Before you install, make sure that your subnetwork meets all requirements.
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Place machines containing RAP components on the same subnetwork.
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For all Ethernet interfaces that connect publishers to subscribers, set maximum transmission unit (MTU) sizes set to the same value. This common value cannot exceed any MTU size limitations on the switches and routers connecting the RAP machines.
If you use a router instead of a switch to connect to the RAP machines, you must also enable the UDP Multicast option.