You can configure it before or after the deployment of VCOPS. I am doing it after the installation.
Click on your Datacentre name in vCenter server and then go to IP pool Tab.
If you don’t create an IP pool, when you start the VMs you will get this error message "Cannot initialize properly ‘vami.netmask.VM_1’.Network ‘your network name’ has no associated network protocol profile"
Add a new IP pool
Type the name you can recognize easily later and the subnet of VCOPS server and gateway address of the subnet.
If your network has a DCHP available, select the IPv4 DHCP present
Type the DNS domain name and DNS IP address
Choose the network in the associate tab
That’s it. The IP pool has been created and you can start your server.