VCF on VxRail Multirack Deployment using BGP EVPN: Creating a management domain with NSX-V (part 1 of 2)
At the physical layer of a Software Defined Data Center (SDDC), the switching fabric can be provided by either Layer 2 or Layer 3 transport services. A leaf-spine architecture using Layer 3 IP supports a scalable data network. In a Layer 3 network fabric, the physical network configuration terminates Layer 2 networks at the leaf switch pair at the top of each rack. However, VxRail node discovery and NSX Controller instances and other virtual machines rely on VLAN-backed Layer 2 networks. Discovery or virtual machine migration cannot be completed because the IP subnet is available only in the rack where the virtual machine resides. One approach to solve this challenge is to implement Border Gateway Protocol (BGP) Ethernet VPN (EVPN) to create control plane backed tunnels between the separate IP subnets creating Layer 2 networks that span multiple racks or locations.
Summary:
At the physical layer of a Software Defined Data Center (SDDC), the switching fabric can be provided by either Layer 2 or Layer 3 transport services. A leaf-spine architecture using
Layer 3 IP supports a scalable data network. In a Layer 3 network fabric, the physical network configuration terminates Layer 2 networks at the leaf switch pair at the top of each rack. However, VxRail node discovery and NSX Controller instances and other virtual machines rely on VLAN-backed Layer 2 networks. Discovery or virtual machine migration cannot be completed because the IP subnet is available only in the rack where the virtual machine resides. One approach to solve this challenge is to implement Border Gateway Protocol (BGP) Ethernet VPN (EVPN) to create control plane backed tunnels between the separate IP subnets creating Layer 2 networks that span multiple racks or locations.
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Published June 2019
This document provides step-by-step deployment instructions for Dell EMC OS10 L2 VXLAN tunnel using BGP EVPN. This guide provides the foundation for multirack VxRail host discovery and deployment. Also, the VMware Cloud Foundation (VCF) is deployed and provides a VMware NSX environment to enable a Software Defined Data Center (SDDC).