The preferred topology for PowerMax is the dedicated dual-SAN with air-gapped switches or fabrics. Cross connects between SAN switches and PowerMax nodes are not used. Fan-in/fan-out is not required for PowerMax. PowerMax supports up to 32 links per node. Other requirements for NVMe/TCP on PowerMax are described in IP network requirements.
Additional links can be added on the same subnets, or on different subnets.
Further PowerMax documentation can be found on the Dell Support site.