IPv6 Summit 2014: Wells Fargo adopting IPv6

> What is the sales pitch you would bring to the CEO of a Fortune 500? When you buy or merge companies, and they both have RFC 1918 addresses, you'll probably have a conflict between the two entities. You'll probably have to implement NAT with-in your own network and hope the two sides don't have to talk to each other that much. (Or you completely re-IP the acquisition.) With IPv6, either the companies will be using their own PI IPv6 space and/or they will be using unique ULA prefixes, so the chance of conflicts will be very small. This at least was one of the business cases for Wells Fargo, "the fourth largest bank in the United States by total assets and is one of the largest as ranked by bank deposits and market capitalization": * [VIDEO]

> There’s (IMO) a much better reason: so your endpoints can have globally unique addresses. Complications with address space collisions (esp. M&A) was one of the reasons give in this Wells Fargo presentation from 2014: * [VIDEO]

> I have yet to meet an infrastructure engineer or even hear of one who switched to IPv6 on purpose because they thought it was better. T-Mobile US: * [LINK] Wells Fargo: * [VIDEO] Microsoft * [LINK] * [LINK] Google: * [LINK] LinkedIn: * [LINK] Facebook is famously IPv6-only internally (and as of 2016, 60% of user traffic was over IPv6): * [LINK] * [LINK] * [LINK]

Tell that to T-Mobile US: * [LINK] Wells Fargo: * [VIDEO] Microsoft: * [LINK] * [LINK] Google: * [LINK] LinkedIn (pre-Microsoft): * [LINK]

> IPv6 can work side by side with IPv4 on the servers, but it cannot replace IPv4. Facebook is famously IPv6-only internally (and as of 2016, 60% of user traffic was IPv6-only): * [LINK] * [LINK] * [LINK] Microsoft and Google are IPv6-only single-stack (or moving in that direction) on their internal corporate networks: * [LINK] * [LINK] * [LINK] Also Wells Fargo: * [VIDEO] The main 'advantage' IPv4 has is inertia.

> Not sure why you'd need more than 10/8 Large organizations have moved to IPv6 because they, and everyone else, are using 10/8, and so when mergers and acquisitions happen trying to connect the networks together becomes a nightmare. See this talk from Wells Fargo as an example: * [VIDEO]