RFC 1356 (rfc1356) - Page 1 of 14


Multiprotocol Interconnect on X



Alternative Format: Original Text Document



Network Working Group                                           A. Malis
Request for Comments: 1356                            BBN Communications
Obsoletes: RFC 877                                           D. Robinson
                                      Computervision Systems Integration
                                                              R. Ullmann
                                            Process Software Corporation
                                                             August 1992


                       Multiprotocol Interconnect
                  on X.25 and ISDN in the Packet Mode

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 document specifies the encapsulation of IP and other network
   layer protocols over X.25 networks, in accordance and alignment with
   ISO/IEC and CCITT standards.  It is a replacement for RFC 877, "A
   Standard for the Transmission of IP Datagrams Over Public Data
   Networks" [1].

   It was written to correct several ambiguities in the Internet
   Standard for IP/X.25 (RFC 877), to align it with ISO/IEC standards
   that have been written following RFC 877, to allow interoperable
   multiprotocol operation between routers and bridges over X.25, and to
   add some additional remarks based upon practical experience with the
   specification over the 8 years since that RFC.

   The substantive change to the IP encapsulation is an increase in the
   allowed IP datagram Maximum Transmission Unit from 576 to 1600, to
   reflect existing practice.

   This document also specifies the Internet encapsulation for
   protocols, including IP, on the packet mode of the ISDN.  It applies
   to the use of Internet protocols on the ISDN in the circuit mode only
   when the circuit is established as an end-to-end X.25 connection.








Malis, Robinson, & Ullmann