Éric Vyncke has entered the following ballot position for
draft-ietf-opsawg-tsvwg-udp-ipfix-12: No Objection

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COMMENT:
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# Éric Vyncke, INT AD, comments for draft-ietf-opsawg-tsvwg-udp-ipfix-12

Thank you for the work put into this document.

Thanks to Joe Touch for his int-dir reviews but also kudos to the authors for
reacting to Joe's issue about the SAFE/UNSAFE split and the normative reference
to draft-ietf-opsawg-ipfix-tcpo-v6eh. The I-D is now in much better shape.

Please find below some non-blocking COMMENT points (but replies would be
appreciated even if only for my own education).

Special thanks to Thomas Graf for the shepherd's detailed write-up including
the WG consensus and the justification of the intended status.

I hope that this review helps to improve the document,

Regards,

-éric

# COMMENTS (non-blocking)

## Link to draft-ietf-tsvwg-udp-options

There is a normative reference to draft-ietf-tsvwg-udp-options, so all is good,
but it might have been better to wait for draft-ietf-tsvwg-udp-options rather
than having to review this I-D without knowing what will be the published
specification of UDP options.

## Section 1

s/widely deployed in *operators* networks/widely deployed in networks/ IPFIX is
largely deployed outside of operators (in the sense if (I)SP) ;-)

s/The IE specified in Section 4.1 uses the new abstract data type defined/The
IE specified in Section 4.1 uses the new abstract data type *unsigned256*
defined/ ?

## Section 3

While is it nice for the reader to have a short description of UDP options, it
does not say anything about "Kind" as in `Options indicated by Kind values`...
So, the reader must anyway read the UDP options draft. Suggest adding a short
description of the Kind.

## SAFE or safe

This document uses both "safe" and "SAFE" for what seems the same concept.
Please select one writing everywhere to reduce confusion.

## Use of MUST w/o BCP14

There are a couple of "MUST" and "MUST NOT" in the text without any BCP14
template. This is OK, but the "MUST" is then equivalent to a "must", so suggest
either using only lower case "must" or including BCP14 template. The lowercase
"must" is anyway normative as it is part of a Proposed Standard but somehow
less defined as the BCP14 "MUST".

## Section 4.1

s/The bit is set to 1 if the corresponding safe UDP option is observed in the
Flow/The bit is set to 1 if the corresponding safe UDP option is observed *at
least once* in the Flow/

s/The bit is set to 0 if the option is *not* observed in the Flow./The bit is
set to 0 if the option is *never* observed in the Flow./

Same comment for the unsafe options in section 4.2

What about "UDP option extended format" ? I.e., where the Kind is expressed
over 2 octets. Suggest adding some text restricting the use of this I-D to only
"normal 1-octet Kind".

## Section 4.3

I am afraid that I do not understand what value to use based ont the
Description. Are the only allowed values: 127 and 254 ?



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