Re: [OPSAWG] New Version Notification for draft-tgraf-opsawg-ipfix-inband-telemetry-01.txt

[[e-mail]]

Dear Greg,

Thanks a lot for the feedback and comments during OPSAWG and the conversation afterwards.

We are going to change the terminology from "Inband" to  "On-Path" Telemetry as per your suggestion to be inline with IPPM.

Regarding the term "Aggregation" in the slide deck. It refers to RFC 7015, IPFIX Flow Aggregation, where data is being aggregated during the metering process.

I reviewed draft-ietf-ippm-ioam-direct-export, RFC8321 and draft-ietf-ippm-rfc8321bis. I understood that the following sections are relevant for the data export
  
  In-situ OAM Direct Exporting
   https://datatracker.ietf.org/doc/html/draft-ietf-ippm-ioam-direct-export#section-3.1.2
   https://datatracker.ietf.org/doc/html/draft-spiegel-ippm-ioam-rawexport-06#section-3.1

  Alternate-Marking Method for Passive and Hybrid Performance Monitoring
   https://datatracker.ietf.org/doc/html/rfc8321#section-3.1.3
   https://datatracker.ietf.org/doc/html/draft-ietf-ippm-rfc8321bis-03#section-4.3
   https://datatracker.ietf.org/doc/html/draft-chen-ippm-ipfpm-report-01#section-4.4

None of the IPFIX identities are defiing a delay measurement. However they describe how timestamps can be exported. In order to ensure that the timestamp for every packet can be exposed, timestamps needs to be defined as flow key field (https://datatracker.ietf.org/doc/html/rfc7011#section-2). This however prevents IPFIX Flow Aggregation (RFC7015) due to the increased cardinality. In draft-tgraf-opsawg-ipfix-inband-telemetry, this is described in the use case section: https://datatracker.ietf.org/doc/html/draft-tgraf-opsawg-ipfix-inband-telemetry#section-4. Feel free to comment wherever this needs to be described more approprietly.

As you and also Benoit mentioned, draft-tgraf-opsawg-ipfix-inband-telemetry complements draft-ietf-ippm-ioam-direct-export, RFC8321 and draft-ietf-ippm-rfc8321bis. Looking forward for additional input to describe also this aspect.

Best wishes
Thomas

-----Original Message-----
From: OPSAWG <[e-mail]> On Behalf Of Benoit Claise
Sent: Thursday, July 28, 2022 3:02 PM
To: [e-mail]
Subject: [OPSAWG] FW: New Version Notification for draft-tgraf-opsawg-ipfix-inband-telemetry-01.txt

Dear all,

We posted a new version of this draft, which exports forwarding path delay in IPFIX.

The updated version includes multiple clarifications:
- the use case is better described
- the mapping between IPFIX Information Elements and Performance Metrics is explained
- It includes a figure displaying which forwarding path delay is actually exported
- We used a consistent terminology throughout the document
- the IANA considerations section is improved (and double-checked with the IANA rep. on site)

Your feedback is welcome, either on the mailing or during the presentation tomorrow.

Regards, Thomas, Alex, Benoit

-----Original Message-----
From: [e-mail] <[e-mail]> 
Sent: Thursday, July 28, 2022 10:44 AM
To: Alex Feng <[e-mail]>; Alex Huang Feng <[e-mail]>; Benoit Claise <[e-mail]>; Thomas Graf <[e-mail]>
Subject: New Version Notification for draft-tgraf-opsawg-ipfix-inband-telemetry-01.txt


A new version of I-D, draft-tgraf-opsawg-ipfix-inband-telemetry-01.txt
has been successfully submitted by Thomas Graf and posted to the IETF repository.

Name:		draft-tgraf-opsawg-ipfix-inband-telemetry
Revision:	01
Title:		Export of Forwarding Path Delay in IPFIX
Document date:	2022-07-28
Group:		Individual Submission
Pages:		21
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Abstract:
   This document introduces new IP Flow Information Export (IPFIX)
   information elements to expose the Inband Telemetry measured
   forwarding path delay on the IOAM transit and decapsulation nodes.

                                                                                  


The IETF Secretariat


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