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- More IPv6 cleanup

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- Place more emphasis on running out of IPv4 addresses and cite IANA running out of IPv4 addresses.

Reviewed by:	gavin@
This commit is contained in:
Brad Davis 2013-08-27 14:55:38 +00:00
parent 54dee56c67
commit dec90748ab
Notes: svn2git 2020-12-08 03:00:23 +00:00 
svn path=/head/; revision=42592
1 changed files with 17 additions and 9 deletions

26
en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml
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@ -5021,17 +5021,25 @@ redirect_port tcp 192.168.0.3:80 80</programlisting>
<itemizedlist>
<listitem>
<para>Running out of addresses. Today this is not so much of
a concern, since RFC1918 private address space (<hostid
role="ipaddr">10.0.0.0/8</hostid>, <hostid
role="ipaddr">172.16.0.0/12</hostid>, and <hostid
role="ipaddr">192.168.0.0/16</hostid>) and
<acronym>NAT</acronym> are being employed.</para>
<para>Running out of addresses. For years the use of RFC1918
private address space
(<hostid role="ipaddr">10.0.0.0/8</hostid>,
<hostid role="ipaddr">172.16.0.0/12</hostid>, and
<hostid role="ipaddr">192.168.0.0/16</hostid>) 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 Region Registry runs out, there will be no more
available and switching to <acronym>IPv6</acronym> will be
critical.</para>
</listitem>
<listitem>
<para>Router table entries were getting too large. This is
still a concern today.</para>
<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>
@ -5054,7 +5062,7 @@ redirect_port tcp 192.168.0.3:80 80</programlisting>
</listitem>
</itemizedlist>
<para>There are other useful features of
<para>There are many other useful features of
<acronym>IPv6</acronym>:</para>
<itemizedlist>