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Product: Active & Wireless IPv4 vs IPv6 (part 2)

Family Compatibility of Switches, Radios and Routers IPv4 addresses with IPv6

he IPv4 address compatible • Tunneling with the IPv6 address is a special This concept is not new; many T class of IPv6 address, it is a IPv6 people use tunneling frequently, address whose first 96 are zeroes, but just use it for other reasons. while the last 32 represent the IPv4 E.g.: many businesses use IPsec or addresses. Secure Sockets Layer (SSL) tunnels Important Note: It is to secure information when it is being important to highlight that the IPv6 transmitted through an untrusted address :: and the Loopback address: network. ::1) are not IPv4 compatible even There are many different 5 tunneling methods available. The though they are included in the IPv6 selection depends on the specific ::/96 . implementation details. Table 1 lists some commonly available tunneling There are a series of methods and their suggested usage. mechanisms that will permit the coexistence and progressive migration Tunneling of the networks and user equipment. Suggested Application Method In general, the transition mechanisms can be classified in three groups: Used to provide a point- to-point IPv6 link over an Manual existing IPv4 network; only supports IPv6 traffic. Used to provide a point- • Dual Stack to-point IPv6 link over an GRE existing IPV4 network; When configured as dual stack, each supports multiple protocols, device on the network is configured including IPv6. with both an IPv4 address and an Used to provide a point-to- IPv6 address, the motus behind that multipoint IPv6 link over an is that once all the devices have existing IPv4 network; sites implemented IPv6, the IPv4 part must use IPv6 addresses of the network will be discarded. from the 2002::/16 range. This method is usual for businesses Used to provide a point-to- multipoint IPv6 link over an 6rd looking to progressively migrate their existing IPv4 network; sites (or 6RD) existing devices from IPv4 to IPv6. can use IPv6 addresses from These businesses can configure their any range. infrastructure to support Used to provide point-to- both IPv4 and IPv6 but incorporate multipoint IPv6 links over their other network devices to IPv6 ISATAP an existing IPv4 network. Designed to be used between at a slower pace. devices inside the same site.

Designed and Manufactured under LanPro™ standards and specifications. LanPro™ is a member of One Network Alliance Group of Companies. LanPro™, How Information Moves... and LanProfessional are US registered brands. • Translation in ability to provide protocol translation services for This is not a new concept to most network engineers; this Control Message Protocol (ICMP), is because Network Address File Transfer Protocol (FTP), and Translation (NAT) is implemented (DNS). The between different IPv4 networks component that was responsible in almost every residential for these translation services is household. The concept behind this type of NAT and the newer called the application layer gateway technologies that support address (ALG). translation between IPv4 and IPv6 networks is similar. IPv6 The ALG piece of the NAT- translation technologies differ PT method raised a number of from IPv6 tunneling technologies; this is because the translation issues. With additional testing and technologies enable IPv4-only real-life experience, a new method devices to speak to IPv6-only was introduced that separated the devices, which is not possible with address translation functionality any of the tunneling methods. and the application layer translation functionalities: NAT64 and DNS64. However, IPv4/IPv6 translation and IPv4-only DNS64 can synthesize IPv6 translation entail a certain amount address resource records (AAAA) of complexity. What happens when from IPv4 resource records (A); it an IPv6-only device is attempting does this by encoding the returned to communicate with a device on IPv4 address into a IPv6 address the public IPv4 Internet and only format. an IPv4 DNS record (A) exists? In these situations, a secondary There are tools in Internet technology is required to step in that ease the translation of these and provide additional services for addresses like the following: the connection to work. Some examples of online The first method to be applications from IPv4 to IPv6 on introduced to provide IPv6 address conversion, translation services was Network Address Translation - Protocol http://www.subnetonline.com/pages/subnet- Translation (NAT-PT). NAT- calculators/-to--converter.php PT defined a mechanism to not only translate between IPv4 to https://www.ultratools.com/tools/ipv4toipv6 IPv6 addresses but also a built- http://www.ipaddressguide.com/ipv4-to-ipv6

Some terminology may match with public articles found in Internet.

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Designed and Manufactured under LanPro™ standards and specifications. LanPro™ is a member of One Network Alliance Group of Companies. LanPro™, How Information Moves... and LanProfessional are US registered brands.