RFC 1490 (rfc1490) - Page 1 of 35

Multiprotocol Interconnect over Frame Relay

Network Working Group                                        T. Bradley
Request for Comments: 1490               Wellfleet Communications, Inc.
Obsoletes: 1294                                                C. Brown
                                         Wellfleet Communications, Inc.
                                                               A. Malis
                                                   Ascom Timeplex, Inc.
                                                              July 1993


              Multiprotocol Interconnect over Frame Relay

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

   This memo describes an encapsulation method for carrying network
   interconnect traffic over a Frame Relay backbone.  It covers aspects
   of both Bridging and Routing.  Additionally, it describes a simple
   fragmentation procedure for carrying large frames over a frame relay
   network with a smaller MTU.

   Systems with the ability to transfer both the encapsulation method
   described in this document, and others must have a priori knowledge
   of which virtual circuits will carry which encapsulation method and
   this encapsulation must only be used over virtual circuits that have
   been explicitly configured for its use.

Acknowledgements

   Comments and contributions from many sources, especially those from
   Ray Samora of Proteon, Ken Rehbehn of Netrix Corporation, Fred Baker
   and Charles Carvalho of Advanced Computer Communications and Mostafa
   Sherif of AT&T have been incorporated into this document. Special
   thanks to Dory Leifer of University of Michigan for his contributions
   to the resolution of fragmentation issues and Floyd Backes from DEC
   and Laura Bridge from Timeplex for their contributions to the
   bridging descriptions. This document could not have been completed
   without the expertise of the IP over Large Public Data Networks
   working group of the IETF.






Bradley, Brown & Malis