The handbook tells you this as well.

On Wed, Apr 23, 2008 at 11:39 AM, <reader@(protected):
>
> "Net Warrior" <netwarrior863@(protected):
>
> > HI there guys.
> > I've already installed gentoo, and wanting to setup the ethernet , trying to
> > use net-setup seems not to be installed, which package do I nneed to install
> > in order to have this util?
> > It seems I missed something.
> >
> > Thanks for your time and support.
> > Greets,
>
> The net-setup tool is on the install cd. Not sure if its a separate
> installable utility in portage.. but an `eix' search of the portage
> database comes up empty.
>
> The way I do is establish a network running the install image cd or
> iso then transfer those settings to the actual install.
>
> But if you've already moved to the fresh install you should be able to
> setup the ethernet by hand with `ifconfig' and `route'.
>
> Then put those setting into /etc/conf.d/net
>                   /etc/conf.d/domainname
>                   /etc/resolv.conf
>
> For manual setup:
>  (assuming eth0 is the device you are going to use)
>
> ifconfig eth0 my.ip.address (in numeric notation like 192.168.0.2) up
> route add default gw my.gateway.addr (in numeric notation)
>
> (if /etc/resolv.conf does not already contain a nameserver to use)
>
>  echo "nameserver my.nameserver.address" > /etc/resolv.conf
>
> And finally, if all goes well.. complete the setup so that it starts
> on bootup with rc-update
>
> rc-update add net.eth0 default (to add it to the default run level)
>
> See if that gets you going...
>
> --
> gentoo-user@(protected)
>
>
--
gentoo-user@(protected)