How does option "Additional IP addresses" work for IPv6 addresses in SolusVM 2 ?

Question 

How does option SolusVM 2 > Plans > a plan > Additional IP addresses work for IPv6 addresses in SolusVM 2? When VPS is created - it has only one IPv6 address even when the option is enabled.

Answer

Option Additional IP addresses adds only IPv4 addresses to a SolusVM 2 VPS.

When IPv6 block is added in SolusVM 2 a subnet of IPv6 addresses is set which will be assigned to a new VPS. By default only one IPv6 address is added from the subnet to a VPS, however, any number of additional IPv6 addresses from the assigned subnet can be added manually inside VPS.