Solved!  Many thanks.  Details below...

On Thu, Sep 6, 2012 at 11:52 AM, Ian Malone <ibmalone@gmail.com> wrote:
On 6 September 2012 15:28, Stowell Davison <swdavison@gmail.com> wrote:
>
> I recently installed Fedora 17, 64 bit, on an HP h8-1320t.  The machine has
> an on-board ethernet port (RJ-45).  According to the machine's spec sheet,
> that is device is an "Atheros AR8161L".
>
> Fedora does not see that interface device at all.  Dmesg and
> /var/log/messages contain no mention of "Atheros AR8161L" or any useful
> substring thereof.  There are no *eth0* files in
> /etc/sysconfig/network-scripts.
>
> I know that the port hardware works because I was able to make network
> connections from the machine using MS Windows.
>
> Thanks for any suggestions.
>
> Stowe Davison
> http://nic-nac-project.de/~davison
>

This appears to need the alx driver:
http://www.linuxfoundation.org/collaborate/workgroups/networking/alx
 

Solved! 

Many thanks, Ian.  The alx driver from the URL you provided above did the job.  There are installation instructions there on the web site.  There were a couple of glitches in the "make" because I lacked some necessary packages for the build, but the error messages were clear.  The HP h8-1320t is now communicating on its ethernet port.

Thanks again to all who responded.

Stowe Davison