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Production network connections for this deployment example are shown in Figure 8. Each S5200 series leaf switch has one connection to each spine switch, and each VxRail node has one connection to each leaf. Connections from leafs to spines are 100 GbE, and connections from leafs to VxRail nodes are 25 GbE.
Note: If S4100 series leaf switches are used (not shown), connections to VxRail nodes are 10 GbE. S4100 series switches have 100 GbE ports available for connections to spines.
Figure 8. Production network connection details
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.