Production network connections for this deployment example are shown in Figure 8. Each leaf switch has one connection to each spine switch, and each VxRail node has one connection to each leaf. For the switches used in this deployment example, connections from leafs to spines are 100 GbE, connections from leafs to VxRail nodes are 25 GbE, and VLTi connections between leafs are 200 GbE.
Note: If Dell EMC PowerSwitch S4100 series leaf switches are used (not shown), connections to VxRail nodes are 10 GbE. The S4100 series switches have 100 GbE ports available for connections to spines.
Note: In this example, the two QSFP28-DD double density ports (2x 100 GbE interfaces per physical port), available on S5248F-ON switches, are used to create a 400 GbE VLTi. This requires QSFP28-DD DAC cables or optics. On switches without QSFP28-DD ports, QSFP28 (100 GbE) or QSFP+ (40 GbE) ports are typically used for VLTi connections. The VLTi synchronizes L2 and L3 control-plane information across the two nodes. The VLTi is used for data traffic only when there is a link failure that requires the VLTi to reach the destination. Dell Technologies recommends using at least two physical ports on each switch for the VLTi for redundancy and to provide additional bandwidth if there is a failure.