If you want to delete an overlay but keep your transport nodes in place, follow these steps.

Procedure

  1. Log in to the vSphere Client.
  2. In your VM management tool, detach all VMs from any logical switches and connect the VMs to non NSX-T Data Center networks.
  3. For KVM hosts, SSH to the hosts and power off the VMs.

    shutdown -h now

  4. In the NSX Manager UI or API, delete all logical routers.
  5. In the NSX Manager UI or API, delete all logical switch ports and then all logical switches.
  6. In the NSX Manager UI or API, delete all NSX Edges and then all NSX Edge clusters.
  7. Configure a new NSX-T Data Center overlay, as needed.