1-91) The source host uses its MTU to send packets to the destination host.2) If the MTU supported by a forwarding interface is smaller than the packet size, the forwardingdevice will discard the packet and return an ICMPv6 error packet containing the interface MTU tothe source host.3) After receiving the ICMPv6 error packet, the source host uses the returned MTU to send packets tothe destination.4) Step 2 to step 3 are repeated until the destination host receives the packet. In this way, theminimum MTU of all links in the path from the source host to the destination host is determined.Introduction to IPv6 DNSIPv6 Domain Name System (DNS) is responsible for translating domain names into IPv6 addresses,instead of IPv4 addresses.Like IPv4 DNS, IPv6 DNS also involves static domain name resolution and dynamic domain nameresolution. The function and implementation of these two types of domain name resolution are the sameas those of IPv4 DNS. For details, refer to DNS Configuration in the IP Services Volume.Usually, the DNS server connecting IPv4 and IPv6 networks not only contains A records (IPv4addresses), but also AAAA records (IPv6 addresses). The DNS server can convert domain names intoIPv4 addresses or IPv6 addresses. In this way, the DNS server implements the functions of both IPv6DNS and IPv4 DNS.Protocols and StandardsProtocols and standards related to IPv6 include:z RFC 1881: IPv6 Address Allocation Managementz RFC 1887: An Architecture for IPv6 Unicast Address Allocationz RFC 1981: Path MTU Discovery for IP version 6z RFC 2375: IPv6 Multicast Address Assignmentsz RFC 2460: Internet Protocol, Version 6 (IPv6) Specification.z RFC 2461: Neighbor Discovery for IP Version 6 (IPv6)z RFC 2462: IPv6 Stateless Address Autoconfigurationz RFC 2463: Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6)Specificationz RFC 2464: Transmission of IPv6 Packets over Ethernet Networksz RFC 2526: Reserved IPv6 Subnet Anycast Addressesz RFC 3307: Allocation Guidelines for IPv6 Multicast Addressesz RFC 3513: Internet Protocol Version 6 (IPv6) Addressing Architecturez RFC 3596: DNS Extensions to Support IP Version 6IPv6 Basics Configuration Task ListComplete the following tasks to perform IPv6 basics configuration:Task RemarksConfiguring Basic IPv6 Functions RequiredConfiguring IPv6 NDP OptionalConfiguring PMTU Discovery OptionalConfiguring IPv6 TCP Properties Optional
