IPv6 over xDSL

Routers that we have working with IPv6

  • Cisco 1841
  • Cisco 1721
  • Cisco 28xx with wic-1-adsl
  • Cisco 878
  • Speetouch 546v6 (with extra configuration detailed here)

Routers that we know do not work with the manufacturers firmware

  • Netgear any model
  • Cisco 828

Routers that can be made to work with 3rd party firmware

  • Linksys WRT54G-series

The official list of hardware that is certified IPv6 ready is available from


If you know more routers that we can add to this let us know

Configuration of Speedtouch 546v6The following is a brief tutorial sent to us by a customer – Entanet is not responsible for any hardware/software issues regarding the configuration of third party hardware.

Neither the Thomson SpeedTouch 546v6 nor the 585v6 are IPV6 compatible when using a PPPoA configuration.
Therefore, to use IPV6 it is necessary to change your SpeedTouch to a bridged PPPoE configuration.Changing your SpeedTouch to a bridged PPPoE configuration will result in all access from your network to the internet, and from the internet to your network bypassing many of the features of your SpeedTouch.These features include, the firewall, NATing, IDS, parental control, dynamic dns. This applies to both IPV4 and IPV6. It is therefore essential that a router/firewall is placed between the SpeedTouch and your network. This router/firewall must also be configured to establish a PPPoE session.

Additionally, as the SpeedTouch will not have external IP address, you will not be able to set the time
from an external time source or configure “Remote Assistance”.

If you wish to proceed, the first thing to do is backup your SpeedTouch’s configuration, and then reset the
configuration to the factory default. The easiest way to do this is with a browser.

Enter into your browser.
You should then enter your username and password.
Down the left hand side of the screen you should see a menu, click on “SpeedTouch”.
Towards the centre of the screen “Configuration” should appear. Click on it.
Towards the bottom of the screen, an option “Save or Restore Configuration” should appear. Click on it.
Towards the centre of the screen an option “Backup Configuration Now” should appear. Click on it.
A window will pop up, click on “save”
By default the the configuration will be saved on your PC in a file called user.ini
Click on “SpeedTouch” on the left hand side of the screen.
Towards the bottom of the screen an option “Return to Factory Default Settings” should appear. Click on it.
You will now be asked to confirm that you want to “Reset to Factory Defaults”
click on “Yes, reset my SpeedTouch”.

After a couple of minutes your SpeedTouch should have rebooted and is ready for configuration.
Note, the configuration uses the SpeedTouch Command Line Interface which is case sensitive.

To configure your SpeedTouch you need to establish a telnet session with it e.g.:


When you are prompted for a Username, you should enter Administrator
No password is required.

You should now enter the following commands:

ppp ifdelete intf=Internet

atm ifdetach intf=atm_Internet

atm ifconfig intf=atm_Internet ulp=mac encaps=llc
atm ifattach intf=atm_Internet
eth bridge ifadd intf=Internet
eth bridge ifconfig intf=Internet dest=atm_Internet
eth bridge ifattach intf=Internet

env set var=CONF_SERVICE value=”Bridged PPPoE on 0.38″
ids config state=disabled

system reboot

When your SpeedTouch has rebooted, the configuration is complete.
You should now change the SpeedTouch password, this can be done with your browser.

You should now connect your SpeedTouch to a suitably configured router/firewall.


While setting the mtu size to 1492 is recommended for PPPoA, it is mandatory when using PPPoE. This should be done for all PC’s that wish to connect to the internet, not just the router/firewall.