Hi Matthew:

I am fine with all your explanations. Please seek guidance from your shepherd or AD with respect to the next steps.

     Miguel

BOCCI Matthew wrote:
Miguel,

Please see below.

Thanks
Matthew

-----Original Message-----
From: Miguel A. Garcia [mailto:[email protected]]
Sent: 20 May 2009 10:52
To: BOCCI Matthew; VIGOUREUX MARTIN; [email protected];
[email protected];
[email protected]; [email protected]; Loa Andersson;
[email protected]
Cc: General Area Review Team; [email protected]
Subject: Gen-ART review of draft-ietf-mpls-tp-gach-gal-05.txt

I have been selected as the General Area Review Team (Gen-ART)
reviewer for this draft (for background on Gen-ART, please see
http://www.alvestrand.no/ietf/gen/art/gen-art-FAQ.html).

Please resolve these comments along with any other Last Call comments
you may receive.

Document: draft-ietf-mpls-tp-gach-gal-05.txt
Reviewer: Miguel Garcia <[email protected]>
Review Date: 20-May-2005
IESG Telechat date:

Summary: The document is ready for publication as a standards track
RFC.
I reviewed version -04 of this document, and I had a number of minor
comments. Most of them have been solved, but still I need to comment
on a
few remaining minor issues.

Minor issues:

- Rule of 5 authors. The draft lists 6 authors, of which 2 of them are
listed as Editors. While this is not an impediment for its
publication,
certainly it brakes the RFC Editor's rule of 5 authors.

I'm waiting for guidance from Loa and Adrian on this one.
- In version 4 I had this comment:
   On Section 3.1, first paragraph, the text reads:

     The structure of ACH TLVs that
     MAY follow an ACH TLV Header is defined and described in the
     following sections.

I am not sure what the text wants to say, because it mean want to say
either:

a) The structure of ACH TLVs MAY follow an ACH TLV Header ...
b) The structure of ACH TLVs that can follow an ACH TLV Header ..

If the intention is a), then this text should be written in Section
3.3,
which is the section that describes the ACH TLV object. If the
intention
is b), then it is correctly placed, but please do use "can" instead of
"MAY".


The authors clarified that the intention was to express "a". Now in
version 5, the text has been moved to Section 3.3, which is the
correct
Section. However, I still have a problem with the wording "that MAY",
because I think it will cause confussion. The text is a restrictive
relative clause. I don't understand how normative text MAY can be
included in a restrictive relative clause, whose purpose is to
restrict
the set of ACH TLVs to only those who follow the ACH TLV header. I
will
argue that, as written, is unimplementable.

So, I suspect that you are trying to say the following (please review
carefully):

"ACH TLVs MAY follow an ACH TLV header. The structure of ACH TLVs that
follow an ACH TLV Header is defined and described in this section."

In the above paragraph, the first sentence express the optionality of
ACH
TLVs to follow or not an ACH TLV header. The second sentence says that
the rest of the section is devoted only to the subset of those ACH
TLVs
that follow an ACH TLV header. Nothing is said about ACH TLVs that do
not
follow an ACH TLV header.

What we are trying to say is the following. ACH TLVs may or may not
exist in a G-Ach. If they exist, ACH TLVs may only be placed after an
ACH TLV header. The structure of ACH TLVs is as follows...

So I think a slight modification to your proposed sentence clarifies the
point:

"ACH TLVs MAY follow an ACH TLV header. The structure of ACH TLVs is
defined and described in this section."

- New issue: there is a note at the end of Section 4.2.1.1.
Unfortunately, the note contains a normative statement (MUST).
Normative
statements are incompatible with the definition of a note, which
merely
adds some additional explanation to the text. I would suggest move the
sentence of the note that contains the normative statement outside the
note, in which case there might be a need for some introductory text.

In retrospect, I am not sure that I am comfortable with this sentence
either. The preceding sentence says "If this is not the targeted
destination, but the node has agreed to process packets on that ACH
channel, then the processing applied to the packet is out of scope of
this document." I think that the specifications for the individual
protocols that run in the G-ACh should say what to do next, so I would
prefer to remove the final sentence entirely.

- Typo in Section 4.2.1.2: s/MPLSsection/MPLS section

OK thanks


/Miguel

--
Miguel A. Garcia
+34-91-339-3608
Ericsson Spain

--
Miguel A. Garcia
+34-91-339-3608
Ericsson Spain

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