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Tuesday, February 2nd, 2016 12:00 PM

Using the Apple Airport Extreme with Comcast Native IPv6

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​T​​he Apple Airport Extreme works well with Comcast Native IPv6. Specific application notes are included below. ​

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​Overview -​

​Any Apple Airport Extreme released in the last three years with firmware 7.6.1 or newer provides both IPv6 native connectivity and IPv4 NAT connectivity. Comcast Business Internet assigns a ​​dynamic​​ /128 address for the WAN connection and delegates a /56 prefix  for LAN use. Since the Airport has one LAN, common to both Ethernet and WiFi, it uses a /64 prefix obtained from the /56 delegation. IPv6 DNS query settings are also provided to the LAN connected systems. ​

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​Configuratiion -​

​The IPv6 specific configuration steps below assume a standard setup for IPv4 and Comcast connections.​

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​Using Airport Utility 6.1 or newer:​

  • ​Select the ​​Airport Extreme​​ and click ​​Edit​
  • ​Select the ​​Internet​​ tab and click ​​Internet Options...​
  • ​Configure IPv6: ​​Automatically​
  • ​IPv6 Mode: ​​Native​
  • ​Check ​​Enable IPv6 Connection Sharing​
  • ​Update​​ and ​​Exit​

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​IPv6 Application Notes - ​

  • ​Have patience while waiting for Comcast supplied IPv6 parameters to appear.  It takes a while. ​
  • ​In OS X, configure IPv6: ​​Automatically​​ in the appropriate interface settings.  ​
  • ​In Windows 7 and later, IPV6 is configured by default.​
  • ​Comcast's customer IPv6 addressing is all ​​dynamic​​ and, at this time, ​​no static​​ IPv6 addressing is offered.​
  • ​For your end system DNS entries, use a dual-stack dynamic DNS updater on each system.​
  • ​When configuring a dynamic DNS updater, be certain to select the Prefix:EUI-64 address and not a privacy address.​

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