AllenBradley- Multicast and ethernet Switch

2	does anyone know how the AllenBradly PLC utilizes the Multicast feature? I am connecting it to a Ethernet switch. need to know what I need to support on the switch. allen-bradley asked Dec 30 '09 at 04:30 Mahesh Patel 21●1 edited Dec 30 '09 at 13:50 Scott Whitlock ♦♦ 635●1●13

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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.

link

answered Dec 30 '09 at 12:08

Scott Whitlock ♦♦
635●1●13

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.

link

answered Jan 04 '10 at 20:03

Darryl King
151●4

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