This post will explain the way to add new static routes in Linux (RH).
The old way to do this was to add the route lines to /etc/rc.local.
The currently way to do this is to create a file named route-{Device Name} (Ex: route-eth0)
in /etc/sysconfig/network-scripts, and add the new routes for this device to the file in this format:
GATEWAY0=10.10.0.1
NETMASK0=255.0.0.0
ADDRESS0=10.0.0.0
GATEWAY1=10.2.0.1
NETMASK1=255.255.0.0
ADDRESS1=192.168.0.0
NOTE: http://kbase.redhat.com/faq/FAQ_79_2561.shtm
Oded.