How to set up a static ipv6 address in ZTE F670L modem?

Question

Computer networks

A static IP address is required to access remote services. Beltelecom (Belarus) received an ipv6 address from the ISP in the following format XXXX:XXXX:XXXX:XXXX:0000:0000:0000:0000. In services for determining ip addresses, it is determined, i.e. instead of 0000:0000:0000:0000, other values ​​are substituted and it is visible (as I understand it, it was received automatically via DHCPv6). But when I reboot the modem, ipv6 changes. How can we configure it so that ipv6 is always the same. Here is a detailed model of the F670L V9.0.11P1N24 modem.

Answer 1

1. Read what ipv6 is. Understand what subnet you were given. Most likely /64, and all these addresses are yours.
2. Ask such questions to the technical support of the provider.

Answer 2

Enter by hand any address from the subnet given to you. You can even add a few.
Addresses may change due to Privacy Extensions for Stateless Address Autoconfig...