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Cisco Configuration

A collection of 19 posts

Password Recovery Procedure for Cisco Routers

Password Recovery Procedure for Cisco Routers

One of the problems that you may find yourself in is that you are not able to access a router due to not knowing the password. This can happen in various scenarios, for example if a network engineer has left the company and has not divulged the password details, or

'Login local' on a Cisco Router

'Login local' on a Cisco Router

When configuring access to a Cisco router, you have several options for authentication. One common method is using login local, which authenticates users against locally configured usernames and passwords stored on the router itself. What is Login Local? The login local command tells the router to authenticate users using the

Configuring SSH (Secure Shell) on a Cisco device

Configuring SSH (Secure Shell) on a Cisco device

SSH (Secure Shell) provides a secure way to connect to and manage network devices remotely. Unlike Telnet, which sends data in plain text, SSH encrypts all communication between the client and server, making it the preferred method for remote administration. This guide will show you how to configure SSH on

Configuring DHCP on a Cisco router

Configuring DHCP on a Cisco router

Introduction DHCP (Dynamic Host Configuration Protocol) is a network protocol that automatically assigns IP addresses and other network configuration parameters to devices on a network. Instead of manually configuring each device with a static IP address, DHCP allows devices to request and receive network settings automatically. In this tutorial, we&

Configuring PPP Encapsulation

Configuring PPP Encapsulation

Point-to-Point Protocol (PPP) is a data link layer protocol that is used to establish a direct connection between two network nodes. It is commonly used for serial connections, dial-up connections, and VPNs. PPP provides features such as authentication, compression, and error detection. In this article, we'll learn how

Clock rate and Bandwidth commands

Clock rate and Bandwidth commands

Two commands in Cisco router configuration that often cause confusion are the clock rate and bandwidth commands. Let me explain the difference between these two important interface configuration commands. Clock Rate Command The clock rate command is used on serial interfaces to set the actual physical transmission speed of the

Configuring RIP on a Cisco Router

Configuring RIP on a Cisco Router

In this article, I will configure RIP (Routing Information Protocol) on a few Cisco routers in Packet Tracer to demonstrate how to set up dynamic routing with RIP. We'll look at the basic RIP configuration and some useful verification commands. I'll be using the following network

Default Gateway of Last Resort

Default Gateway of Last Resort

Let's explore the concept of the default gateway of last resort and how to configure it on Cisco routers. The default gateway of last resort is a route that a router uses when no specific route exists for a destination network in its routing table. It's

Static Routing

In this post, I want to demonstrate static routing and how it can be used. A static route is a configuration on a router that specifies how to reach a particular network. We manually specify the path packets must take to reach their destination. Let me demonstrate this with a

Interface Status

Interface Status

Interface Status There are several different statuses that interfaces can be in. The most common are: * Up/Up - This means the interface is functioning normally. Both the physical layer (layer 1) and the data link layer (layer 2) are operational. * Up/Down - This indicates that the physical connection

Configuring an IP address on a Cisco Device

Configuring an IP address on a Cisco Device

Configure a static IP address on an interface To configure a static IP address on an interface, you need to enter interface configuration mode and then use the ip address command to assign the IP address and subnet mask. Here's how to do it: Router> enable Router#

The difference between Run and Start and how to save!

The difference between Run and Start and how to save!

In this post I am going to explain the difference between the running and startup configuration files that are stored on Cisco devices. I will show you how to view both of these configuration files and how to save changes from the running to the startup configuration file (or vice

Banner - Message Of The Day (MOTD)

Banner - Message Of The Day (MOTD)

Setting up a Banner or Message of the Day (MOTD) Setting up a banner or Message of the Day (MOTD) on your Cisco devices is an important security and administrative practice. A banner provides information to users connecting to your device, whether they're legitimate administrators or unauthorized individuals

Using the Pipe '|' command

Using the Pipe '|' command

When working with the Cisco command line interface (CLI), it is very common to see long outputs. When looking at items like the running configuration or the routing table, you will often find that the output spans many pages. This makes it difficult to read and find the information you

The "do" command

The "do" command

Objective To understand the do command and its functionality within Cisco IOS. Topology We will only be using one router for this tutorial. R1 The Problem It's annoying having to exit from config mode to exec mode every time you want to run a show command. Or from

Setting the enable password and secret on a Cisco device

Setting the enable password and secret on a Cisco device

The enable password and enable secret are used to restrict access to privileged EXEC mode (also known as enable mode) on Cisco devices. Let's explore the differences between them and how to configure each. The difference between enable password and enable secret Both the enable password and enable

Configuring the Console port on a Cisco Device

Configuring the Console port on a Cisco Device

The console port on a Cisco device is primarily used for out-of-band management. This is usually the primary method of configuring a device for the first time. All Cisco routers and switches have a console port. Let me show you how to configure the console port on a Cisco device.

Configuring VTY Access

Configuring VTY Access

Introduction VTY (Virtual Teletype) lines are virtual interfaces on Cisco devices that allow remote access via Telnet or SSH. Configuring VTY access is essential for remote device management, making it one of the fundamental skills every network administrator must master. Understanding VTY Lines Cisco devices typically have multiple VTY lines

Navigating a Cisco device

Navigating a Cisco device

User Mode The first privilege mode you enter when you successfully access a Cisco device is the user mode. This mode allows you to execute a limited set of commands, mostly monitoring and troubleshooting commands. The prompt for user mode is: Router> Privileged Mode (Enable Mode) To access more