You can create an external network that is backed by an NSX-T Data Center segment.

In NSX-T Data Center, segments are virtual layer 2 domains. A segment was earlier called a logical switch.

Adding an NSX-T segment enables the creation of direct organization VDC networks backed by NSX-T Data Center.

An NSX-T Data Center segment can be backed either by a VLAN transport zone or by an overlay transport zone.


  • Verify that you are a system administrator.
  • Verify that you created the segment in NSX-T Manager. For more information segments, see NSX-T Data Center Administration Guide.


  1. Log in to the VMware Cloud Director Service Provider Admin Portal.
  2. From the top navigation bar, select Resources and click Cloud Resources.
  3. In the left pane, click External Networks and click New.
  4. On the Backing Type page, select NSX-T Segments and a registered NSX-T Manager instance to back the network, and click Next.
  5. Enter a name and, optionally, a description for the new external network.
  6. Select an NSX-T segment from the list to import and click Next.
  7. Configure at least one subnet and click Next.
    1. To add a subnet, click New.
    2. Enter a gateway CIDR.
    3. To enable, select the State checkbox.
    4. Configure a static IP pool by adding at least one IP range or IP address.
    5. Click Save.
    6. (Optional) To add another subnet, repeat steps Step a to Step e.
  8. Review the network settings and click Finish.