NSX allows for one-to-one static NAT IP address allocation and IP address pooling. When the DHCP service is set up, it listens to any DHCP discovery requests on the internal interfaces and responds:

1. Go to Home | Networking & Security | NSX Edges, and double click an NSX Edge, and navigate to Manage | DHCP:

2. Click the + icon to add a new pool:

3. Enabling Auto Configure DNS allows you to configure the DNS for every DHCP binding automatically.
4. Enabling Lease Never Expires binds the IP to the MAC address forever.
5. Enter the Start IP and the End IP. Fill in the rest of the form with applicable values and click OK when done.
6. Now that a pool has been added, let's go ahead and enable the DHCP service.
7. Click on Enable and click Publish Changes. You can also enable logging by selecting Enable logging and setting the appropriate log level.