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For this deployment, the workload or VxRail traffic moves north-south and east-west. Several connections are configured between the racks, the external core network, and the two leaf pair switches. The following figure shows the overall data flow for this environment.
The north-south data flow is routed through Layer 3 (L3). The leaf switches are configured as the default Anycast gateway for all traffic coming from the VxRail cluster.
The VxRail cluster build requires access to one DNS server that is reachable on the network, with host records added for this build and deployment. This access can be a Layer 2 (L2) or L3 uplink from one of the leaf pair switches to the external network. This deployment uses an L3 uplink for DNS and NTP connectivity.
All east-west data flows such as vSAN, vMotion, and user data traffic is L2-encapsulated in L3. Each of these networks is assigned to a specific VNI. Each VNI is associated to a specific VTEP to create a point-to-point connection.
vSAN, vMotion, VxRail external management, and VxRail Internal management networks are considered infrastructure VLANs. These VLANs need to be switched for the VxRail nodes to discover each other during the build-out of the cluster.