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Using the Apple Airport Extreme with Comcast Native IPv6
The Apple Airport Extreme works well with Comcast Native IPv6. Specific application notes are included below.
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.
Configuratiion -
The IPv6 specific configuration steps below assume a standard setup for IPv4 and Comcast connections.
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
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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