IPv6

When connected via cable or Wi-Fi, registered network adapters will obtain IPv6 connectivity automatically. DHCPv6 is used to obtain an IPv6 address and DNS server address; Router Advertisements for obtaining the default gateway.

In case of issues:

• If you have disabled IPv6 through registry, you will need to revert that change to obtain IPv6 connectivity.
• Check your network adapter properties. Under loaded protocols, TCP/IPv6 should be enabled (the checkbox should be checked). Also check, in protocol properties, whether automatic address configuration is enabled. Eventually, if nothing else helps, reboot your computer, and then, if the issue is still not resolved, email us at admin@sin.cvut.cz.

For IPv6 working correctly on our network in Linux, you will need a DHCPv6 client. Most user-friendly distributions already have one (Ubuntu, for example), and the common DHCP clients, such as dhclient or dhcpcd, already work with DHCPv6. If in doubt, please consult the documentation of your Linux distribution.

If you want to test basic IPv6 connectivity on your machine, navigate to http://www.nebezi.cz/. If the page does not load at all, IPv6 is not working for you. If it does, congratulations! For more thorough test, navigate to http://test-ipv6.com/ (works with or without IPv6).

Your IPv6 address should start with 2001:718:2:880: or 2001:718:2:8a0:.

1. Please, try the following steps:
   1. Click Start, type “devmgmt.msc” in the search bar and press Enter. This would open up the Device manager for you.
   2. Click View and select “Show hidden devices”.
   3. Now expand the Network Adapters section and delete all Tunnel adapter Local Area Connections.
2. Please, try the following steps and see how it works:
   
   1. Click Start, type cmd in the Start Search box, right click the cmd.exe, and then click Run as Administrator.
   2. In the Command Prompt, type netsh int isa set state disabled, and press Enter.
3. Download the reg file and save to desktop. Double click on the saved file to merge into registry, reboot to take effect. Disabling the isatap will work to remove the Ipconfig reference. However unlike other protocols, you cannot disable IPv6 by disabling the protocol on each of your network interfaces. While that will disable the protocol for the interfaces the loopback and tunnel interfaces will still have it enabled.