However, it is expected that routers will Information advertised by routers, routers will need to be configuredīy some other means. The autoconfiguration process specified in this document applies only This document defines the Duplicate Address Independent of whether they are obtained via stateless or statefulĪutoconfiguration. The DuplicateĪddress Detection algorithm is performed on all addresses, Given link, nodes run a "duplicate address detection" algorithm onĪddresses before assigning them to an interface. To insure that all configured addresses are likely to be unique on a Switching to another address without a service disruption. A deprecated address should be used only byĪpplications that have been using it and would have difficulty The opening of a new TCP connection) should use a preferred address While in a deprecated state, the use of an address isĭiscouraged, but not strictly forbidden. "deprecated" in anticipation that its current interface binding willīecome invalid. In arbitrary communication is unrestricted. Initially, an address is "preferred", meaning that its use To handle the expiration of address bindings gracefully, anĪddress goes through two distinct phases while assigned to an Lifetime expires, the binding (and address) become invalid and theĪddress may be reassigned to another interface elsewhere in the That indicates how long the address is bound to an interface. IPv6 addresses are leased to an interface for a fixed (possibly The site administrator specifies which type ofĪutoconfiguration to use through the setting of appropriate fields in Stateful and stateless address autoconfiguration may be used Site requires tighter control over exact address assignments. The stateless approach is used when a site is not particularlyĬoncerned with the exact addresses hosts use, so long as they are Stateful autoconfiguration for IPv6 is the subject of future work For example, a hostĬan use stateless autoconfiguration to configure its own addresses,īut use stateful autoconfiguration to obtain other information. Stateful autoconfiguration complement each other. The statefulĪutoconfiguration protocol allows hosts to obtain addresses, otherĬonfiguration information or both from a server. Servers maintain a database that keeps track of whichĪddresses have been assigned to which hosts. In the stateful autoconfiguration model, hosts obtain interfaceĪddresses and/or configuration information and parameters from a RFC 2462 IPv6 Stateless Address Autoconfiguration December 1998 However, link-local addresses are sufficient for allowingĬommunication among nodes attached to the same link. The absence of routers, a host can only generate link-localĪddresses.
An address is formed by combining the two. Hosts generate an "interface identifier" that uniquely identifies an Prefixes that identify the subnet(s) associated with a link, while Information and information advertised by routers. Generate its own addresses using a combination of locally available Stateless autoconfiguration requires no manualĬonfiguration of hosts, minimal (if any) configuration of routers,Īnd no additional servers. IPv6 defines both a stateful and stateless address autoconfiguration APPENDIX A: LOOPBACK SUPPRESSION & DUPLICATE ADDRESSĭETECTION. Creation of Global and Site-Local Addresses. Receiving Neighbor Advertisement Messages. Receiving Neighbor Solicitation Messages. RFC 2462 IPv6 Stateless Address Autoconfiguration December 1998 5.4. Theĭetails of autoconfiguration using the stateful protocol areġ. This documentĭefines the process for generating a link-local address, the processįor generating site-local and global addresses via stateless addressĪutoconfiguration, and the Duplicate Address Detection procedure. Stateless mechanism, the stateful mechanism, or both. Uniqueness on a link, determining what information should beĪutoconfigured (addresses, other information, or both), and in theĬase of addresses, whether they should be obtained through the Process includes creating a link-local address and verifying its This document specifies the steps a host takes in deciding how toĪutoconfigure its interfaces in IP version 6. Distribution of this memo is unlimited.Ĭopyright (C) The Internet Society (1998). Official Protocol Standards" (STD 1) for the standardization stateĪnd status of this protocol. Please refer to the current edition of the "Internet
Internet community, and requests discussion and suggestions for This document specifies an Internet standards track protocol for the
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