How to setup ipv6 gateway?

[bb-lcloud]

Hello I want to ask how to setup ipv6 gateway.
My problem is that the screen in wchich you register new gateway in web UI doesn't allow to input ipv6
Related docs(which screen I mean)

I am entering ipv6 adress as gateway IP along with mask, but it says incorrect address.

I also tried using ipv6 from ibm site

[kchudy]

Hi @bb-lcloud , entering IPv6 addresses was introduced in v1.4.