Cisco Router Telnet Configuration – Making a telnet connection to a Cisco Router or Cisco Switch is a simple process. Let’s create a network topology with VMware Workstation and GNS3, and perform a Telnet connection with the Putty program on the operating system.
Cisco Router Telnet Configuration
The Cisco Router Telnet Configuration operation can be done through Console connection for the first time configuration of the Cisco router. Instead of going to the side of the Cisco router, the rest of the settings can be made over the network.
After the Cisco router console connection is established, the IP address is first given to the interface that will be used by the Cisco router. After Cisco Router basic configuration, making the telnet connection is the most logical way.
You need to create a new virtual machine in the VMware Workstation virtualization program for the Cisco Router telnet configuration over the network. Afterward, you need to install Windows operating system.
We use the VMware Workstation to make more specific experiments. In addition, we use the GNS3 program which is called the network simulator program.
Before this processes, we recommend to you read the topic called the “Cisco Router Basic Configuration“
How to Configure Telnet on Cisco Router?
For the Cisco router telnet configuration network design, we first add the Cisco router in the GNS3 program. We will then include the Windows 8.1 operating system in the VMware Workstation program into this network topology. As a result, we will implement the Cisco router telnet configuration.
If you have information about GNS3 program, read certainly the topic called the “Adding Cisco IOS to GNS3“
Cisco Telnet Connection Related Softwares
VMware Workstation 12.5.2 Download
GNS3 1.5.3 Download
Cisco IOS c3725 Download
GNS3 Telnet Connection Network Topology
In the GNS3 network simulator program, follow the steps below for telnet connection network topology.
After starting the GNS3 program, click on the Routers section to add a Cisco router to the workspace.
Routers attached to the GNS3 program appear. Drag and drop the Cisco router c3725 into the workspace.
To add a Switch to the workspace for the GNS3 telnet connection network topology, click on the field like in the image below.
Drag and drop the Ethernet Switch into the workspace.
We need a host computer to include to the topology the Windows 8.1 virtual machine. Drag and drop it onto the GNS3 workspace while holding down on the host.
For wiring, click on the part of the cable you see in the picture below. If you see the crossed (X) sign, it means that the cabling option is active. To connect the devices, the FastEthernet interfaces will appear after you left-click on the Cisco router. And then connect to the FastEthernet0/0 interface.
The point to note here is that after you click the configure right button on the Host, you need to select one of the VMnets from the connection units. This article is structured as VMnet3 in the VMware Virtual Network Editor program.
After the cabling finished, green icons will appear as shown in the image below. The green icon indicates the correctness of the link. After running Cisco router, the router’s icon will light green.
VMware Workstation Adaptor Settings for GNS3
VMnet3 Adaptor Setting of Physical Computer
You can change the IP address from the VMnet3 settings when you enter the network and management center settings on the physical computer. Normally, the IP address here is 192.168.8.1. However, when designing, routers are usually assigned an .1 IP address. So it is useful to change the IP address on VMnet in order not to causes complexity.
The Virtual Network Editor of the VMware Workstation virtualization program is set to VMnet3 Host-Only. You can change the values here. As a result, the logic is the same.
In the VMware Workstation program, change the network card setting of the Windows 8.1 operating system to VMnet3 in the Custom option.
We recommend reading “VM Workstation Virtual Network Editor Configuration” for detailed information about VMware Workstation network adapter settings!
After checking the necessary steps, we can now run the Cisco router. Click the Start button as shown below.
We continue to process the Cisco Router telnet configuration. After double-clicking on the Cisco Router, the console window will open. Apply the following commands in order;
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)# line vty 0 4
R1(config-line)# login local
R1(config)# username cisco privilege 15 password cisco123
After you passed on to the VMware virtual machine, copy the Putty program to your desktop. And then run the Putty program. After the Putty program is turned on, select the telnet option.
For the telnet connection with Putty, it need to connect to the FastEthernet0/0 interface of the Cisco router. For this reason, Ip address is 192.168.8.1 as in the following image. The telnet standard port number is 23 because we not made any changes to the port setting.
Click the Open button…
The putty program has successfully established a telnet connection. The Cisco Router asks for the username and password we created for the telnet connection.
After typing your username and password, press Enter. And the connection will be established successfully.
With the Show line command, we can see which sessions are open on the Cisco Router. VTY indicates that the Cisco Router telnet configuration is active.
Cisco Router Telnet Configuration ⇒ Video
I am pointing to the
GNS3 Configuration for Beginners
here. We have created a small network topology with GNS3 and the VMware Workstation and then performed the Cisco Router telnet configuration. I hope it was a useful article for you.