Hi Michael,
Thank you for the review.
The motivation was used as it was the key element in the discussion in Section 3.3.3 of RFC1122, but you made a fair comment.
==
DISCUSSION:
Picking the correct datagram size to use when sending data
is a complex topic [IP:9].
(a) In general, no host is required to accept an IP
datagram larger than 576 bytes (including header and
data), so a host must not send a larger datagram
without explicit knowledge or prior arrangement with
the destination host.
==
We can update the text as follows:
OLD:
assume a PMTU of 576 bytes for IPv4 datagrams, as every IPv4 host
must be capable of receiving a packet whose length is equal to 576
bytes as discussed in [RFC0791] and [RFC1122].
NEW:
assume a PMTU of 576 bytes for IPv4 datagrams (see Section 3.3.3 of [RFC1122]).
Cheers,
Med
> -----Message d'origine-----
> De : Michael Tüxen via Datatracker [mailto:noreply@xxxxxxxx]
> Envoyé : lundi 22 mars 2021 00:33
> À : tsv-art@xxxxxxxx
> Cc : dots@xxxxxxxx; draft-ietf-dots-rfc8782-bis.all@xxxxxxxx; last-
> call@xxxxxxxx
> Objet : Tsvart last call review of draft-ietf-dots-rfc8782-bis-05
>
> Reviewer: Michael Tüxen
> Review result: Ready with Nits
>
> This document has been reviewed as part of the transport area review
> team's ongoing effort to review key IETF documents. These comments
> were written primarily for the transport area directors, but are copied
> to the document's authors and WG to allow them to address any
> issues raised and also to the IETF discussion list for information.
>
> When done at the time of IETF Last Call, the authors should consider
> this review as part of the last-call comments they receive. Please
> always CC tsv-art@xxxxxxxx if you reply to or forward this review.
>
> >From a transport perspective, there is one minor issue:
> Section 7.3 provides a motivation for using a path MTU for IPv4 of 576
> bytes.
> The motivation refers to the requirement that a receiver is capable of
> receiving IPv4 packets of that size, however they can be received
> fragmented.
> While it is acceptable to use 576 bytes as the minimum PMTU, the
> motivation does not hold.
>
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