Individual IPv6 / Subnets
Hypervisor allows you to add a IPv6 subnet and generate individual IP(s) or Smaller subnets in order to get them assigned to instances.
If you refer to the screenshot below, you can understand that you need to provide the gateway and the parent subnet mask in this form to add the subnet to your list.

After doing the above you can go back to the Networks overview and click on the Add IPv6 Button.
Generating Individual IPv6 Addresses
So based on your IPv6 subnet you could fill the following 6 fields with their own values and then generate Individual IPs the last 2 fields are auto generated randomly.
Lets assume your IPv6 subnet is 2405:7140::14::/64 so in the following form you'd be filling
2405 : 7140 : 0000 : 0014 : 0000 : 0000 : auto : auto

Generating IPv6 Subnets
Based on the parent mask the fields are greyed out so that you could fill in the sequence your self and then you can give in the count or number of subnets you want to generate.
