IPv6 Multicast Address With Embedded IPv4 Multicast Address
This document reserves one bit (M-bit) of the unicast prefix-based multicast IPv6 address for ASM and an IPv6 multicast prefix for SSM mode to be used in the context of IPv4-IPv6 interconnection. The document specifies an algorithmic translation of an IPv6 multicast address to a corresponding IPv4 multicast address, and vice versa. This algorithmic translation can be used in both IPv4-IPv6 translation or encapsulation schemes.