Date: Fri, 7 Mar 2014 19:59:50 +0000 (UTC) From: Dru Lavigne <dru@FreeBSD.org> To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r44186 - head/en_US.ISO8859-1/books/handbook/advanced-networking Message-ID: <201403071959.s27JxohV018689@svn.freebsd.org>
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Author: dru Date: Fri Mar 7 19:59:50 2014 New Revision: 44186 URL: http://svnweb.freebsd.org/changeset/doc/44186 Log: Initial pass through IPv6 Introduction. It needs a second pass and a mention of how FreeBSD is leading the way with IPv6-only. The rest of this chapter needs a tech review by someone who knows more about IPv6 as the last two sections are still unclear on why/when someone would do this. Sponsored by: iXsystems Modified: head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml Modified: head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml ============================================================================== --- head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml Fri Mar 7 19:36:09 2014 (r44185) +++ head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml Fri Mar 7 19:59:50 2014 (r44186) @@ -4257,69 +4257,32 @@ Received 264951 bytes in 0.1 seconds</sc </authorgroup> </info> - <para><acronym>IPv6</acronym>, also known as - <acronym>IPng</acronym> <quote><acronym>IP</acronym> next - generation</quote>, is the new version of the well known + <para><acronym>IPv6</acronym> is the new version of the well known <acronym>IP</acronym> protocol, also known as - <acronym>IPv4</acronym>. &os; includes the <link - xlink:href="http://www.kame.net/">KAME</link>; - <acronym>IPv6</acronym> reference implementation. &os; comes - with everything needed to use <acronym>IPv6</acronym>. This - section focuses on getting <acronym>IPv6</acronym> configured - and running.</para> - - <para>In the early 1990s, people became aware of the rapidly - diminishing address space of <acronym>IPv4</acronym>. Given - the expansion rate of the Internet, there were two major - concerns:</para> - - <itemizedlist> - <listitem> - <para>Running out of addresses. For years the use of - RFC1918 private address space (<systemitem - class="ipaddress">10.0.0.0/8</systemitem>, <systemitem - class="ipaddress">172.16.0.0/12</systemitem>, and - <systemitem - class="ipaddress">192.168.0.0/16</systemitem>) and NAT - has slowed down the exhaustion. Even though, there are - very few remaining IPv4 addresses. The Internet - Assigned Numbers Authority (<acronym>IANA</acronym>) has - issued the last of the available major blocks to the - Regional Registries. Once each Regional Registry runs - out, there will be no more available and switching to - <acronym>IPv6</acronym> will be critical.</para> - </listitem> - - <listitem> - <para>Every block of IPv4 addresses allocated required - routing information to be exchanged between many routers - on the Internet, and these routing tables were getting - too large to allow efficient routing.</para> - </listitem> - </itemizedlist> - - <para><acronym>IPv6</acronym> deals with these and many other - issues by providing the following:</para> + <acronym>IPv4</acronym>. <acronym>IPv6</acronym> provides several advantages over + <acronym>IPv4</acronym> as well as many new features:</para> <itemizedlist> <listitem> - <para>128 bit address space which allows for + <para>Its 128-bit address space allows for 340,282,366,920,938,463,463,374,607,431,768,211,456 - addresses. This means there are approximately - 6.67 * 10^27 <acronym>IPv6</acronym> addresses per square - meter on the planet.</para> + addresses. This addresses the <acronym>IPv4</acronym> + address shortage and eventual <acronym>IPv4</acronym> + address exhaustion.</para> </listitem> <listitem> <para>Routers only store network aggregation addresses in their routing tables, thus reducing the average space of a - routing table to 8192 entries.</para> + routing table to 8192 entries. This addresses the scalability + issues associated with <acronym>IPv4</acronym>, which required every + allocated block of <acronym>IPv4</acronym> addresses to be + exchanged between Internet routers, causing + their routing tables to become + too large to allow efficient routing.</para> </listitem> </itemizedlist> - <para>There are many other useful features of - <acronym>IPv6</acronym>:</para> - <itemizedlist> <listitem> <para>Address autoconfiguration (<link @@ -4327,16 +4290,11 @@ Received 264951 bytes in 0.1 seconds</sc </listitem> <listitem> - <para>Anycast addresses (<quote>one-out-of - many</quote>).</para> - </listitem> - - <listitem> <para>Mandatory multicast addresses.</para> </listitem> <listitem> - <para><acronym>IPsec</acronym> (<acronym>IP</acronym> + <para>Built-in <acronym>IPsec</acronym> (<acronym>IP</acronym> security).</para> </listitem> @@ -4345,7 +4303,7 @@ Received 264951 bytes in 0.1 seconds</sc </listitem> <listitem> - <para>Mobile <acronym>IP</acronym>.</para> + <para>Support for mobile <acronym>IP</acronym>.</para> </listitem> <listitem> @@ -4354,22 +4312,12 @@ Received 264951 bytes in 0.1 seconds</sc </listitem> </itemizedlist> - - <para>For more information, refer to <link - xlink:href="http://www.kame.net">KAME.net</link></para>; - - <para>Currently <acronym>IPv6</acronym> support for many - applications and services is very good, though for some - software it still needs work. For authoritative information - about the support of <acronym>IPv6</acronym>, please consult - the Official Documentation for the software in - question.</para> - - <para>Web, <acronym>DNS</acronym> and Mail applications and - servers have the best support for <acronym>IPv6</acronym> - because they are the most common use case. Other applications - may have varying degrees of <acronym>IPv6</acronym> - support.</para> + <para>&os; includes the <link + xlink:href="http://www.kame.net/">http://www.kame.net/</link>; + <acronym>IPv6</acronym> reference implementation and comes + with everything needed to use <acronym>IPv6</acronym>. This + section focuses on getting <acronym>IPv6</acronym> configured + and running.</para> <sect2> <title>Background on <acronym>IPv6</acronym> Addresses</title>
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