RFC 2006 (rfc2006) - Page 3 of 52

The Definitions of Managed Objects for IP Mobility Support using SMIv2

RFC 2006          Mobile IP MIB Definition using SMIv2      October 1996


   (4)  Exclude objects which are simply derivable from others in this or
   other MIBs.

3.2.  Structure of the Mobile IP

   This section describes the basic model of Mobile IP used in
   developing the Mobile IP MIB. This information should be useful to
   the implementor in understanding some of the basic design decisions
   of the MIB.

   The Mobile IP Protocol introduces these new funtional entities:

   Mobile Node

      A host or router that changes its point of attachment from one
      network or subnetwork to another.  A mobile node may change its
      location without losing connectivity and without changing its IP
      address; it may continue to communicate with other Internet nodes
      at any location using its (constant) IP address, assuming link-
      layer connectivity to a point of attachment is available.

   Home Agent

      A router on a mobile node's home network which tunnels packets for
      delivery to the mobile node when it is away from home, and
      maintains current location information for the mobile node.

   Foreign Agent

      A router on a mobile node's visited network which provides routing
      services to the mobile node while registered.  The foreign agent
      detunnels and delivers packets to the mobile node that were
      tunneled by the mobile node's home agent. For datagrams sent by a
      mobile node, the foreign agent may serve as a default router for
      registered mobile nodes.

   This document specifies the objects used in managing these entities;
   namely, the Mobile Node, the Home Agent, and the Foreign Agent.













Cong, Hamlen & Perkins      Standards Track