The Managing IPv4 and IPv6 Addressing module provides you with the instruction and server hardware to develop your hands-on skills in the defined topics. This module includes the following exercises:

  • Configuring a Network to use an ISATAP Router
  • Setting up Network Connectivity Between IPv4 and IPv6 Devices
  • Implementing a 6TO4 Tunnel Address

Lab time: It will take approximately 1 hour to complete this lab.

Exam Objectives

The following exam objectives are covered in this lab:

  • Setting Up an ISATAP Router
  • Testing Network Connectivity for IPv4 and IPv6 Enabled Devices
  • Enabling a 6TO4 Tunnel Address

Exercise 1 - Configuring the Network to use an ISATAP Router

The Intra-Site Automatic Tunnel Addressing Protocol, or ISATAP, is a bridge-over technology that enables IPv4-only networks and devices to communicate with their more evolved IPv6-only counterparts. In this context, an ISATAP router is an essential element of any network; it can be utilized to communicate with more advanced IPv6 networks or devices, or can itself be upgraded from the current IPv4 support to IPv6 support. ISATAP is a built-in feature of Windows Server 2008 and later versions.

In this task, you will configure a Windows Server 2016 host to operate as an ISATAP router. The configuration will enable the host to send out messages offering ISATAP addressing and routing information to ISATAP-enabled devices. This configuration uses CLI commands, as no GUI is currently available to configure these hosts.

Exercise 2 - Setting up Network Connectivity between IPv4 and IPv6 Devices

In Exercise 1, you configured the environment to support an ISATAP router. Next, you will set up a network communication session between the IPv4-only network and the IPv6-only network.

Exercise 3 - Implementing a 6TO4 Tunnel Address

IPv4 uses three blocks of addresses that are treated as private range addresses, namely:

  • - (10/8 prefix)
  • - (172.16/12 prefix)
  • - (192.168/16 prefix)

The above addresses cannot be used for routing traffic on the public Internet, and are typically deployed on a corporate network for intranet traffic. For a device that must receive Internet traffic, like a web server or messaging server, a public IP address is assigned to one of its interfaces to enable the device to communicate with the outside world.

By default, Windows devices are enabled to support IPv4 and IPv6 simultaneously. When moving to an IPv6 protocol stack, a number of transition technologies are available, like ISATAP, Teredo, and 6TO4.

6TO4, which stands for “IPv6 to IPv4,” is a technology where you are tunnelling an IPv6 packet inside an IPv4 frame in an IPv4-only network. 6TO4 requires that a public IP address be statically defined on a network interface. When 6TO4 is enabled, the address will start with “2002” and the remaining hexadecimal digits are created based on the IPv4 public IP address that is configured on the machine.

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