Ways to persist DUID to use with DHCPv6?

[p-v-n]

I noticed that DUID that is sent to DHCPv6 is not persisted across reboots. Apparently, it's a DUID-LLT type.
Are there ways to make it persistent? For example, is there a way to force DUID-LL type?

Thanks!

 

[p-v-n]

Anyone?