<appendix id="X-087-2-appendix.brewery"><title>Example Network:<?lb>The Virtual Brewery</title>

<indexterm><primary>Virtual Brewery</primary></indexterm>
<indexterm><primary>Brewery, Virtual</primary></indexterm>

<para>
Throughout this book we've used the following example that is a little less
complex than Groucho Marx University and may be closer to the tasks you will
actually encounter.
</para>

<para>
The Virtual Brewery is a small company that brews, as the name suggests,
virtual beer. To manage their business more efficiently, the virtual brewers
want to network their computers, which all happen to be PCs running the
brightest and shiniest production Linux kernel. <xref linkend = "x-087-2-appendix.brewery.diagram"> shows the network configuration.
</para>

<para>
On the same floor, just across the hall, there's the Virtual Winery, which
works closely with the brewery.  The vintners run an Ethernet of their own.
Quite naturally, the two companies want to link their networks once they are
operational.  As a first step, they want to set up a gateway host that
forwards datagrams between the two subnets. Later, they also want to have a
UUCP link to the outside world, through which they exchange mail and news. In
the long run, they also want to set up PPP connections to connect to offsite
locations and to the Internet.
</para>

<para>
The Virtual Brewery and the Virtual Winery each have a class C subnet of 
the Brewery's class B network, and gateway to each other via the host
<systemitem role="sitename">vlager</systemitem>, which also supports the
UUCP connection. <xref linkend = "x-087-2-appendix.brewery.subsidiary"> shows the configuration.
</para>

<figure id="X-087-2-appendix.brewery.diagram">
<title>The Virtual Brewery and Virtual Winery subnets</title>
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<figure id="X-087-2-appendix.brewery.subsidiary">
<title>The Virtual Brewery Network</title>
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<sect1><title>Connecting the Virtual Subsidiary Network</title>
<para>
The Virtual Brewery grows and opens a branch in another city. The
subsidiary runs an Ethernet of its own using the IP network number
<systemitem role="sitename">172.16.3.0</systemitem>, which is subnet 3 of the
Brewery's class B network. The host
<systemitem role="sitename">vlager</systemitem> acts as the gateway for the
Brewery network and will support the PPP link; its peer at the new branch is
called <systemitem role="sitename">vbourbon</systemitem> and has an IP address
of <systemitem role="sitename">172.16.3.1</systemitem>. This network is
illustrated in <xref linkend="X-087-2-appendix.brewery.subsidiary">.
</para>

<para>
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</para>

<para>
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</para>

<para>
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</para>
</sect1>

</appendix>

