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iprange.sgml
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SGML Document
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1996-07-02
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2KB
<!doctype linuxdoc system>
<article>
<title>IP range definitions
<author>Introduction
<abstract>
A <em/DNS/ manages a bunch of relations between names and IP numbers.
Every time one adds a new definition to the <em/DNS/ (a new machine),
he has to find an unused IP number. Further, it has to get some
good knowledge of the network to know which one to use.
A common practice is to document the general organization of the
network, associating IP numbers range to logical part of the
network.
<em/Linuxconf/ allows you to enter this information here and
will use later, making DNS management much nicer.
</abstract>
<sect>Defining IP ranges
<p>
You can define as many IP ranges a you needed. An IP range has
the form <tt/start-limit/. Here are some IP ranges for
different network types.
<descrip>
<tag>192.168.1.1-21</tag>
This defines the first 21 IP numbers of the <em/class C/ network
192.168.1.0.
<tag>172.16.0.1-2.254g</tag>
This defines a huge range in a <em/class B/ network. Note that this
notation won't be used much. This kind of network is often
split into several physical networks, so IP number are allocated.
This is one place where the "IP range definitions" system is
very useful.
</descrip>
<sect>Setting a comment
<p>
For each IP range, you must define a comment clearly identifying the
range later.
<sect>Adding more IP ranges
<p>
At first there is room only for one IP range (and one comment)
in the dialog. Using the button add will expand the dialog, each
time allowing one more range. There is no practical know limit to
this.
<sect>Deleting a range
<p>
Just erase the content of the two lines defining the range
(the range itself and the comment) and use the <em/Accept/ button.
<sect>Adding a new entry in the <em/DNS/
<p>
After setting up you IP ranges, you can go to the
<tt>Add/Edit host information</tt> menu. Every time you edit
one DNS entry, <em/Linuxconf/ will compute the first available
IP number for each IP range definition. These IP number will be
put in the combo box edit field. You will be able to pick an
available IP number without guessing from now on.
</article>