RFC 1638 (rfc1638) - Page 1 of 28

PPP Bridging Control Protocol (BCP)

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Network Working Group                                           F. Baker
Request For Comments: 1638                                           ACC
Category: Standards Track                                       R. Bowen
                                                                     IBM
                                                                 Editors
                                                               June 1994


                  PPP Bridging Control Protocol (BCP)

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   The Point-to-Point Protocol (PPP) [6] provides a standard method for
   transporting multi-protocol datagrams over point-to-point links.  PPP
   defines an extensible Link Control Protocol, and proposes a family of
   Network Control Protocols for establishing and configuring different
   network-layer protocols.

   This document defines the Network Control Protocol for establishing
   and configuring Remote Bridging for PPP links.

Table of Contents

     1.     Historical Perspective ................................    2
     2.     Methods of Bridging ...................................    3
        2.1       Transparent Bridging ............................    3
        2.2       Remote Transparent Bridging .....................    3
        2.3       Source Routing ..................................    4
        2.4       Remote Source Route Bridging ....................    5
        2.5       SR-TB Translational Bridging ....................    6
     3.     Traffic Services ......................................    6
        3.1       LAN Frame Checksum Preservation .................    6
        3.2       Traffic having no LAN Frame Checksum ............    6
        3.3       Tinygram Compression ............................    7
        3.4       LAN Identification ..............................    7
     4.     A PPP Network Control Protocol for Bridging ...........    9
        4.1       Sending Bridge Frames ...........................   10
           4.1.1  Maximum Receive Unit Considerations .............   10
           4.1.2  Loopback and Link Quality Monitoring ............   11
           4.1.3  Message Sequence ................................   11



Baker & Bowen
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