Date: Fri, 24 May 2013 13:15:37 +0900 (JST) From: Hiroki Sato <hrs@FreeBSD.org> To: trhodes@FreeBSD.org Cc: svn-doc-projects@FreeBSD.org, doc-committers@FreeBSD.org Subject: Re: svn commit: r41721 - projects/ISBN_1-57176-407-0/en_US.ISO8859-1/books/handbook/advanced-networking Message-ID: <20130524.131537.100781632853398978.hrs@allbsd.org> In-Reply-To: <201305231151.r4NBpYaA081350@svn.freebsd.org> References: <201305231151.r4NBpYaA081350@svn.freebsd.org>
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[-- Attachment #1 --] Hi Tom, Tom Rhodes <trhodes@FreeBSD.org> wrote in <201305231151.r4NBpYaA081350@svn.freebsd.org>: tr> Author: trhodes tr> Date: Thu May 23 11:51:34 2013 tr> New Revision: 41721 tr> URL: http://svnweb.freebsd.org/changeset/doc/41721 tr> tr> Log: tr> Discuss (in brief) RFC 3943 sections 3.6 and 3.7. tr> tr> PR: 99506 tr> Reviewed by: bjk tr> tr> Modified: tr> projects/ISBN_1-57176-407-0/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml (snip) tr> + <para>This option may not be required in most cases and is tr> + available only for compatibility while services are updated tr> + to support <acronym>IPv6</acronym>. To enable the feature, tr> + add the following to <filename>/etc/rc.conf</filename>:</para> This part "while services are updated to support IPv6" looks strange to me. IPv4-mapped IPv6 address is required for programs which supports only IPv6 to also support IPv4 on a dual stack node. If this is disabled, IPv6-only programs can work only with IPv6 address. This is not for IPv4-only programs. Although all of IPv6-ready programs in the base system do not use IPv4-mapped IPv6 address for IPv4 sockets regardless of this option, the necessity of this option depends on application (Java, for example). People should also refer Section 4.2 in RFC 4038. -- Hiroki [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (FreeBSD) iEYEABECAAYFAlGe6WkACgkQTyzT2CeTzy0vjQCgwlyLFm4LMWLqCwnx2EctbgRr htIAnA7iucn8PXjQf7lGwPCHOl0zDtMc =4aQZ -----END PGP SIGNATURE-----help
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