What's wrong with IPv4 multicast?
Thin layer above the MAC that translates a 224/4 address into a multicast request. Converting the former RESERVED range (225-232) into unicast requests
While multicast is a needed, essential feature of any modern network, it is rarely used for anything besides configuration and initial services discovery. Reserving 268 million addresses for it is a waste.
- there are no restrictions on converting a multicast address into a multicast