1-10z Dual stack is the most direct transition approach. A network node that supports both IPv4 and IPv6is called a dual stack node. A dual stack node configured with an IPv4 address and an IPv6address can forward both IPv4 and IPv6 packets. For an upper layer application supporting bothIPv4 and IPv6, either TCP or UDP can be selected at the transport layer, while IPv6 stack ispreferred at the network layer. Dual stack is suitable for communication between IPv4 nodes orbetween IPv6 nodes. It is the basis of all transitions technologies. However, it does not solve the IPaddress depletion issue because each dual stack node must have a globally unique IP address.z Tunneling is an encapsulation technology, which utilizes one network protocol to encapsulatepackets of another network protocol and transfer them over the network. For more informationabout tunneling, refer to Tunneling Configuration in the IP Services Volume.z Network Address Port Translation – Protocol Translation (NAPT-PT) is usually applied on a devicebetween IPv4 and IPv6 networks to translate between IPv4 and IPv6 packets, allowingcommunication between IPv4 and IPv6 nodes. It performs IP address translation, and according todifferent protocols, performs semantic translation, for packets. This technology is only suitable forcommunication between pure IPv4 node and pure IPv6 node.The S7900E series Ethernet switches do not support NAT-PT.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 ArchitectureIPv6 Basics Configuration Task ListComplete the following tasks to perform IPv6 basics configuration:Task RemarksConfiguring Basic IPv6 Functions RequiredConfiguring IPv6 NDP Optional
