In HP OneView, you can create the hardware server profiles in advance and get all the MAC addresses in one bunch, using i.e. PowerCLI with the HP modules. Then use it for the scripted IP address reservation with your DHCP solution. You can even add further options like Gateway, etc.
As soon the hardware gets the profile applied,
1. it will bootup with the proper IP config
2. It gets the ESXi image, defined in AutoDeploy
3. Gets added to the vCenter and having further settings applied, using Host Profiles (When you have Enterprise Plus)