[Pals] Genart last call review of draft-ietf-pals-ethernet-cw-06

Reviewer: Brian Carpenter
Review result: Ready with Nits

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.

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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.