PPP Network Control Protocol for LAN Extension
RFC 1841

Document Type RFC - Informational (September 1995; No errata)
Last updated 2013-03-02
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Network Working Group                                         J. Chapman
Request For Comments: 1841                           Cisco Systems, Inc.
Category: Informational                                          D. Coli
                                                     Cisco Systems, Inc.
                                                               A. Harvey
                                                     Cisco Systems, Inc.
                                                               B. Jensen
                                                     Cisco Systems, Inc.
                                                               K. Rowett
                                                     Cisco Systems, Inc.
                                                          September 1995

            PPP Network Control Protocol for LAN Extension

Status of Memo

   This memo provides information for the Internet community.  This memo
   does not specify an Internet standard of any kind.  Distribution of
   this memo is unlimited.

Abstract

   Telecommunications infrastructure is improving to offer higher
   bandwidth connections at lower cost. Access to the network is
   changing from modems to more intelligent devices. This informational
   RFC discusses a PPP Network Control Protocol for one such intelligent
   device. The protocol is the LAN extension interface protocol.

Table of Contents

   1.0    Introduction ...........................................    3
      1.1   LAN Extension Interface Topology .....................    4
      1.2   LAN Extension Interface Architecture .................    5
      1.3   LAN Extension Interface Protocol .....................    6

   2.0    LAN Extension Interface Protocol Control Packets........    8
      2.1   Startup Options ......................................    8
      2.2   Remote Command Options ...............................   14
      2.3   Conditions for Sending PPP-LEX Packet ................   17

   3.0    Filter Protocol Type ...................................   18
      3.1   LEX_RCMD_REQUEST - Filter Protocol Type...............   19
      3.2   Response Packets - Filter Protocol Type...............   21

   4.0    Filter MAC Address .....................................   22
      4.1   LEX_RCMD_REQUEST - Filter MAC Address ................   23
      4.2   Response Packets - Filter MAC Address.................   25

Chapman, et al               Informational                      [Page 1]
RFC 1841           LAN Extension Interface Protocol       September 1995

   5.0    Set Priority ...........................................   27
      5.1   LEX_RCMD_REQUEST - Set Priority ......................   27
      5.2   Response Packets - Set Priority ......................   29

   6.0    Disable LAN Extension Ethernet Interface ...............   30
      6.1   LEX_RCMD_REQUEST - Disable LAN Extension
            Ethernet Interface ...................................   31
      6.2   Response Packets - Disable LAN Extension
            Ethernet Interface ...................................   32

   7.0    Enable LAN Extension Ethernet Interface ................   33
      7.1   LEX_RCMD_REQUEST - Enable LAN Extension
            Ethernet Interface ...................................   33
      7.2   Response Packets - Enable LAN Extension
            Ethernet Interface ...................................   34

   8.0    Reboot LAN Extension Interface Unit ....................   35
      8.1   LEX_RCMD_REQUEST - Reboot LAN Extension Interface
            Unit .................................................   35
      8.2   Response Packets - Reboot LAN Extension
            Interface Unit .......................................   36

   9.0    Request Statistics .....................................   37
      9.1   LEX_RCMD_REQUEST - Request Statistics ................   37
      9.2   LEX_RCMD_ACK - Request Statistics ....................   39
      9.3   LEX_RCMD_NAK/LEX_RCMD_REJ - Request Statistics .......   44

   10.0    Download Request ......................................   45
      10.1   LEX_RCMD_REQUEST - Download Request .................   46
      10.2   Response Packets - Download Request..................   48

   11.0    Download Data .........................................   49
      11.1   LEX_RCMD_REQUEST - Download Request .................   49
      11.2   Response Packets - Download Data ....................   51

   12.0    Download Status .......................................   52
      12.1   LEX_RCMD_REQUEST - Download Status ..................   53
      12.2   LEX_RCMD_ACK - Download Status ......................   54
      12.3   LEX_RCMD_NAK/LEX_RCMD_REJ - Download Status .........   56

   13.0    Inventory Request .....................................   56
      13.1   LEX_RCMD_REQUEST - Inventory Request ................   57
      13.2   LEX_RCMD_ACK - Inventory Request ....................   58
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