End-of-Sale and End-of-Life Announcement for the Cisco IOS Software Release 12.2(50)SE for Cisco Catalyst 3750, 3560, 2960, and ME 3400 Series Switches Relocation content for EOL7415 03-Apr-2012. How to configure IOS on GNS3:Inter-VLAN routing is used to route packets between. How to add Cisco IOS-based devices in GNS3. Published: Sat 19 August 2017 in Cookbook. Lab networking cisco. But they are very versatile as they can act not only as a router but also as a layer-2 or layer-3 switch in your GNS-3 topology. IOU stands for IOS on Unix.
This tutorial explains how install and import Cisco IOS in GNS3 step by step with practical examples. In order to use any Cisco device such as router and switch in GNS3, we must have to install that device’s IOS first. Learn how to install, configure and use Cisco IOS in GNS3 in detail.
Since Cisco IOSs are protected by copyright laws, GNS3 does not include any Cisco IOS in default installation. It only provides a platform to use Cisco IOS but it does not provide any Cisco IOS itself. It means, in order to use any Cisco device in GNS3, we must have to install that device’s IOS first. This tutorial explains how to install necessary Cisco device’s IOS in GNS3.
Downloading Cisco IOS
In order to install Cisco device in GNS3, we must have to obtain its IOS file. There are several sources from where we can obtain this file. We can get it from real Cisco device, or can download it from Cisco’s official site (it requires a valid Cisco account and license agreement) or can download it from educational sites. If none of these work for you, simply search following term in Google.
Cisco 3750 Ios Image For Gns3 Academy Download
You may check this site http://tfr.org/cisco/. It contains the largest collection of Cisco IOSs. I found this site through Google search. It may be may not be working at this moment.
Regardless how you obtained the IOS file, installation process is same for all.
Installing and importing Cisco IOS in GNS3
For this tutorial I assume that GNS3 is installed and configured.
To learn how to install and configure GNS3, check this tutorial
It explains how to install and configure GNS3 step by step with practical example.
Download the IOS file
Open GNS3 and click Edit file menu and from sub-menu click Preferences
Navigate to Dynamips -> IOS routers option in left pane and click New button in right pane
Select New Image option and click Browse button. Now select the downloaded IOS image file
By default IOS files are compressed. GNS3 supports both compressed and decompressed format.
Keep the compressed format
Verify that correct file is selected and click Next button
If selected IOS belongs to an outdated device, wizard may display a warning message.
In real life, using an outdated device is not recommended. Since GNS3 uses a real Cisco IOS, it also follows the same recommendation and warns us about the outdated IOS. If we are going to use this device only for CCNA exam preparation or to get some hands on experience on Cisco IOS, we can ignore this message.
Now wizard extracts the hardware information (platform and chassis number) form selected IOS file and lists it in next screen along with an automatically populated device name.
If extracted information does not match with device, select the correct platform and chassis number from drop down. If require, you may also adjust the device name.
Downloading Cisco IOS
In order to install Cisco device in GNS3, we must have to obtain its IOS file. There are several sources from where we can obtain this file. We can get it from real Cisco device, or can download it from Cisco’s official site (it requires a valid Cisco account and license agreement) or can download it from educational sites. If none of these work for you, simply search following term in Google.
Cisco 3750 Ios Image For Gns3 Academy Download
You may check this site http://tfr.org/cisco/. It contains the largest collection of Cisco IOSs. I found this site through Google search. It may be may not be working at this moment.
Regardless how you obtained the IOS file, installation process is same for all.
Installing and importing Cisco IOS in GNS3
For this tutorial I assume that GNS3 is installed and configured.
To learn how to install and configure GNS3, check this tutorial
It explains how to install and configure GNS3 step by step with practical example.
Download the IOS file
Open GNS3 and click Edit file menu and from sub-menu click Preferences
Navigate to Dynamips -> IOS routers option in left pane and click New button in right pane
Select New Image option and click Browse button. Now select the downloaded IOS image file
By default IOS files are compressed. GNS3 supports both compressed and decompressed format.
Keep the compressed format
Verify that correct file is selected and click Next button
If selected IOS belongs to an outdated device, wizard may display a warning message.
In real life, using an outdated device is not recommended. Since GNS3 uses a real Cisco IOS, it also follows the same recommendation and warns us about the outdated IOS. If we are going to use this device only for CCNA exam preparation or to get some hands on experience on Cisco IOS, we can ignore this message.
Now wizard extracts the hardware information (platform and chassis number) form selected IOS file and lists it in next screen along with an automatically populated device name.
If extracted information does not match with device, select the correct platform and chassis number from drop down. If require, you may also adjust the device name.
Verify / adjust the information and Click Next button to continue
Next screen allows us set the RAM size for this device. By default wizard automatically allocates the minimum recommended memory (RAM) for device. But if require, we can adjust it to match with our specific requirement.
If selected IOS belongs to a modular device, next screen allows us to install the interfaces in available slots.
Select appropriate interfaces and click Next button. Microsoft office 2007 phone activation crack mso.dll.
Just like interfaces slots, if selected IOS belongs to a device which has WIC modules, next screen allows to install the WIC interface in WIC slots.
Select the desire WIC interface and click Next button
Next screen allows us to put a limit on CPU usage by this IOS. We should always specify this value. This value prevents a faulty or buggy IOS from consuming entire CPU cycles. Once this value is configured, GNS3 does not allow IOS from consuming CPU beyond this limit.
Click Idle-PC finder button and use the suggested value in this field.
Click Finish button to close the wizard
Managing IOS files
All installed IOS files can be managed from the same option.
All installed files are listed in the right pane of Dynamips -> IOS routers option. Select the file which you want to manage. Once IOS file is selected, control options will be highlighted in the bottom section. There are four control options
New: -
this option is used to install the new IOS file. If no installed IOS file is selected, only this option will be highlighted.
Decompress: -
This option allows us to decompress the selected IOS file.
Edit: -
This option allows us to update the configuration values which we used while installing it. All configuration values are listed in right section of the pane.
Delete: -
This option allows us to delete the selected IOS file.
How to use installed device from IOS
Once IOS file is successfully installed in GNS3, belonging device will be available in Installed appliances box. For example, in this tutorial we installed an IOS file which belongs to 2600 series router. To use it, click Routers icon from left pane and select Installed appliances from drop down box. It will list all installed devices. To use the device, drag it in workspace.
That’s all for this tutorial. For any feedback, suggestion or comment about this tutorial, simply mail me. If you like this tutorial, share it with your friends.
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