Yahoo is embracing IPv6 because it believes that an increasing number of those users will be accessing the Internet on IPv6-based devices, such as smartphones that connect to Verizon's LTE network.
"What are really driving us to IPv6 are two concerns," Bechtel says. "We couldn't scale with the available IPv4 space, and equally important was having IPv6 customers be able to connect to us. We realized that customers would not be able to get to us in the 2012 time frame."
Having focused on IPv6 for several years, Yahoo executives say they are surprised by the number of Internet companies seemingly in denial that IPv4 depletion is a serious issue.
"There is still some sentiment that people think this isn't real, that IPv4 may exhaust but we may figure out ways around it," Bechtel says. "In the end, people are going to spend as much time on those workarounds as they would going to IPv6."
Read more about LAN and WAN in Network World's LAN & WAN section.
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