Deriving Ethernet Multicast Addresses from Multicast IP Addresses

For TCP/IP networks, the 23 low-order bits of the IP multicast address are placed in the low-order 23 bits of the Ethernet or IEEE 802 network multicast address 01:00:5E:00:00:00.

For example, the Ethernet multicast address for a multicast IP address of 224.0.0.9 would be 01005E000009. This address is specified in your initialization file. The address is derived as follows:

01005E is the IEEE part.

000009 is the 23 bits from the multicast IP address part.

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