[OPSAWG]Re: I-D Action: draft-ietf-opsawg-ipfix-gtpu-03.txt

[[e-mail]]

Hi Sriram, all,

Thank you for taking care of some of the comments I raised in my review. I checked the 00/03 diff and I think that the text is improved. I do still think that we need some discussion on the pending points:


  *   Should we add a statement about the base 3GPP release used to define the IEs?
  *   Is it worth to also report the extension header chain? Also, the peer tunnel endpoint?
  *   gtpuFlags
     *   This also cover the version. Not sure «flags» is accurate here. A better name is needed if the version is also included.
     *   (5.1 description) I would say this corresponds to the first byte of the header. The internal structure may change in the future (associate a meaning with the remaining bit, etc.). The current description may be stale then.
     *   I would insist that the bits are exported as observed. This allows, for example, to export the current unassigned bit even if no meaning is associated with it yet.



  *   As the header length is variable, is it worth to also export the length as a separate IE?
  *   At the collector side, the presence of this IE when the S bit is unset should be handled as an anomaly. I would add some text to cover this. Also, indicate which one takes precedence.
  *   pdutype: I like the new text (s/presense/presence, though). However, I would be more explicit that if this IE is present when E bit is not set is considered as an anomaly. In such case, which information takes precedence?
  *   Can we cover how IPFIX can help to cover: «When using GTP-U over IPv6 (see IETF RFC 8200 [36]), the UDP checksum shall not be set to zero by the sending GTP-U entity unless it is ensured that the peer GTP-U entity and the path in-between supports UDP zero checksum. NOTE 1: GTP-U entities complying with an earlier version of the specification or on path IPv6 middleboxes can implement IPv6 as specified in IETF RFC 2460 [15] and discard UDP packets containing a zero checksum. »
  *   What is an “intermediate UPF”?
  *   “or Uplink Classifier”: This corresponds to which entity in the 3GPP architecture?

Cheers,
Med

De : Sriram Gopalakrishnan (sriragop) <sriragop=[e-mail]>
Envoyé : jeudi 9 janvier 2025 10:46
À : [e-mail]; [e-mail]
Cc : [e-mail]; Dan-work Voyer <[e-mail]>; [e-mail]
Objet : [OPSAWG]Re: I-D Action: draft-ietf-opsawg-ipfix-gtpu-03.txt

Hello OPSAWG

I have uploaded the -03 version of the draft. The update includes

1) changes to IE description in Section 5.

2) fixed this error – ‘** Downref: Normative reference to an Informational RFC: RFC 6459’. Moved it to Informative reference



Please find the diff attached since last version.



Thanks

--Sriram

From: [e-mail]<mailto:[e-mail]> <[e-mail]<mailto:[e-mail]>>
Date: Thursday, 9 January 2025 at 2:57 PM
To: [e-mail]<mailto:[e-mail]> <[e-mail]<mailto:[e-mail]>>
Cc: [e-mail]<mailto:[e-mail]> <[e-mail]<mailto:[e-mail]>>
Subject: [OPSAWG]I-D Action: draft-ietf-opsawg-ipfix-gtpu-03.txt
Internet-Draft draft-ietf-opsawg-ipfix-gtpu-03.txt is now available. It is a
work item of the Operations and Management Area Working Group (OPSAWG) WG of
the IETF.

   Title:   Export of GTP-U Information in IP Flow Information Export (IPFIX)
   Authors: Daniel Voyer
            Sriram Gopalakrishnan
            Thomas Graf
            Vyasraj Satyanarayana
   Name:    draft-ietf-opsawg-ipfix-gtpu-03.txt
   Pages:   14
   Dates:   2025-01-09

Abstract:

   This document introduces IP Flow Information Export (IPFIX)
   Information Elements to report information contained in the Generic
   Packet Radio Service Tunneling Protocol User Plane header such as
   Tunnel Endpoint Identifier, and data contained in its session
   container extension header.

The IETF datatracker status page for this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-opsawg-ipfix-gtpu/

There is also an HTMLized version available at:
https://datatracker.ietf.org/doc/html/draft-ietf-opsawg-ipfix-gtpu-03

A diff from the previous version is available at:
https://author-tools.ietf.org/iddiff?url2=draft-ietf-opsawg-ipfix-gtpu-03

Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts


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