Mobile IP Administration Guide

Multicast Datagram Routing

To receive multicasts, a mobile node joins the multicast group in one of the following ways:

A mobile node that sends datagrams to a multicast group also has the following options:

Multicast routing depends on the IP source address. Therefore, a mobile node that sends multicast datagrams directly on the visited network uses a co-located care-of address as the IP source address. Similarly, a mobile node that tunnels a multicast datagram to its home agent uses its home address as the IP source address of both the multicast datagram and the encapsulating datagram. This second option assumes that the home agent is a multicast router.