Last Call Review of draft-sweet-rfc2911bis-09
review-sweet-rfc2911bis-09-opsdir-lc-brownlee-2016-08-16-00

Hi all:

I have performed an Operations Directorate review of
   draft-sweet-rfc2911bis-10
   (note: the review request specified version -09)

Abstract:
  "The Internet Printing Protocol (IPP) is an application level protocol
   for distributed printing using Internet tools and technologies.  This
   document describes a simplified model consisting of abstract objects,
   attributes, and operations that is independent of encoding and
   transport.  The model consists of several objects including Printers
   and Jobs.  Jobs optionally support multiple Documents.

   IPP semantics allow End Users and Operators to query Printer
   capabilities, submit print Jobs, inquire about the status of print
   Jobs and Printers, and cancel, hold, and release print Jobs.  IPP
   semantics also allow Operators to pause and resume Jobs and Printers.

   Security, internationalization, and directory issues are also
   addressed by the model and semantics.  The IPP message encoding and
   transport are described in IPP/1.1: Encoding and Transport
   [RFC2910bis]."

This draft is a complete description of IPP, in sufficient detail
that implementors can create interworking implementations using
it.  It's a long - 218 pages - draft, but it's very clearly written;
I didn't have any difficulty in following it all the way through.

Since IPP is an application-level protocol, ISPs are unlikely to
have operational concerns about it.  However, network administrators,
indeed anyone who manages printers and printing, will need to
be sure that their printing systems conform to the same (preferably
the latest) version of IPP.

It's Intended status is Standards Track, and it
Obsoletes: 2911,3381,3382 (if approved); that seems fine.

It's IANA Considerations are limited to "for defining standards track
and vendor extensions to this document"; it doesn't give IANA any
instructions on creating its various IPP Registries.  However,
those Registries were created by RFC 2911, which this draft obsoletes.
Interestingly, it also obsoletes RFCs 3881 and 3882 - but IANA's
IPP Registries don't have any references to 3881 or 3882, which
seems odd.  Should its IANA Considerations sections request IANA
to update these registries?

The Security Considerations are clear, they discuss scenarios
for various deployments of IPP clients (Job creators and Printers).

Last, a minor quibble: Job Size units, e.g. on pp 53, 134-136, 156:
The units used for these are "K octets".  Now, k is the SI
abbreviation for kilo; "kilo-octets" would be a better way to say
this.

Cheers, Nevil

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 Nevil Brownlee                          Computer Science Department
 Phone: +64 9 373 7599 x88941             The University of Auckland
 FAX: +64 9 373 7453   Private Bag 92019, Auckland 1142, New Zealand