Basic configuration

Introduction

A router is a networking device whose software and hardware are usually tailored to the tasks of routing and forwarding information. Routers connect two or more logical subnets, which do not necessarily map one-to-one to the physical interfaces of the router.

This tutorial will show step by step instructions to configure a basic router.

Network Diagram

Configuration

Setting enable mode(priveledge exec) password

Log in as router user, default is view mode.

Show running configuration and copy running configuration to startup configuration

We save the configuration to make it persistent  across reboots.

Log in as router user, default is view mode.

Assign IP address to an interface and setting a default route

The router R1 is having two ethernet interface, Fastethernet0 is in the private network and Fastethernet1 is towards the internet, we are assigning IP address 192.168.1.2 to Fastethernet0 and 112.1.1.1 to Fastethernet1.

Configure basic firewall and NAT

Once IP addresses and default route is set, we are configuring NAT to provide internet access to all the hosts in private network and a simple firewall on the traffic coming from private network.We are also saving the configuration to make it persistent on reboot.

This will get you familiar with Okapi Command Line Interface, advanced configuration of various protocols, services and can be found at folowing links: