1-11 IPv6 Basics ConfigurationWhen configuring IPv6 basics, go to these sections for information you are interested in:z IPv6 Overviewz IPv6 Basics Configuration Task Listz Configuring Basic IPv6 Functionsz Configuring IPv6 NDPz Configuring PMTU Discoveryz Configuring IPv6 TCP Propertiesz Configuring ICMPv6 Packet Sendingz Configuring IPv6 DNS Clientz Displaying and Maintaining IPv6 Basics Configurationz IPv6 Configuration Examplez Troubleshooting IPv6 Basics ConfigurationThe term “router” or the router icon in this document refers to a router in a generic sense or a Layer 3Ethernet switch running a routing protocol.IPv6 OverviewInternet Protocol Version 6 (IPv6), also called IP next generation (IPng), was designed by the InternetEngineering Task Force (IETF) as the successor to Internet Protocol Version 4 (IPv4). The significantdifference between IPv6 and IPv4 is that IPv6 increases the IP address size from 32 bits to 128 bits.This section covers the following:z IPv6 Featuresz Introduction to IPv6 Addressz Introduction to IPv6 Neighbor Discovery Protocolz IPv6 PMTU Discoveryz Introduction to IPv6 DNSz Protocols and StandardsIPv6 FeaturesHeader format simplificationIPv6 cuts down some IPv4 header fields or move them to the IPv6 extension headers to reduce thelength of the basic IPv6 header. IPv6 uses the basic header with a fixed length, thus making IPv6 packethandling simple and improving the forwarding efficiency. Although the IPv6 address size is four times
