The issue is that you have to have an eth0 although Fedora 15+ likes to tie it to something else. Take a look at:
http://www.mathworks.com/support/solutions/en/data/1-EUTG50/?solution=1-EUTG50
I had to change a lot of different things, and reboot in order to things to go into affect. The last thing I tried (which worked) was "Update the name in the /etc/sysconfig/network-scripts/ifcfg-* file"
