RFC 2569 (rfc2569) - Page 2 of 28

Mapping between LPD and IPP Protocols

RFC 2569         Mapping between LPD and IPP Protocols        April 1999


Abstract

   This document is one of a set of documents, which together describe
   all aspects of a new Internet Printing Protocol (IPP). IPP is an
   application level protocol that can be used for distributed printing
   using Internet tools and technologies. This document gives some
   advice to implementers of gateways between IPP and LPD (Line Printer
   Daemon). This document describes the mapping between (1) the commands
   and operands of the 'Line Printer Daemon (LPD) Protocol' specified in
   RFC 1179 and (2) the operations, operation attributes and job
   template attributes of the Internet Printing Protocol/1.0 (IPP).  One
   of the purposes of this document is to compare the functionality of
   the two protocols.  Another purpose is to facilitate implementation
   of gateways between LPD and IPP.

   WARNING: RFC 1179 was not on the IETF standards track.  While RFC
   1179 was intended to record existing practice, it fell short in some
   areas.  However, this specification maps between (1) the actual
   current practice of RFC 1179 and (2) IPP.  This document does not
   attempt to map the numerous divergent extensions to the LPD protocol
   that have been made by many implementers.

   The full set of IPP documents includes:

      Design Goals for an Internet Printing Protocol [RFC 2567]
      Rationale for the Structure and Model and Protocol for the
      Internet Printing Protocol [RFC 2568]
      Internet Printing Protocol/1.0: Model and Semantics [RFC 2566]
      Internet Printing Protocol/1.0: Encoding and Transport [RFC 2565]
      Internet Printing Protocol/1.0: Implementors Guide [ipp-iig]
      Mapping between LPD and IPP Protocols (this document)

   The document, "Design Goals for an Internet Printing Protocol", takes
   a broad look at distributed printing functionality, and it enumerates
   real-life scenarios that help to clarify the features that need to be
   included in a printing protocol for the Internet. It identifies
   requirements for three types of users: end users, operators, and
   administrators. It calls out a subset of end user requirements that
   are satisfied in IPP/1.0. Operator and administrator requirements are
   out of scope for version 1.0.

   The document, "Rationale for the Structure and Model and Protocol for
   the Internet Printing Protocol", describes IPP from a high level
   view, defines a roadmap for the various documents that form the suite
   of IPP specifications, and gives background and rationale for the
   IETF working group's major decisions.





Herriot, et al.               Experimental