How to Configure Telnet on Cisco Router in GNS3? – Configuring Telnet on Cisco Routers or Cisco Switches using GNS3 is a very simple process. In this article, we will create a real network topology using VMware Workstation and GNS3 programs and then make a Telnet connection to Cisco Router using Putty.
How to Configure Telnet on Cisco Router in GNS3?

How to Configure Telnet on Cisco Router in GNS3?

To configure Telnet on the Cisco Router, you first need to connect the Router to your computer via Console. After you have connected the Cisco Router Console, you can configure the basic settings and enable Telnet to manage your device from a remote location.

Once you have configured Telnet on Cisco Router, you can connect to the Router over the LAN or WAN and make all your configurations.

There is a big difference between GNS3 and Cisco Packet Tracer programs. You can use all of the Cisco IOS commands using GNS3. In Packet Tracer, some commands may not be supported. Before moving on to configure Telnet with GNS3, install the GNS3 program to your computer. If you are using one of the Windows, Linux or MacOS operating systems, you can install GNS3 by referring to the following articles.

After you have done the GNS3 setup, you can do a virtual machine installation on VMware Workstation and then move on to the steps of configuring Telnet with GNS3.

How to Enable Telnet on Cisco Router/Switch on GNS3?

Follow the steps below in order to configure Telnet on Cisco Router using GNS3 and VMware virtual machines.

   Step 1

To add a Cisco Router to the GNS3 workspace, click the Router symbol.

How to Configure Telnet on Cisco Router in GNS3?

   Step 2

In the window that opens, select a Cisco Router that you added to GNS3 and drag and drop it to the workspace.

How to Configure Telnet on Cisco Router in GNS3?

   Step 3

Click All Devices to add the Cisco Switch and PC.

How to Configure Telnet on Cisco Router in GNS3?

   Step 4

Drag and drop the Switch to the workspace.

How to Configure Telnet on Cisco Router in GNS3?

   Step 5

Add a Host to include any virtual machine on VMware Workstation into the network topology.

How to Configure Telnet on Cisco Router in GNS3?

   Step 6

To wire the network devices on GNS3, click the cable option as you see in the image below. If you see the crossed (X) symbol, it means that the cabling option is active.

The point to note here is that in the Host setting, you add a VMnet that you configured on your computer in the Ethernet NIO section. In this article, we configured VMnet3 in VMware’s Virtual Network Editor program.

How to Configure Telnet on Cisco Router in GNS3?

   Step 7

A Green Icon will appear on the Switch and PC after you have wired the network devices. The Red Icon on the Cisco Router means that the Router is not working.

How to Configure Telnet on Cisco Router in GNS3?

VMware VMnet Settings for GNS3 Telnet Configuration

VMnet3 Adapter Setting of Physical Computer

   Step 8

On your physical computer, open Network and Internet Settings and configure the VMnet3 network adapter. Normally the IP address here is 192.168.8.1. However, when designing a network, routers usually have an IP address of .1. So it is useful to change the IP address on VMnet so that it not to cause complexity.

How to Configure Telnet on Cisco Router in GNS3?

   Step 9

Open the VMware Virtual Network Editor program and configure the IP block of VMnet3 as 192.168.8.0/24. Also, select Host-Only for VMnet3 and save the settings.

How to Configure Telnet on Cisco Router in GNS3?

   Step 10

Change the network adapter setting of the VMware virtual machine to VMnet3 in the Custom option.

How to Configure Telnet on Cisco Router in GNS3?

   Step 11

After completing the necessary preparations to configure Telnet on Cisco Router in GNS3, run the Cisco Router.

How to Configure Telnet on Cisco Router in GNS3?

   Step 12

Double-click to open the Cisco Router CLI command prompt. To enable Telnet, execute the commands below.

R1# conf t
R1(config)# interface fastethernet0/0
R1(config-if)# ip address 192.168.8.1 255.255.255.0
R1(config-if)# no shutdown
R1(config-if)# exit
R1(config)# line vty 0 4
R1(config-line)# login local
R1(config-line)# exit
R1(config)# username cisco privilege 15 password cisco123
R1(config)# exit
R1# wr

 

How to Configure Telnet on Cisco Router in GNS3?

   Step 13

Download the Putty to your computer from the links at the bottom of the article and copy it to the VMware virtual machine. Open Putty and select Telnet.

How to Configure Telnet on Cisco Router in GNS3?

   Step 14

After you select Telnet, type the IP address of the FastEthernet 0/0 of Cisco Router and click the Open button.

How to Configure Telnet on Cisco Router in GNS3?

   Step 15

You have successfully made a Telnet connection to Cisco Router.

How to Configure Telnet on Cisco Router in GNS3?

   Step 16

Type the username and password that you created when you applied the Cisco Telnet commands and press Enter. As you can see in the following image, you can now configure the Cisco Router via Telnet.

How to Configure Telnet on Cisco Router in GNS3?

   Step 17

You can check the sessions that are open on the Router by executing the show line command at the command prompt.

How to Configure Telnet on Cisco Router in GNS3?

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How to Configure Telnet on Cisco Router in GNS3? ⇒ Video

To configure Telnet on Cisco Router using GNS3, you can watch the following video and also subscribe to our YouTube channel to support us.

  Final Word

In this article, we have reviewed how to configure Telnet on Cisco Routers and Cisco Switches using GNS3 and VMware virtual machine. If you want to disable Telnet on Cisco Router, type transport input ssh in R1(config-line)#. The transport input ssh command only allows SSH connections and disables Telnet. Thanks for following us!

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Click the button below to download VMware Workstation 14 Pro virtualization software.

VMware Workstation Download

Click the button below to download the latest version of the GNS3 network simulator program.

GNS3 Download

Click the button below to download the Putty program.

Putty Download

Click the button below to download the Cisco IOS c3725 IOS image used in this article.

Cisco c3725 Download

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