In this scenario,
<systemitem>RouterA
</systemitem> is a FreeBSD machine that is acting as a router to the rest of the Internet. It has a default route set to
<systemitem class="ipaddress">10.0.0.1
</systemitem> which allows it to connect with the outside world.
<systemitem>RouterB
</systemitem> is already configured to use
<systemitem class="ipaddress">192.168.1.1
</systemitem> as its default gateway.