====== IPv6 on iPhone ======

Starting from iOS 4, iPhones provide support for IPv6 over the WiFi interface. Only stateless autoconfiguration is possible: the iPhone listens to Router Advertisement packets and automatically gets IPv6 configuration. The [[https://itunes.apple.com/us/app/ipv6-toolkit/id440597511?mt=8 | IPv6 Toolkit]], downloadable from the App Store, shows extended information on the IPv6 configuration of the iPhone:

[{{ :iphone-interface.png?direct&250 | Figure 1. IPv6 toolkit interface}}]
 
Note that two IPv6 addresses are auto-configured using a /64 announced prefix:
  - One address with a MAC-based interface identifier on the last 64 bits,
  - A second address with a random interface identifier, as specified by [[http://www.rfc-editor.org/rfc/rfc4941.txt | RFC 4941]] on Privacy extensions for stateless address autoconfiguration in IPv6.
On the integrated Safari navigator, the ipv6-test.com website shows that the iPhone can be considered as a dual stack equipment and that the RFC 4941 autoconfigured address is used over the internet.
[{{ :iphone-addr.png?direct&250 | Figure 2. Testing IPv6 on an iPhone}}]