Various network topologies are possible with VxRail clusters. Complex production environments have multi-tier network topologies with clusters in multiple racks, and spanning across data centers. Simpler workloads can be satisfied with the nodes and adjacent switches confined to a single rack, with routing services configured further upstream. A site diagram showing the proposed network components and connectivity is highly recommended before cabling and powering on VxRail nodes, and before performing an initial build of the VxRail cluster.
Decide what network architecture you want to support the VxRail cluster, and what protocols will be used to connect to data center services and end users. For VxRail clusters managing production workloads, VLANs will be configured to support the VxRail networks. Determine which network tier the VxRail networking VLANs will terminate, and which tier to configure routing services.
To determine the base number of ports required on each switch to support VxRail cluster operations, multiply the number of Ethernet ports on each VxRail node you select to support VxRail networking by the number of nodes to be configured into the cluster. For a dual switch configuration, ports must be reserved on each switch to form an inter-switch link for network traffic passage. You will also need to reserve additional ports to pass VxRail network traffic upstream, and one port on a switch to enable a laptop to connect to VxRail to perform initial build.
To use out-of-band management, connect the integrated Dell Remote Access Controller (iDRAC) port to a separate switch to provide physical network separation. Default values, capabilities, and recommendations for out-of-band management are provided with server hardware information. You must reserve an IP address for each iDRAC in your VxRail cluster (one per node).