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It does so independently and without any prior configuration by stateless address autoconfiguration (SLAAC), [46] using a component of the Neighbor Discovery Protocol. This address is selected with the prefix fe80:: / 64 .
Link-local addresses may be assigned manually by an administrator or by automatic operating system procedures. In Internet Protocol (IP) networks, they are assigned most often using stateless address autoconfiguration, a process that often uses a stochastic process to select the value of link-local addresses, assigning a pseudo-random address that is different for each session.
IPv6 hosts configure themselves automatically. Every interface has a self-generated link-local address and, when connected to a network, conflict resolution is performed and routers provide network prefixes via router advertisements. [19] Stateless configuration of routers can be achieved with a special router renumbering protocol. [20]
Operating systems that support neither DHCPv6 nor SLAAC cannot automatically configure unicast IPv6 addresses. Operating systems that support neither DHCPv6 nor ND RDNSS cannot automatically configure name servers in an IPv6-only environment.
IPv6 hosts may automatically generate IP addresses internally using stateless address autoconfiguration (SLAAC), or they may be assigned configuration data with DHCPv6, or both. IPv6 hosts that use stateless autoconfiguration may need information other than what SLAAC provides on a given network.
Since it would not be practical to manually provision networks at scale, in IPv6 networking, DHCPv6 prefix delegation (RFC 3633; RFC 8415 § 6.3) is used to assign a network address prefix and automate configuration and provisioning of the public routable addresses for the network. In the typical case of a home network, for example, the home ...
The Neighbor Discovery Protocol (NDP), or simply Neighbor Discovery (ND), is a protocol of the Internet protocol suite used with Internet Protocol Version 6 (IPv6). [1]: §1 It operates at the internet layer of the Internet model, [2] and is responsible for gathering various information required for network communication, including the configuration of local connections and the domain name ...
Most HOSTS use SLAAC (stateless address auto-configuration) for link-local addresses and most routers do, but you can also manually set them on router which is becoming popular for some network admins. It is very easy to do. read RFC 3513 and scroll down to 2.5.6 Local-Use IPv6 Unicast Addresses.