Log in to the vSphere Web Client.

Click Networking & Security and then click NSX Managers.

Click an NSX Manager in the Name column and then click the Manage tab.

Click the Grouping Objects tab and then click IP Pool.

Click the Add New IP Pool icon.

Type a name for the IP pool and type the default gateway.

Type the primary and secondary DNS and the DNS suffix and the prefix length.

Type the IP address ranges to be included in the pool and click OK.