IPv6 carried half of global traffic for a single day in March, according to Google. The search and ads giant tracks the percentage of its users who access its services over IPv6 on a page that The Register has often seen used as a de facto indicator of all IPv6 uptake when we attend networking and internet governance events. According to the Big G’s stats, on March 28th, 50.1 percent of the traffic the company detected used IPv6, up from 46.33 percent a year earlier. Google’s data records plenty of days over the last year when IPv6 carried over 49.5 percent of traffic, and a slow climb towards greater prevalence of traffic using the protocol. Google has a decent view of the internet because its main domain and YouTube are the world’s two most-trafficked websites. However, other sources don’t currently report IPv6 at 50 percent of visible traffic. Cloudflare’s Radar service, rates IPv6 as the source of 40.1 percent of HTTP requests. APNIC labs found 43.13 percent of networks it can see are IPv6-capable.…