On 8/9/19 1:32 AM, Vincent Bernat wrote:
❦ 8 août 2019 16:18 -04, Lee Howard <lee.howard@retevia.net>:
NAT64. IPv6-only to users. DNS resolver given in provisioning information is a DNS64 server. When it does a lookup but there's no AAAA, it invents one based on the A record (e.g., 2001:db8:64::<IPv4 address>). The IPv6 prefix in the invented AAAA is actually a NAT64 translator. Pro: no CPE support required, well understood. Con: No support for IPv4-only stuff in the prem, breaks DNSSEC. Is there a known deployment for a medium/large ISP?
Not a fixed/wireline ISP. The "con" that consumers' game consoles, smart TVs, and IoT things won't work is a pretty big "con." I was working with a small ISP that was running out of IPv4 addresses, and they kept saying "NAT64." I warned them that while NAT64 would solve their runout problem, it would drive a lot of unhappy customer calls. It would be interesting if someone offered a NAT64 service (maybe for a reduced price). Buyers could tell consumer electronics companies, "I can't use your device without IPv6." But qualifying the customer who would do that would be more expensive, I think, than just buying IPv4 addresses. Also but, would that be a Net Neutrality problem, charging less for a service that has arguably worse access to Amazon, Reddit, Twitter, etc.? Lee
Thanks.