Mobile IP and TCP/IP Address Resolution Protocol (ARP) Operation

Mobile IP is a protocol that does a good job of implementing a difficult function: It transparently allows an IP device to travel to a different network. Unfortunately, a problem with any protocol that tries to change how IP works is dealing with special cases. Having a home agent intercept datagrams and tunnel them to the mobile node works well in general terms, but there are some instances in which extra work is required. One of these is the use of ARP, which breaks under Mobile IP unless we take special steps.


BACKGROUND INFORMATION Some understanding of how ARP works in general terms is assumed in this topic. This includes ARP proxying, which is described in Chapter 13.

To understand ...

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