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Dell VxRail Network Planning Guide
Introduction Planning Your Data Center Network for VxRail
Introduction to planning
VxRail hardware and the physical network infrastructure
VxRail clusters and nodes
Network switch
Data center network
VxRail networking port options
VxRail Ethernet adapter options
VxRail Fibre Channel 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 Data Center for VxRail Implementation Planning the VxRail Cluster Implementation Planning vSAN Witness Networking Planning VxRail Satellite Nodes Networking Configure the Network for VxRail Preparing to Build the VxRail Cluster VxRail Network Considerations After Implementation Appendixes

VxRail RoCE adapter options

VxRail RoCE adapter options

  • RoCE adapter support Remote Direct Memory Access (RDMA) connectivity over Converged Networks. RDMA is a technology to enable sending data over a network without involving the CPU in the transfer, thereby providing appreciable IOPS performance in comparison to other network-based storage connectivity options. Enabling RDMA over a Converged Ethernet network infrastructure provides faster data transfer for network-intensive applications through lower I-O latencies on this network.

    Port speed

    Vendor

    25 GbE

    Mellanox

    The following guidelines should be understood for RoCE-supported adapters:

    • The VxRail cluster must be configured with a minimum version of 7.0.200.
    • All the nodes in the cluster connected to the common vSAN datastore must be configured with RoCE-supported adapter cards of the same vendor and the same model. This is strongly encouraged as a best practice to remove any possibility of slight variances in adapters from different vendors or different models disrupting I/O on the vSAN datastore.
    • The Ethernet ports on the RoCE-supported adapters are reserved for vSAN traffic only.
    • The physical network supporting vSAN is configured as a “lossless” network.