[Pals] Benoit Claise's No Objection on draft-ietf-pals-status-reduction-04: (with COMMENT)

[Benoit Claise <[e-mail]>]

Benoit Claise has entered the following ballot position for
draft-ietf-pals-status-reduction-04: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-pals-status-reduction/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

As mentioned by Jürgen in his OPS-DIR review:

Section 1.2 is not really about terminology but instead it basically
expands acronyms. The section does not define any terms or does it
make it clear where terms are defined. A reader who does not know
T-PE
will not be pointed to a document that defines 'Terminating Provider
Edge Node of MS-PW'. I usally find terminology sections more useful
if
they say where definitions of terms get be found.

Section 3: s/the the/the/

Section 4: What is the 'Version' field in the message format?

Section 4: There is an 8-bit field marked U C Flags and I _assume_
the
U and C bits are the 'first' two bits and the 'remaining bits are the
flags managed by IANA. Perhaps make this clearer, e.g.:

   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Last Received Seq Number     | Message Type  |U|C|   Flags   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

Or alternatively simply name the entire 8-bit flags field like you do
in the text where you refer to Message Flags and then explain in the
text under the 'Message Flags' that the first two bits have a fixed
meaning.

   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |  Last Received Seq Number     | Message Type  | Message Flags |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

This option carries less information but then you use 'Message Flags'
in several places and you also request an IANA registry for Message
Flags where the U and C bit are allocated. Looking at the IANA text,
it says 'bit position' 0 and 1. Not sure this is clear enough, you
seem to number bits in the order 0, 1, 2, ...

It turns out we have several slightly different labels further down
in
the document for this flags field throughout the document - this
makes
searching in the text difficult, please use a single consistent name
for this message field.

Section 8.2 says values 1 and 2 are defined in this document but then
it seems value 3 is also allocated, no?

Subsections of section 8 switches several times between decimal and
hexadecimal numbers. Perhaps things get clearer if a single number
system (e.g., hexadecimal) is used when talking about a specific
registry. Numbers like 134,217,728 look somewhat confusing, 0x8000000
seems simpler.