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[IPFIX] Data type for srhSegmentIPv6LocatorLength in IPFIX Entities registry

Ahmed.Elhassany@swisscom.com Tue, 12 December 2023 08:42 UTC

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From: Ahmed.Elhassany@swisscom.com
To: ipfix@ietf.org
Thread-Topic: Data type for srhSegmentIPv6LocatorLength in IPFIX Entities registry
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Date: Tue, 12 Dec 2023 08:42:07 +0000
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Subject: [IPFIX] Data type for srhSegmentIPv6LocatorLength in IPFIX Entities registry
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Hello all,

I noticed IE 501 srhSegmentIPv6LocatorLength is recently added to the ipfix registry https://www.iana.org/assignments/ipfix/ipfix.xml without an abstract data type defined (in XML registry <dataType/>). I checked RFC 9487 that added this element to the registry, and it also doesn’t define an abstract data type for IE 501 srhSegmentIPv6LocatorLength.


This sound contradictory to RFC  7012 which states that:

dataType - One of the types listed in Section 3.1<https://www.rfc-editor.org/rfc/rfc7012.html#section-3.1> of this document or

      registered in the IANA "IPFIX Information Element Data Types"

      subregistry.

The implication for not putting a data type in the registry that automated code generators for parsing and handling IPFIX will not work. A user must intervene manually and read the references RFCs to figure out the appropriate data type to be used.

My question to the mailing list: Is my understanding for RFC7012 correct that a data type must be defined as one of IPFIX Information Element Data Types? And if so, I think we need to report an erratum for the RFC9487 and update the registry accordingly.


Best,
-Ahmed

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