I run a small ISP for a rural community in England. There are around 350 residential properties and 15 small businesses. Three of these businesses run systems that require two consecutive IPv4 addresses - it is some sort of EDI system for taking orders, but I don't know the details.
There is currently no IPv6 provision at all. Until very recently our upstream provider has only made IPv4 space available.
I am considering options to deploy IPv6. DS-Lite is one of the options, although I am at the research stage.
https://benunetworks.com/new-products/dual-stack-lite/ would suggest that ISPs that deploy DS-Lite will be unable to route IPv4 blocks to their clients as CGNAT is performed in the provider network.
Is this a true reflection of the technical reality? I would like to be as IPv6 native as possible - the attraction to DS-Lite - but I still need to let business customers do their own NAT for IPv4.
I am hoping someone has deployed DS-Lite and will be able to enlighten me.