Rockwell has a decent series of Reference Architecture Whitepapers. Reference Architectures for Manufacturing does touch on how to segment your network to deal with Multicast traffic.

This whitepaper also talks about structure of a network for Ethernet/IP.

If you are dealing with the Ethernet/IP protocol specifically, my understanding is that the specification for Ethernet/IP requires all devices using multicast to hard code their Time-to-Live (TTL) to 1, which means they will not multicast past routers.

Any good industrial managed Ethernet switch (with IGMP snooping) is sufficient to control multicasting/traffic on the network. I have used N-Tron managed switches in the past to successfully control traffic from a processor to field devices.