How to Setup Persistent Static Routes on Linux CentOS 6.4

In the realm of network routing, static routing stands as a unique method. It’s not a routing protocol per se, but a manual configuration of the network route, typically managed by a network system administrator.

In Linux, you can add and delete static routes using the “route” command. However, a significant drawback is that the Linux server will forget the static routes configuration upon reboot. To circumvent this issue and avoid network interruption, you can configure static routes to take effect immediately without rebooting and also apply after the next reboot. These are known as Persistent Static Routes.

This tutorial will guide you through the process of setting up Persistent Static Routes on CentOS 6.4.

Step 1: Immediate Configuration

To make the configuration take effect immediately, run the following command:

route add -net <network> netmask <netmask> gw <gateway_ip> dev <interface>

Here are a couple of examples:

route add -net netmask gw dev eth0
route add -net netmask gw dev eth1

Step 2: Configuration for Next Reboot

To apply the configuration on the next reboot, configure the following in /etc/sysconfig/static-routes:

vi /etc/sysconfig/static-routes

Add the following lines:

any -net netmask gw
any -net netmask gw

By following these steps, you can ensure that your static routes are persistent and will not be lost upon rebooting the server. This is crucial for maintaining a stable and reliable network connection, particularly in a server environment where uptime and connectivity are paramount.

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Commands Mentioned

  • route add -net <network> netmask <netmask> gw <gateway_ip> dev <interface> – This command is used to add a new static route to the network configuration. You replace the placeholders with your network’s specific details.
  • vi /etc/sysconfig/static-routes – This command opens the static-routes file in the vi text editor, where you can add or modify persistent static routes.


Setting up persistent static routes on Linux CentOS 6.4 is a critical task for any network system administrator. It ensures network stability and reliability, particularly in a server environment where uptime and connectivity are paramount. By following the steps outlined in this tutorial, you can effectively configure your static routes to be persistent, thereby avoiding any potential network interruptions. Remember, a well-configured network is the backbone of any successful server environment.

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Whether you’re managing a dedicated, a VPS, or cloud hosting, understanding the intricacies of static routing and its persistence across reboots is a valuable skill. As you continue to enhance your knowledge and skills, remember that the journey of learning never ends. Keep exploring, keep learning, and keep pushing the boundaries of your expertise.

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FAQ Section

  1. What is a static route?

    A static route is a pre-determined path that network information must follow to reach a specific host or network. It’s manually configured and doesn’t change unless a network administrator modifies it.

  2. What is the purpose of persistent static routes?

    Persistent static routes ensure that your static routes configuration remains intact even after a system reboot. This is crucial for maintaining network stability and connectivity.

  3. How do I add a static route in Linux?

    In Linux, you can add a static route using the “route” command followed by specific network details. For example, “route add -net <network> netmask <netmask> gw <gateway_ip> dev <interface>”.

  4. What happens if I don’t set up persistent static routes?

    If you don’t set up persistent static routes, your static routes configuration will be lost every time the Linux server is rebooted. This can lead to network interruptions and connectivity issues.

  5. Why is static routing important in a server environment?

    Static routing is important in a server environment because it provides a reliable and stable path for network traffic. It’s crucial for maintaining uptime and ensuring that data reaches its intended destination.


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