
184 Part Two • IPv6 Protocols
Although the fundamentals are quite similar to multicast in IPv4, IPv6
protocols depend to a great degree on the use of multicast for functions
such as neighbor discovery (see Chapter 13), node autoconfiguration (see
Chapter 16), mobile IPv6 (see Chapter 17), and more.
As part of the renovation and simplification of IPv4-generation protocols,
and to improve the efficiency with which the functions just cited are per-
formed, IPv6 multicast has also been streamlined. The Internet Group
Management Protocol (IGMP) used in parallel with ICMP in IPv4 has been
dropped for IPv6. Instead, IPv6 multicast recipients are detected with ...