Рассказ в трех частях как Linkedin ipv6 внедрял.
https://engineering.linkedin.com/blog/2016/07/ipv6-at-linkedin-part-i--chippin-away-at-ipv4
https://engineering.linkedin.com/blog/2016/08/ipv6-inside-linkedin-part-ii--back-to-the-future
https://engineering.linkedin.com/blog/2016/11/ipv6-inside-linkedin-part-iii--the-elephant-in-the-room
https://engineering.linkedin.com/blog/2016/07/ipv6-at-linkedin-part-i--chippin-away-at-ipv4
https://engineering.linkedin.com/blog/2016/08/ipv6-inside-linkedin-part-ii--back-to-the-future
https://engineering.linkedin.com/blog/2016/11/ipv6-inside-linkedin-part-iii--the-elephant-in-the-room