At a recent online meeting Google network engineer Zhenya Linkova discussed the project to migrate Google's corporate network to IPv6-only.
One of the stages involved transitioning the guest network to IPv6 only. NAT64 was used for access to the legacy Internet, and DNS64 was employed on public Google DNS. Of course, DHCP6 was not used; only SLAAC.
As a result of testing, less than 5% of users switched to fallback dual stack WiFi. As of July 2020, most Google offices have an IPv6-only guest network.
Available report.
Source: habr.com
