What is Linux Routing and how to configure it?

Dear friend today we will see what is Linux Routing and how to configure it? So let’s start and see step by step this process.

Linux routing is an essential concept that plays a vital role in enabling communication between different networks. It involves the process of forwarding data packets from one network to another through intermediate devices known as routers. This article aims to provide a comprehensive guide on Linux routing, including its definition, benefits, and configuration.

What is Linux Routing?

Routing is the process of directing data packets from one network to another by finding the most efficient path to the destination. In the Linux operating system, routing involves the use of the kernel’s routing table, which contains information on how to forward packets to their intended destinations.

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The Linux kernel supports several routing protocols, including Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Border Gateway Protocol (BGP). These protocols are used to exchange routing information between routers, enabling them to determine the best path to the destination.

Benefits of Linux Routing

Linux routing provides several benefits, including:

  1. Improved network performance: Routing enables data packets to be transmitted efficiently between networks, leading to faster data transfer and reduced latency.
  2. Increased network security: Routing enables the creation of separate networks with different security policies, reducing the risk of unauthorized access and data breaches.
  3. Better network scalability: Routing allows networks to be expanded by adding new subnets and routers without affecting the existing network.

How to configuration Linux Routing?

Configuring Linux routing involves several steps, including:

Step 1: Enabling IP forwarding

IP forwarding is a feature that enables the Linux kernel to forward packets between networks. To enable IP forwarding, run the following command:

echo 1 > /proc/sys/net/ipv4/ip_forward

Step 2: Configuring network interfaces

Network interfaces are the physical or virtual connections that connect the Linux machine to the network. Each interface is assigned a unique IP address and subnet mask.

To configure a network interface, edit the interface configuration file located in the /etc/network/interfaces directory. For example, to configure the eth0 interface, run the following command:

sudo nano /etc/network/interfaces.d/eth0.cfg

Add the following lines to the configuration file:

Linux Routing

Replace <ip_address>, <subnet_mask>, and <default_gateway> with the appropriate values for your network.

Step 3: Adding routes to the routing table

To add a route to the routing table, use the ip route add command. For example, to add a route to the network via the router, run the following command:

sudo ip route add via

This command adds a route to the routing table that directs all packets destined for the network to the router.

Step 4: Testing connectivity

To test connectivity between networks, use the ping command. For example, to test connectivity to the host, run the following command:


This command sends a series of ICMP echo requests to the host and displays the response times.


In conclusion, Linux routing is a critical aspect of network communication, enabling efficient data transfer between different networks. It provides several benefits, including improved network performance, increased security, and better scalability. Configuring Linux routing involves enabling IP forwarding, configuring network interfaces, adding routes to the routing table, and testing connectivity. With the right configuration.

You can also check this link for Network Bonding in Linux.

Network Bonding configuration on CentOS 7 and RHEL 7

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