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Document: draft-ietf-tsvwg-rfc4960-errata-06
Reviewer: Paul Kyzivat
Review Date: 2018-06-03
IETF LC End Date: 2018-06-04
IESG Telechat date: ?
Summary:
This draft is on the right track but has open issues, described in the
review.
Issues:
Major: 1
Minor: 2
Nits: 1
1) MAJOR:
The format of this document disturbs me. According to the abstract:
... This
document provides deltas to RFC4960 and is organized in a time
ordered way. The issues are listed in the order they were brought
up. Because some text is changed several times the last delta in the
text is the one which should be applied.
This format makes the document hard to deal with. A developer who wants
to implement sctp with some or all of the errata fixes will want to work
from a variant of 4960 that incorporates all of those fixes - a bis. But
it isn't clear how this document helps with that. I don't think you can
start with 4960 and simply apply all the deltas sequentially, because
overlapping changes won't work right.
A developer won't be interested in the order in which errata were
reported. An actual bis document would be more useful to a developer
than this format. Is that not being done because doing so would be more
difficult? Or because it isn't yet certain that these are the correct fixes?
I think you should give some serious consideration of the most suitable
form for this document, in the context of how it is intended to be used.
2) MINOR (maybe MAJOR):
Discovering where one change is impacted by another change is hard.
I dug into the details of the document to understand how many places
there are actually overlaps between the changes in multiple sections.
(It took a lot of work to do this.) I found five of these:
- 3.1 / 3.23
- 3.3 / 3.43
- 3.5 / 3.10
- 3.6 / 3.23
- 3.24 / 3.32
(I don't guarantee that this list is exhaustive.)
Of these, I think only one (3.1/3.23) explicitly indicates the conflict,
and it only indicates it within 3.23.
Most of the changes don't have any conflicts. And some of the conflicts
could be removed by being more precise in indicating the change being
made. In cases where this isn't possible, the presence of the conflict
should be indicated in each section that has a conflict, with cross
references. IOW, shift the burden of detecting conflicts from the reader
to the document.
3) MINOR:
Errata Tracking: Apparently each subsection of section 3 covers one
erratum. But the errata numbers are not mentioned. Each section ought to
reference the errata number it responds to.
4) NIT:
In section 3.35 (DSCP Changes) the change to section 10.1 isn't properly
indicated. It shows 'Old text' twice rather than 'Old text' and 'New text'.
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