Edge node cluster architecture standards In VMware NSX-T Data Center, an edge node cluster is a group of edge nodes. The edge nodes can be deployed in a virtual (VM based) or physical (bare-metal) form factor. The initial VxBlock System 1000 implementation of VMware NSX-T Data Center supports only virtual edge clusters. This implementation provides some benefits for flexibility of deployment and serviceability over bare-metal edge nodes. The VxBlock System VMware NSX-T Data Center design adopts the VMware recommended edge cluster design for service providers. This design includes two edge clusters: Edge-Cluster-NS-Peering is a dedicated edge cluster to host a Tier 0 router for BGP peering and north-south traffic flows. The traffic flows need to communicate from the VMware NSX-T Data Center environment to the physical environment and the outside world. The edge node VMs that make up this cluster are deployed as medium-sized appliances. Edge-Cluster-Production01 is a production edge cluster that tenants or business units can use. The edge node VMs that make up this cluster are deployed as large-sized appliances. A T1 gateway should be associated with this cluster only if the T1 gateway is hosting centralized services such as NAT or Edge Firewall. This design provides role-based security. In a large IT shop or multi-tenant environment: One group can secure the NS-Peering edge cluster to VMware NSX-T Data Center administrators and support personnel. A different group can manage the Production01 edge cluster. VMware NSX-T Data Center enables the definition of role-based access to these clusters independently, using the API. This design also mitigates limitations in the BGP peering capabilities of the T0 gateway. The T0 gateway supports eight-way ECMP peering. The VxBlock System VMware NSX-T Data Center design connects a single T0 gateway in one of two ways in the edge-cluster-NS-peering cluster: Through two edge node VMs (4-way ECMP) Through four edge node VMs (8-way ECMP) Depending on the need, deploy additional edge node VMs, add connectivity for the T0 gateway, or add a T0 gateway. Two ToR switches north of the edge cluster can support only four edge VMs peering north-bound to the ToR switches in a cluster. The Production01 edge cluster does not need to participate in ECMP peering with the ToR switches. If necessary, the cluster can contain more than four nodes.