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Dell VxRail Network Planning Guide
Introduction Plan the VxRail network
Plan the VxRail network
VxRail clusters and nodes
Network switch
VxRail relationship with the Ethernet switch VxRail node discovery and the Ethernet switch Basic switch requirements Switch performance considerations Storage network considerations Network redundancy and performance considerations
Data center network
Routing services
VxRail networking port options
VxRail Ethernet adapter options
VxRail FC adapter options
VxRail RoCE adapter options
VxRail DPU options
VxRail node connectivity options
VxRail networking rules and restrictions
Topology and connections
VxRail Cluster Types VxRail feature-driven decision points VxRail hardware and switch selection decision points Prepare the data center to implement VxRail Plan the VxRail cluster implementation Planning vSAN Witness Networking Planning VxRail Satellite Nodes Networking Configure the Network for VxRail Prepare to build the VxRail cluster VxRail network considerations after implementation Appendix A: VxRail Network Configuration Table Appendix B: VxRail Passwords Appendix C: VxRail cluster setup checklist Appendix D: VxRail Open Ports Requirements Appendix E: VMware VDS port group default settings Appendix F: Physical Network Switch Examples

VxRail RoCE adapter options

VxRail RoCE adapter options

  • The RoCE adapter supports RDMA connectivity over converged networks. RDMA is a technology to send data over a network without involving the CPU in the transfer.

    Enabling RDMA over a Converged Ethernet network infrastructure provides faster data transfer for network-intensive applications through lower I-O latencies on this network. IOPS performance is improved in comparison to other network-based storage connectivity options. The port speed for the Mellanox adapter is 25 GbE.

    The following guidelines apply for RoCE-supported adapters:
    • Verify that the VxRail cluster is configured with a minimum version of VxRail 7.0.200.
    • Configure all nodes in the cluster that are connected to the common VMware vSAN data store with RoCE-supported adapter cards from the same vendor with the same model. Variations in adapters from different vendors or different models can disrupt I/O on the VMware vSAN data store.
    • The Ethernet ports on the RoCE-supported adapters are reserved for VMware vSAN traffic only.
    • The physical network supporting VMware vSAN is configured as a lossless network. To determine which Ethernet adapters support RDMA, see the appropriate VxRail Support Matrix on the Dell Support site.