HP-UX IPSec version A.02.01 Administrator's Guide

HP-UX IPSec and HP-UX Mobile IPv6
Introduction
Appendix F280
Home Agent
The Mobile Node registers its Care-of Address with a router on the
Mobile Node’s home network, known as the Home Agent (HA). The
Home Agent maintains a record of the association, or binding of the
Mobile Node’s current Care-of Address and its home address. The Home
Agent also forwards packets addressed to the Mobile Node’s home
address to the Mobile Node’s Care-of Address as needed.
Home Agents and Basic Operation
In Mobile IPv6 Basic Operation, the Correspondent Node sends
data-packets to the Mobile Node using the Mobile Node’s home address.
A Home Agent (HA), a node or router on the Mobile Node’s home
network, intercepts these data-packets and sends them through an IPsec
tunnel to the Mobile Node’s current Care-of Address, as shown in
Figure F-1.
Figure F-1 Mobile IPv6 Basic Operation: Correspondent Node to Mobile
Node
The Mobile Node sends data packets to the Correspondent Node through
its Home Agent in Basic Operation, as shown in Figure F-2.