Switch Types and Network Connectivityįollow the best practices for physical switches, switch connectivity, VLANs and subnets, and access port settings. In this design, network traffic flows in and out of a primary site or region. Because of the complexity of local-ingress, local-egress is not generally in use. As such, BGP must be present in your environment to facilitate the failover of networks from site to site. This design uses BGP as the dynamic routing protocol. In an environment with multiple availability zones or regions, dynamic routing is needed to provide networks with the ability to fail ingress and egress traffic over from availability zone to availability zone, or from a protected region to a recovery region. The method for stretching these Layer 2 networks and providing a highly available Layer 3 gateway is vendor-specific. You also must provide a Layer 3 gateway that is highly available between availability zones. In an environment with multiple availability zones, Layer 2 networks must be stretched between the availability zones by the physical infrastructure. VMware Validated Design uses the leaf-spine networking topology, because in a single data center deployment, it provides predictable performance, scalable nature, and applicability across multiple vendors. Several typical data center network deployment topologies exist: SDN integrates with your physical network to support east-west transit in the data center and north-south transit to and from the SDDC networks. Design of the physical data center network includes defining the network topology for connecting the physical switches and the ESXi hosts, determining switch port settings for VLANs and link aggregation, and designing routing.Ī software-defined network (SDN) both integrates with and uses components of the physical data center.
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