Multicast over TCP/IP HOWTO
Juan-Mariano de Goyeneche v1.0, 20 March 1998
This HOWTO tries to cover most aspects related to multicast over TCP/IP networks. So, a lot of information within it is not Linux-specific (just in case you don't use GNU/Linux... yet). Multicast is currently an active area of research and, at the time of writing, many of the "standards" are merely drafts. Keep it in mind while reading the lines that follow.