Spaniard here. The only major ISP that has tried to enable IPv6 is Orange. They did so by putting people in a DS-Lite connection. This is, CG-NAT for IPv4 and

Spaniard here. The only major ISP that has tried to enable IPv6 is Orange. They did so by putting people in a DS-Lite connection. This is, CG-NAT for IPv4 and real IPv6 connectivity. Result: now everybody thinks "IPv6 sucks because it means I won't have an external IPv4 address". So they stopped the IPv6 programme. The other two major ISPs also are ready. They just have to flip the switch. That said... I bet most of the CPEs that are currently deployed have no IPv6 capability. The only ones that work with IPv6 are usually the fibre CPEs, which are more modern, by definition. IPv6 is simply a failure, especially if you, as an ISP, can afford to buy all the IPv4 addresses you need. And that's what happens in Spain for the three major ISPs: they have all the IP addresses they need, so there is no need at all for them to switch to IPv6. In fact, they are using this as a weapon against the new ISPs: one of the three major ISPs mocked a smaller one for having their clients behind a CG-NAT, which is something they had to do that because they simply have no IPv4 addresses. Our government forces the biggest ISP to share its last mile infrastructure with every ISP that wants to use it, so my question is, why doesn't the government force the big ISPs to share their IPv4 address pools?