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To: "opsawg@ietf.org" <opsawg@ietf.org>,
	"draft-ietf-opsawg-ipfix-gtpu@ietf.org"
	<draft-ietf-opsawg-ipfix-gtpu@ietf.org>
Thread-Topic: I-D Action: draft-ietf-opsawg-ipfix-gtpu-00.txt
Thread-Index: AQHbInAnbCM6ge8rDUK699Q+YGf9DbKdvSgQ
Date: Tue, 29 Oct 2024 13:08:05 +0000
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Hi Authors, all, =


FWIW, you may find a review of this draft at:

* pdf: https://github.com/boucadair/IETF-Drafts-Reviews/blob/master/2024/dr=
aft-ietf-opsawg-ipfix-gtpu-00-rev%20Med.pdf
* doc: https://github.com/boucadair/IETF-Drafts-Reviews/raw/refs/heads/mast=
er/2024/draft-ietf-opsawg-ipfix-gtpu-00-rev%20Med.doc

Overall:

* The various IPFIX IEs are mirroring fields in the GTP-U header/packet. =

* Some of the IE names is unfortunate (e.g., use of flags to refer to the v=
ersion), but that's easy to fix. =

* Also, given that a flag is not assigned yet (?), I suggest that the text =
insists that the export is based on what is observed. The exporter has not =
to know the internal structure of the gtpuFlags for example.
* There might be IEs that might be useful here (length, tunnel peer, list o=
f extension headers, etc.). =

* The presence of some IEs depends on the flags setting. A check at the col=
lector side might be worth to elaborate (E, for example).
* For the use case section, I think some background is needed to digest the=
 examples. Some of this can be achieved by simple references to the bunch o=
f slicing drafts (see the explicit pointers provided in the review).
* The 3GPP spec include a case where tools to troubleshoot are important (e=
.g., zero udp checksum). I see a value in discussing how the use of the var=
ious IPFIX IEs can help here.
* Some more meaningful description text is needed for the various IEs.

Hope this helps.

Cheers,
Med

> -----Message d'origine-----
> De=A0: internet-drafts@ietf.org <internet-drafts@ietf.org>
> Envoy=E9=A0: samedi 19 octobre 2024 23:44
> =C0=A0: i-d-announce@ietf.org
> Cc=A0: opsawg@ietf.org
> Objet=A0: I-D Action: draft-ietf-opsawg-ipfix-gtpu-00.txt
> =

> =

> Internet-Draft draft-ietf-opsawg-ipfix-gtpu-00.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
>             Benoit Claise
>             Vyasraj Satyanarayana
>    Name:    draft-ietf-opsawg-ipfix-gtpu-00.txt
>    Pages:   13
>    Dates:   2024-10-18
> =

> Abstract:
> =

>    This document introduces IP Flow Information Export
> Information
>    Elements to identify 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://eur03.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2
> Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-opsawg-ipfix-
> gtpu%2F&data=3D05%7C02%7Cmohamed.boucadair%40orange.com%7C8d8b7e078
> 539435ab76b08dcf0874893%7C90c7a20af34b40bfbc48b9253b6f5d20%7C0%7C
> 0%7C638649711038172966%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMD
> AiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sda
> ta=3DvAylmMIQtL74sPvU1VlVZ9SAO5i61PVwnjIndrkuVrQ%3D&reserved=3D0
> =

> There is also an HTMLized version available at:
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> Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ietf-opsawg-ipfix-
> gtpu-
> 00&data=3D05%7C02%7Cmohamed.boucadair%40orange.com%7C8d8b7e07853943
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> 38649711038189162%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJ
> QIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=3DnN
> W3kre8QWivq8yXM4pXsIIrL1k1DoITLDE4vJ7UKSY%3D&reserved=3D0
> =

> Internet-Drafts are also available by rsync at:
> rsync.ietf.org::internet-drafts
> =

> =

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