Participants in the June 8 IPv6 day reported it generally uneventful with all connectivity occurring as normal.
The Internet Society, the sponsor for the event, posted this on their website.
Successful World IPv6 Day Demonstrates Global Readiness for IPv6
Top websites serving billions of users demonstrate progress towards largest transition in Internet’s history
Top websites and Internet service providers around the world, including Facebook, Google, Yahoo, Akamai, and Limelight Networks, joined together with more than 1000 other participating websites in World IPv6 Day for a successful global-scale trial of the new Internet Protocol, IPv6. By providing a coordinated 24-hour “test flight”, the event helped demonstrate that major websites around the world are well-positioned for the move to a global IPv6-enabled Internet, enabling its continued exponential growth.
During World IPv6 Day organized by the Internet Society, nearly 400 participating organizations enabled IPv6 on their main services for 24 hours on 8 June. With IPv4 addresses running out this year, the industry must act quickly to accelerate full IPv6 adoption or risk increased costs and limited functionality online for Internet users everywhere. World IPv6 Day participants came together to help motivate organizations across the industry–Internet service providers, hardware manufacturers, operating system vendors and other web companies–to prepare their services for the transition.
A key goal of World IPv6 Day was to expose potential issues with real-world IPv6 use under controlled conditions. Given the diversity of technology that powers the Internet, the global nature of the trial was crucial to identify unforeseen problems. The vast majority of users were able to access services as usual, but in rare cases, users experienced impaired access to participating websites during the trial.