532 CHAPTER 46: IPV 6 MANGEMENT CONFIGURATIONIntroduction to IPv6 DNS In the IPv6 network, a domain name system (DNS) supporting IPv6 convertsdomain names into IPv6 addresses. Different from an IPv4 DNS, an IPv6 DNSconverts domain names into IPv6 addresses, instead of IPv4 addresses.However, just like an IPv4 DNS, an IPv6 DNS also covers static domain nameresolution and dynamic domain name resolution. The function andimplementation of these two types of domain name resolution are the same asthose 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 Arecords (IPv4 addresses) but also AAAA records (IPv6 addresses). The DNS servercan convert domain names into IPv4 addresses or IPv6 addresses. In this way, theDNS server has the functions of both IPv6 DNS and IPv4 DNS.Protocols and Standards Protocol specifications related to IPv6 include:■ RFC 1881: IPv6 Address Allocation Management■ RFC 1887: An Architecture for IPv6 Unicast Address Allocation■ RFC 1981: Path MTU Discovery for IP version 6■ RFC 2375: IPv6 Multicast Address Assignments■ RFC 2460: Internet Protocol, Version 6 (IPv6) Specification.■ RFC 2461: Neighbor Discovery for IP Version 6 (IPv6)■ RFC 2462: IPv6 Stateless Address Autoconfiguration■ RFC 2463: Internet Control Message Protocol (ICMPv6) for the InternetProtocol Version 6 (IPv6) Specification■ RFC 2464: Transmission of IPv6 Packets over Ethernet Networks■ RFC 2526: Reserved IPv6 Subnet Anycast Addresses■ RFC 3307: Allocation Guidelines for IPv6 Multicast Addresses■ RFC 3513: Internet Protocol Version 6 (IPv6) Addressing Architecture■ RFC 3596: DNS Extensions to Support IP Version 6IPv6 ConfigurationTask ListConfiguring an IPv6Unicast Address■ An IPv6 address is required for a host to access an IPv6 network. A host can beassigned a global unicast address, a site-local address, or a link-local address.Table 386 Complete these tasks to configure IPv6:Task Remarks“Configuring an IPv6 Unicast Address” Required“Configuring IPv6 NDP” Optional“Configuring a Static IPv6 Route” Optional“Configuring IPv6 TCP Properties” Optional“Configuring the Maximum Number of IPv6 ICMP Error Packets Sentwithin a Specified Time”Optional“Configuring IPv6 DNS” Optional“Displaying and Maintaining IPv6” Optional
