55 lines
3.6 KiB
HTML
55 lines
3.6 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Stateless address autoconfiguration" />
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<meta name="abstract" content="Stateless address autoconfiguration automates some of the network administrator's tasks. " />
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<meta name="description" content="Stateless address autoconfiguration automates some of the network administrator's tasks. " />
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<meta name="DC.Relation" scheme="URI" content="rzai2ipv6concepts.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="ipv6autoconfig" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Stateless address autoconfiguration</title>
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</head>
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<body id="ipv6autoconfig"><a name="ipv6autoconfig"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Stateless address autoconfiguration</h1>
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<div><p>Stateless address autoconfiguration automates some of the network
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administrator's tasks. </p>
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<p><img src="./delta.gif" alt="Start of change" />Stateless address autoconfiguration is the process
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that IPv6 nodes (hosts or routers) use to automatically configure IPv6 addresses
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for interfaces. The node builds various IPv6 addresses by combining an address
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prefix with either an identifier derived from the MAC address of the node
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or a user-specified interface identifier. The prefixes include the link-local
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prefix (<samp class="codeph">fe80::/10</samp>) and prefixes of length 64 advertised by
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local IPv6 routers (if any exist). <img src="./deltaend.gif" alt="End of change" /></p>
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<p>The node performs duplicate address detection to verify the uniqueness
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of the address before assigning it to an interface. The node sends out a
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neighbor solicitation query to the new address and waits for a response. If
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the node does not receive a response, then the address is assumed to be unique.
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If the node receives a response in the form of a neighbor advertisement, the
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address is already in use. If a node determines that its tentative IPv6 address
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is not unique, then autoconfiguration stops and manual configuration of the
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interface is required.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzai2ipv6concepts.htm" title="Learn basic IPv6 concepts. If you are not sure what the differences are between IPv4 and IPv6, see detailed comparisons, such as how the IPv4 and IPv6 addresses compare to one another, or how IPv4 packet headers differ from IPv6 packet headers.">Concepts: IPv6</a></div>
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</div>
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</div>
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</body>
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</html>
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