This feature allows you to add, edit, and delete an IPv6 address range. An IPv6 address range is a group of several IPv6 addresses and uses the following format:

• The range should be a shortened IPv6 address that ends with a slash (/), followed by a number which indicates the network portion of the IPv6 address range.
• The most common network portion will be /64. The network portion might be as low as /48, or as high as /128, which would be a single IPv6 address.
• For example: 2001:db8:1a34:56cf::/64

When you assign an IPv6 address to a user, you will choose a range that you added here.