If you need some generic introduction to configuration IP Multicasting,
read first the Quickstart Configuration and Whitepapers in the Documentation
section.
If you do not find a configuration note below for a specific IP multicast
related feature, take a look into the New
IP Multicast Features section.
Always check the configuration notes against the appropriate CCO IOS Configuration
Guide and IP Multicast Command References to see if they do apply to your
IOS version. Again, see the Documentation
section for links to them.