https://blogs.vmware.com/cloud/2019/07/02/dhcp-dhcp-relay-vmware-cloud-aws/

To create a new network segment in the software-defined data center that utilizes the corporate DHCP server to provide IP addresses, the proper sequence is to create a DHCP relay profile, create a new segment attached to the Tier-1 gateway, and configure the segment DHCP config to utilize the new DHCP relay profile1.This is because the DHCP relay profile contains the IP address of the external DHCP server and the DHCP relay agent that forwards the DHCP requests and responses between the segment and the DHCP server1.The segment must be attached to the Tier-1 gateway, which is the edge device that provides routing and firewall services for the segment2.The segment DHCP config allows the administrator to specify the DHCP type, the DHCP relay profile, and the DHCP options for the segment3.Reference:1: Configure Segment DHCP Properties - VMware Docs,2: Create or Modify a Network Segment - VMware Docs,3: Segment DHCP Config - VMware Docs