes:
Although "IS" is listed in https://www.rfc-editor.org/materials/abbrev.expansion.txt as well-known, this evidently confused at least one reader, so it seems worth expanding on first use. See also https://mailarchive.ietf.org/arch/msg/lsr/LICQJ8U3cBAY9Z1LHMfAI4v7xRg/