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Production network connections for this deployment example are shown in Figure 11. 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 100GbE, and connections from leafs to VxRail nodes are 25GbE.
Note: If S4100 series leaf switches are used (not shown), connections to VxRail nodes are 10GbE. S4100 series switches have 100GbE ports available for connections to spines.
Figure 11. Production network connection details
Note: In this example, the two QSFP28-DD double density ports (2x100GbE interfaces per physical port), available on S5248F-ON switches, are used to create a 400GbE VLTi. This requires QSFP28-DD DAC cables or optics. On switches without QSFP28-DD ports, QSFP28 (100GbE) or QSFP+ (40GbE) 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 recommends using at least two physical ports on each switch for the VLTi for redundancy and to provide additional bandwidth in case of a failure.