On 7/Jul/20 19:23, JORDI PALET MARTINEZ via NANOG wrote:

There was, long time ago, something developed by ISC, but I think never completed and not updated …

464XLAT is always a solution and becomes much cheaper, than CGN from vendors, even if you need to replace the CPEs. I’m doing that now with 25.000.000 subscribers … (slowed down by the Covid-19).

I have to agree... as "transition" tech. goes, 464XLAT is the least intrusive solution, because as more of your customers acquire IPv6, the demands you put on your 464XLAT systems reduce, naturally. It also means you don't have to carry out yet-another transition to get the full IPv6 experience.

Mark.