Phil Roberts, ISOC
On June 8, 2011, many websites around the world made their main webpage reachable over IPv6 for 24 hours, and many of those that did this left their sites IPv6-accessible afterward.
Major worldwide websites enabled IPv6 on their main page. Google enabled not only its main website but also YouTube and Blogger. Facebook and Yahoo! both enabled their main webpages as well. These websites are the five most visited websites in the world according to Alexa rankings. Other major worldwide websites that enabled IPv6 include Yahoo! Japan, Bing, Microsoft, BBC, CNN, and AOL.
Important local websites in countries around the world also joined in. In South Korea both Naver and Daum (the first and fourth most visited sites in South Korea according to Alexa) joined the event. In the Czech Republic four of the top 25 local websites joined. There were also major sites from Brazil, Portugal, and Indonesia.
Enabling IPv6 in this way served numerous purposes:
More than 1000 organizations contacted the Internet Society. Many of these organizations had already permanently enabled IPv6. Of the 430 or so websites the Internet Society monitored on the day, roughly two-thirds have continued to provide IPv6 access after the day.In addition, major hosting companies enabled IPv6 for large numbers of domains, including Domain Factory, which, as a result of participating in World IPv6 Day, has made IPv6 "on by default" for all of its more than 800,000 domains. Another hosting company, Stratos, left IPv6 on after June 8 for its more than 4 million domains.
RIPE Labs did extensive measurements of IPv6 leading up to, on, and after the day, and it has published results indicating an increase in IPv6 traffic on the day—and an overall increase in IPv6 traffic also after the day.