datatracker.ietf.org
Sign in
Version 5.3.1, 2014-04-16
Report a bug

The PPP OSI Network Layer Control Protocol (OSINLCP)
RFC 1377

Document type: RFC - Proposed Standard (November 1992)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Document shepherd: No shepherd assigned

IESG State: RFC 1377 (Proposed Standard)
Responsible AD: (None)
Send notices to: No addresses provided

Network Working Group                                            D. Katz
Request for Comments: 1377                                         cisco
                                                           November 1992

          The PPP OSI Network Layer Control Protocol (OSINLCP)

Status of this Memo

   This RFC specifies an IAB standards track protocol for the Internet
   community, and requests discussion and suggestions for improvements.
   Please refer to the current edition of the "IAB Official Protocol
   Standards" for the standardization state and status of this protocol.
   Distribution of this memo is unlimited.

Abstract

   The Point-to-Point Protocol (PPP) [1] provides a standard method of
   encapsulating Network Layer protocol information over point-to-point
   links.  PPP also defines an extensible Link Control Protocol, and
   proposes a family of Network Control Protocols (NCPs) for
   establishing and configuring different network-layer protocols.

   This document defines the NCP for establishing and configuring OSI
   Network Layer Protocols.

   This memo is the product of the Point-to-Point Protocol Working Group
   of the Internet Engineering Task Force (IETF).  Comments on this memo
   should be submitted to the ietf-ppp@ucdavis.edu mailing list.

Table of Contents

   1.     Introduction ..........................................    2
   1.1    OSI Network Layer Protocols over PPP ..................    2
   2.     A PPP Network Control Protocol (NCP) for OSI ..........    5
   2.1    Sending OSI NPDUs .....................................    6
   2.2    NPDU Alignment ........................................    6
   2.3    Network Layer Addressing Information ..................    6
   3.     OSINLCP Configuration Options .........................    7
   3.1    Align-NPDU ............................................    7
   REFERENCES ...................................................    9
   ACKNOWLEDGEMENTS .............................................    9
   SECURITY CONSIDERATIONS ......................................   10
   CHAIR'S ADDRESS ..............................................   10
   AUTHOR'S ADDRESS .............................................   10

Katz                                                            [Page 1]
RFC 1377                      PPP OSINLCP                  November 1992

1.  Introduction

   PPP has three main components:

      1. A method for encapsulating datagrams over serial links.

      2. A Link Control Protocol (LCP) for establishing, configuring,
         and testing the data-link connection.

      3. A family of Network Control Protocols (NCPs) for establishing
         and configuring different network-layer protocols.

   In order to establish communications over a point-to-point link, each
   end of the PPP link must first send LCP packets to configure and test
   the data link.  After the link has been established and optional
   facilities have been negotiated as needed by the LCP, PPP must send
   NCP packets to choose and configure one or more network-layer
   protocols.  Once each of the chosen network-layer protocols has been
   configured, datagrams from each network-layer protocol can be sent
   over the link.

   The link will remain configured for communications until explicit LCP
   or NCP packets close the link down, or until some external event
   occurs (an inactivity timer expires or network administrator
   intervention).

1.1.  OSI Network Layer Protocols over PPP

   A number of protocols have been defined for the Network Layer of OSI,
   including the Connectionless Network Layer Protocol (CLNP, ISO 8473)
   [3], the End System to Intermediate System routing protocol (ES-IS,
   ISO 9542) [4], the Intermediate System to Intermediate System routing
   protocol (IS-IS, ISO 10589) [5], and the Inter-Domain Routeing
   Protocol (IDRP, CD 10747) [6].  Generally, these protocols were
   designed to run over non-reliable data link protocols such as PPP.

   Network Layer Protocol Identifier (NLPID)

      OSI Network Layer protocols can be discriminated according to the
      first octet in each Network Protocol Data Unit (NPDU, that is,
      packet), known as the Network Layer Protocol Identifier (NLPID),
      which is defined in ISO/TR 9577 [7].  This allows the various
      protocols to be run over a common data link without any
      discriminator below the network layer.

Katz                                                            [Page 2]
RFC 1377                      PPP OSINLCP                  November 1992

   Inactive Network Layer Protocol

      ISO/TR 9577 reserves a NLPID value of zero to represent the
      "Inactive Network Layer Protocol", as defined in ISO 8473.  The

[include full document text]