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An ISP probably already has IPv4 addresses, but needs more addresses for basic connectivity. They can become IPv6-only and then use their IPv4 block/s for CGNAT
by throw0101a 5y ago
An ISP probably already has IPv4 addresses, but needs more addresses for basic connectivity. They can become IPv6-only and then use their IPv4 block/s for CGNAT. The money would go to either buying more addresses or more CGNAT.
This is how a lot of mobile/cell telcos already work. A T-Mobile presentation from 2018 (PDF):
* https://pc.nanog.org/static/published/meetings/NANOG73/1645/20180625_Lagerholm_T-Mobile_S_Journey_To_v1.pdf https://pc.nanog.org/static/published/meetings/NANOG73/1645/...
- ipv6_or_nat 5y agoRunning an IPv6 core and offering IPv4-as-a-service doesn’t really make you IPv6-only.
- throw0101a 5y agoI'm not sure what you're referring to. Here's a dude from T-Mobile explaining how they have (in 2017) over ten million end-customer devices without any IPv4 addresses assigned: * https://www.youtube.com/watch?v=nNMNglk_CvE https://www.youtube.com/watch?v=nNMNglk_CvE For reaching services that are IPv6 only they use(d) DNS64 (with and without 464XLAT).
- ipv6_or_nat 5y agoIPv6-only as a term has been heavily abused. A truly IPv6-only network has no access to IPv4 resources. If it does, it isn’t really IPv6-only and relies upon IPv4 addresses and NAT to work.