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Chapter 7 - Configuring Mobile IP
CHAPTER 7
Configuring Mobile IP
7
This chapter describes how to set up the bridge to serve as a mobile IP
home or foreign agent. It assumes you understand the concepts and configuration
necessary to use Mobile IP.
Mobile IP is a protocol that allows roaming across different IP subnets while
maintaining their original IP address. It requires a Mobile IP stack to be set up on
the client device as well. This IP stack is available from FTP corporation and
other IP stack vendors.
Each client is assigned an IP address and a home agent IP address by the
network administrator. The Home agent resides on the subnet for which
the client’s IP address is local.
When the client roams to a foreign subnet, it contacts a foreign agent on
that subnet, supplying its home agent address. The foreign agent contacts
the home agent with the client’s information. The home agent
begins relaying any packet found on its local LAN destined to the client’s
IP address first back to the foreign agent and from there back to the
client.