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Comcast 6to4 Configuration Instructions for IPv6

6to4 Configuration Instructions

As part of Comcast's IPv6 trials, we are testing 6to4. On August 17, 2010, we activated the first or our 6to4 relays, which are now deployed in a total of five locations around the network. These 6to4 relays are available via the standard 6to4 Anycast IP address, according to RFC 3068, which is 192.88.99.1. Devices attempting to use 6to4 within our network should automatically discover and utilize these 6to4 relays, without end user intervention or configuration. More information can be found below, including what home gateway devices offer 6to4 support and how to activate that function.

 

6to4 FAQs:

What is the IP address of the 6to4 relay?
These 6to4 relays are available via the standard 6to4 Anycast IP address, according to RFC 3068, which is 192.88.99.1. You should not need to configure this in your home gateway device; if you have 6to4 turned on it should simply use the closest 6to4 relay in our network.

What devices support 6to4?
A current list can be found here on Wikipedia. As of October 2010, that includes the Apple Airport Express and Extreme, Linksys WRT610N, and several other devices.

How do I configure 6to4 on the Apple Airport Express, Extreme, or Time Capsule?

  • You can refer to your manual online here
  • Open the Airport Utility application
  • Select your device, then click Manual Setup
  • Click the Advanced icon (the gray gear)
  • Click the IPv6 tab
  • For IPv6 Mode, select Tunnel
  • Make sure Configure IPv6 is set to Automatically

How do I configure 6to4 on the D-Link DIR-825 or DIR-615?

  • You can refer to your manual online for the DIR-825 here and the DIR-615 here
  • Select the Advanced tab at the top
  • Select IPv6 at the bottom of the left panel
  • From My IPv6 Connection is: select 6to4
  • In LAN IPv6 Address: enter your desired network number
  • Make sure Enable Auto-configuration is checked
  • Auto-configuration Type should be Stateless

How do I configure 6to4 on the Linksys WRT610N?

  • You can refer to your manual online here
  • No configuration is required, as 6to4 is on by default (and also cannot be disabled from the web configuration interface)

Do you offer technical support for 6to4?
No we do not. 6to4 is part of our IPv6 trials. On or before the conclusion of these trials we will decide whether or not we will continue to maintain 6to4 Relays, and if we do so, whether and what type of technical support may be offered.