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Dual stack
Dual stack is the most direct transition approach. A network node that supports both IPv4 and IPv6 is a
dual-stack node. A dual-stack node configured with an IPv4 address and an IPv6 address can forward
both IPv4 and IPv6 packets. An application that supports both IPv4 and IPv6 prefers IPv6 at the network
layer. Dual stack is suitable for communication between IPv4 nodes or between IPv6 nodes. It is the basis
of all transition technologies. However, it does not solve the IPv4 address depletion issue because each
dual stack node must have a globally unique IPv4 address.
Tunneling
Tunneling uses one network protocol to encapsulate the packets of another network protocol and
transfers them over the network. For more information about tunneling, see "Configuring tunneling."
Protocols and standards
Protocols and standards related to IPv6 include:
• R FC 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 2464, Transmission of IPv6 Packets over Ethernet Networks
• RFC 2526, Reserved IPv6 Subnet Anycast Addresses
• RFC 3307, Allocation Guidelines for IPv6 Multicast Addresses
• R F C 4191, Default Router Preferences and More-Specific Routes
• RFC 4291, IP Version 6 Addressing Architecture
• RFC 4443, Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6)
Specification
• RFC 4861, Neighbor Discovery for IP Version 6 (IPv6)
• RFC 4862, IPv6 Stateless Address Autoconfiguration
IPv6 basics configuration task list
Tasks at a
lance
(Required.) Assigning IPv6 addresses to interfaces:
• Configuring an IPv6 global unicast address
• Configuring an IPv6 link-local address
• Configuring an IPv6 anycast address
(Optional.) Configuring IPv6 ND:
• Configuring a static neighbor entry
• Setting the maximum number of dynamic neighbor entries
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