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 46: IP

V

6 M

ANGEMENT

 C

ONFIGURATION

In the IPv6 network, a domain name system (DNS) supporting IPv6 converts 
domain names into IPv6 addresses. Different from an IPv4 DNS, an IPv6 DNS 
converts domain names into IPv6 addresses, instead of IPv4 addresses.

However, just like an IPv4 DNS, an IPv6 DNS also covers static domain name 
resolution and dynamic domain name resolution. The function and 
implementation of these two types of domain name resolution are the same as 
those of an IPv4 DNS. For details, refer to “DNS Configuration” on page 549.

Usually, the DNS server connecting IPv4 and IPv6 networks contain not only A 
records (IPv4 addresses) but also AAAA records (IPv6 addresses). The DNS server 
can convert domain names into IPv4 addresses or IPv6 addresses. In this way, the 
DNS server has the functions of both IPv6 DNS and IPv4 DNS.

Protocol specifications related to IPv6 include:

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RFC 1881: IPv6 Address Allocation Management

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RFC 1887: An Architecture for IPv6 Unicast Address Allocation

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RFC 1981: Path MTU Discovery for IP version 6

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RFC 2375: IPv6 Multicast Address Assignments

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RFC 2460: Internet Protocol, Version 6 (IPv6) Specification.

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RFC 2461: Neighbor Discovery for IP Version 6 (IPv6)

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RFC 2462: IPv6 Stateless Address Autoconfiguration

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RFC 2463: Internet Control Message Protocol (ICMPv6) for the Internet 
Protocol Version 6 (IPv6) Specification

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RFC 2464: Transmission of IPv6 Packets over Ethernet Networks

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RFC 2526: Reserved IPv6 Subnet Anycast Addresses

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RFC 3307: Allocation Guidelines for IPv6 Multicast Addresses

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RFC 3513: Internet Protocol Version 6 (IPv6) Addressing Architecture

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RFC 3596: DNS Extensions to Support IP Version 6

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An IPv6 address is required for a host to access an IPv6 network. A host can be 
assigned a global unicast address, a site-local address, or a link-local address.

Table 386   Complete these tasks to configure IPv6:

Required 

Optional 

Optional 

Optional 

Optional 

Optional 

Optional