Last Call Review of draft-ietf-pals-ethernet-cw-06
review-ietf-pals-ethernet-cw-06-genart-lc-carpenter-2018-06-11-00

Request Review of draft-ietf-pals-ethernet-cw
Requested rev. no specific revision
Type Last Call Review
Team General Area Review Team (Gen-ART) (genart)
Deadline 2018-06-15
Requested 2018-06-01
Other Reviews Rtgdir Last Call review of -05 by Harish Sitaraman (diff)
Secdir Last Call review of -06 by Alan DeKok
Review State Completed
Reviewer Brian Carpenter
Review review-ietf-pals-ethernet-cw-06-genart-lc-carpenter-2018-06-11
Posted at https://mailarchive.ietf.org/arch/msg/gen-art/kPUUppK4YyvP4L3OaLZKht-XEYc
Reviewed rev. 06
Review result Ready with Nits
Draft last updated 2018-06-11
Review completed: 2018-06-11

Review
review-ietf-pals-ethernet-cw-06-genart-lc-carpenter-2018-06-11

Gen-ART Last Call review of draft-ietf-pals-ethernet-cw-06

I am the assigned Gen-ART reviewer for this draft. The General Area
Review Team (Gen-ART) reviews all IETF documents being processed
by the IESG for the IETF Chair.  Please treat these comments just
like any other last call comments.

For more information, please see the FAQ at
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Document: draft-ietf-pals-ethernet-cw-06.txt
Reviewer: Brian Carpenter
Review Date: 2018-06-12
IETF LC End Date: 2018-06-15
IESG Telechat date: 2018-06-21

Summary: Ready with nits
--------

Comments: 
---------

This (with RFC4928) is a wonderful example of why layer violations are a Bad Thing.

Nits:
-----

> 1.  Introduction
...
>   This document recommends the use of the Ethernet pseudowire control
>   word in all but exceptional circumstances.

That's wrong, it *mandates* this usage with a MUST (first paragraph of section 4).

> 3.  Background
...
>   A recent posting on the Nanog email list has highlighted this
>   problem:
>
>   https://mailman.nanog.org/pipermail/nanog/2016-December/089395.html

No, it's no longer recent. How about:

   For example, a posting on the Nanog email list highlighted this
   problem:

> 7.  Operational Considerations
>
>   CW presence on the PW is controlled by the configuration and may be
>   subject to default operational mode of not being enabled. 

That sentence is hard to parse. Try this:

   A configuration switch might determine whether the CW is used on the PW. 
   The default configuration might be to disable use of the CW.