The following requirements apply to NSX Manager cluster configuration:

  • In a production environment, the NSX Manager cluster must have three members to avoid an outage to the management and control planes.

    Each cluster member should be placed on a unique hypervisor host with three physical hypervisor hosts in total. This is required to avoid a single physical hypervisor host failure impacting the NSX control plane. It is recommended you apply anti-affinity rules to ensure that all three cluster members are running on different hosts.

    The normal production operating state is a three-node NSX Manager cluster. However, you can add additional, temporary NSX Manager nodes to allow for IP address changes.

    Important: As of NSX-T Data Center 2.4, the NSX Manager contains the NSX Central Control Plane process. This service is critical for the operation of NSX. If there is a complete loss of NSX Managers, or if the cluster is reduced from three NSX Managers to one NSX Manager, you will not be able to make topology changes to your environment, and vMotion of machines depending on NSX will fail.
  • For lab and proof-of-concept deployments where there are no production workloads, you can run a single NSX Manager to save resources. NSX Manager nodes can be deployed on either ESXi or KVM. However, mixed deployments of managers on both ESXi and KVM are not supported.

Important: The number of sites in an NSX-T Data Center deployment can affect requirements. See NSX Manager Cluster Requirements for Single, Dual, and Multiple Sites.