66 lines
4.7 KiB
HTML
66 lines
4.7 KiB
HTML
<?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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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="IPv6 address formats" />
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<meta name="abstract" content="The size and format of the IPv6 address expand addressing capability." />
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<meta name="description" content="The size and format of the IPv6 address expand addressing capability." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Identifier" content="ipv6addrformat" />
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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>IPv6 address formats</title>
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</head>
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<body id="ipv6addrformat"><a name="ipv6addrformat"><!-- --></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">IPv6 address formats</h1>
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<div><p>The size and format of the IPv6 address expand addressing capability.</p>
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<p><img src="./delta.gif" alt="Start of change" />The IPv6 address size is 128 bits. The preferred IPv6 address
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representation is: <samp class="codeph">x:x:x:x:x:x:x:x</samp>, where each <samp class="codeph">x</samp> is
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the hexadecimal values of the eight 16-bit pieces of the address. IPv6 addresses
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range from <samp class="codeph">0000:0000:0000:0000:0000:0000:0000:0000</samp> to <samp class="codeph">ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff</samp>.<img src="./deltaend.gif" alt="End of change" /></p>
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<div class="p">In addition to this preferred format, IPv6 addresses might be specified
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in two other shortened formats: <dl><dt class="dlterm">Omit leading zeros</dt>
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<dd>Specify IPv6 addresses by omitting leading zeros. For example, IPv6 address <samp class="codeph">1050:0000:0000:0000:0005:0600:300c:326b</samp> can
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be written as <samp class="codeph">1050:0:0:0:5:600:300c:326b</samp>.</dd>
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<dt class="dlterm">Double colon</dt>
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<dd>Specify IPv6 addresses by using double colons (<samp class="codeph">::</samp>) in
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place of a series of zeros. For example, IPv6 address <samp class="codeph">ff06:0:0:0:0:0:0:c3</samp> can
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be written as <samp class="codeph">ff06::c3</samp>. Double colons can be used only once
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in an IP address.</dd>
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</dl>
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</div>
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<p>An alternative format for IPv6 addresses combines the colon and dotted
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notation, so the IPv4 address can be embedded in the IPv6 address. Hexadecimal
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values are specified for the left-most 96 bits, and decimal values are specified
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for the right-most 32 bits indicating the embedded IPv4 address. This format
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ensures compatibility between IPv6 nodes and IPv4 nodes when you are working
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in a mixed network environment.</p>
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<p><img src="./delta.gif" alt="Start of change" />IPv4-mapped IPv6 address uses this alternative format. This
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type of address is used to represent IPv4 nodes as IPv6 addresses. It allows
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IPv6 applications to communicate directly with IPv4 applications. For example, <samp class="codeph">0:0:0:0:0:ffff:192.1.56.10</samp> and <samp class="codeph">::ffff:192.1.56.10/96</samp> (shortened format).<img src="./deltaend.gif" alt="End of change" /></p>
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<p><img src="./delta.gif" alt="Start of change" />All of these formats are valid IPv6 address formats. You
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can specify these IPv6 address formats in iSeries™ Navigator except IPv4-mapped
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IPv6 address.<img src="./deltaend.gif" alt="End of change" /></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> |