Adding persistent static routes in Redhat.. [NISTnet installed...!]

bala1987 · 05-25-2009, 12:36 AM

Hi,

#1
How can i add static routes in RHEL.
Do i have to change "/etc/sysconfig/network-scripts/ifcfg-eth0" file i.e whether I have to add some routes towards the end of file.

And, what should be the format while adding the routes.

[when I add routes using 'route add -net', they disappear after I reboot the machine ]

#2
How can I make a script getting called automatically if the system reboots. eg. Assuming, I got a ScriptFile in "/root" which has to be called on system reload. I don't want to run it everytime by giving "./ScriptFIle" in terminal.

rayfordj · 05-25-2009, 10:13 AM

kbase.redhat.com: using static routes

What is the correct syntax, using the 'ip' command, I can use to add or delete static routes from the system's IP routing table?

I am trying to configure static routes in Red Hat Enterprise Linux 3. Why do I keep getting an error that says 'Error: an inet prefix is expected rather than...' whenever I try and activate the static route?

It has been a few years since I last touched a RHEL3 installation and I no longer have one for reference...
In RHEL4 and RHEL5 (so i suspect it might be the same in RHEL3), one of the last items to get called from ifup-post is /sbin/ifup-local if it exists. It is a script that you'll create and takes a single argument (the interface; ex. eth0). Here is where you'll set the static routes that need to be added when the interface is activated. likewise, there is an /sbin/ifdown-local to handle things when the interface is deactivated.

an example /sbin/ifup-local:

Code:

#!/bin/bash
#
# my custom routing example for eth1 interface
#
if [ $1 = 'eth1']; then
   /sbin/ip route add 192.168.1.0/24 via 10.10.1.101 dev eth1
fi
#
#

bala1987 · 05-26-2009, 08:58 AM

Hey, I found out the answer from red hat documentation..

Here's the answer.

Just create the file like this in /etc/sysconfig/network-scripts/

[root@localhost network-scripts]# cat route-eth0
50.1.0.0/16 via 50.44.0.1 dev eth0
50.2.0.0/16 via 50.44.0.1 dev eth0
200.30.0.0/16 via 50.44.0.1 dev eth0

And also add the routes for the other interface in the file route-eth1

[Actually I am using a 2 NIC linux machine..!!!]