The problem of this pc is upon installation of Centos 5.7, the network is up but if you ping the other pc its just saying “Destination unreachable”.
The fix for this problem is this:
1) Download the http://sourceforge.net/projects/e1000/ driver from that site. Note the e1000 not e100, this is gigabit..
2) tar xfz e1000-<x.x.x>.tar.gz
3) cd e1000-<x.x.x>/src/
4) make install
5) modprobe e1000
After doing the the #5, do the command service network restart in the CLI.