How to use gns3
Gns3 is a famous network simulator used for simulation and practicing different network setup or scenario in real time. You simulate routers and switches on your pc without having the real one. The advantage of GNS3 as compare to other simulator is that it uses real Cisco IOS. With gns3 you can also simulate layer 3 switches, firewall (ASA) and juniper router as well. This article is about “ how to use gns3 step by step all configuration”
Cisco 3640 Ios Image Download For Gns3, Astronomical Image And Data Analysis (Astronomy And Astrophysics Library) F. Murtagh, A Group Of One's Own: Nurturing The Woman Writer (Story Line Press Writer's Guides) Susan Wereska, Your Rights 2000-2001: A Guide To Money Benefits For Older People Sally West. Post subject: 3640 ios. Posted: Fri Jun 12, 2009 2:03 pm. I was able to work with the 3640 ios router under gns3 without any problem. But I was trying a new lab and for some reason, the 3640 does not have any interface. I tried the Configure option and try to add the network cards. Save the IOS image file in the local storage beforehand; Cisco 3640 series IOS is relatively easy to obtain and use on GNS3. Related article See the following article on how to download an IOS image file from a real router.
How to work with gns3:
This article is for beginner which will help them for working with GNS3 from start. So start with the step by step process by following these steps you can easily use GNS3 even if you are using it first time.
- Download and install the GNs3: Go to gns3 official website and download the latest version of GNS3 from there. You need an account for downloading; you can sign-up for free here. Once you sign-in into your account download the gns3 and install it. Installation of Gns3 is simple and straightforward. You can watch the following video if you have any issue in installation and downloading.
2. how to use gns3 : Once the installation is completed, open the GNS3 and you will see the following GNS3 screen.
For using any network device like router or switch you need the IOS of that device, GNS3 does not provide IOS you need to download it from internet or get it yourself.
- Once you have an IOS of router or switch you need to add that IOS in GNS3, for this click on the edit/preferences.
Now from IOS router tab click on new and browse for cisco IOS.
One important thing while using adding IOS in gns3 is idle pc value. If you did not add any router in GNS3 then you will get the error message “No router has been configured you must provide your own router images in order to use gns3”. For more detail on adding GNS3 IOS you can play the following video.
Recommended IOS for GNS3 are 3640, 3660, 3725, 3745 and 7200 IOS images listen below, they have proven to be the most stable for GNS3.
- Once you have add the router IOS in GNS3, click on router sign and drag the router IOS on dashboard.
Now for making connection between router or switch click “add a link”on from left down corner and then click on device which you want to open with other device. When you click on device it will pop up all the available interfaces. Select the interface and connect it to other device.
- Now you need to power on the device, simple click on start all devices button or right click on every single device and then click on start.
6. For configuration of any device right click on router and then click on the console and it will open the configuration console of router. You can review the above image for more detail. Once console is opened you can configure your router and can run all the cisco commands here and create your gns3 labs as per your choice.
7. You can also change the router interface and can also add interfaces of your choice. For this when your router is power off/Stop right click on it on then click on configure. Then from slot tap you can select enternet and serial interfaces for your router. For example if you want you select or add more serial interface select it from WICs slot from bottom.
I hope this article will help you in getting start with GNS3, let me know if you still have any question regarding it.
Creating an IOS router template using the GNS3 VM server
This section describes the procedure for creating an IOS router template using the GNS3 VM server. Except for the use of the GNS3 VM server as a server, the procedure is almost the same as that for creating a template on the local server. In addition, an IOS image file of the actual router is required beforehand, as in the case of creating a template on the local server.
Please see the following article on setting up a GNS3 VM server.
Step1:Prepare the IOS image file
Save the IOS image file in the local storage beforehand; Cisco 3640 series IOS is relatively easy to obtain and use on GNS3.
See the following article on how to download an IOS image file from a real router.
Step2:Open [Preferences]
Start GNS3 and click [Edit] – [Preferences] to open the [Preferences] window.
Step3:IOSルータテンプレートの作成画面を開く
Open the Create IOS Router Template screen.
Select “Run this IOS router on the GNS3 VM” as “Server” and click “Next” to continue.
Step4:Create an IOS router template
From the Create IOS Router Template screen, specify the necessary information to create an IOS router template.
Path of the IOS image file
Check [New Image] and select the IOS image file to be used for the template from [Browse]. The selected image file will be uploaded to the GNS3 VM. Click [Next] to continue.
Note that when the IOS file is downloaded from the actual router, it is a “.bin” file. When you specify the “.bin” file, the following dialog box will appear. Click “Yes” to extract the file into an “.image” file.
Template name
The default name of the router template is the platform name, such as “c3640”. Specify the name of the template if necessary; it is useful to know the feature set and version of IOS.
RAM size
Determine the amount of RAM for the IOS router you want to emulate; there is a link to Feature Navigator to find out the amount of RAM required for the IOS you want to use.
Modules
3640 Ios Gns3 Features
Select the module to be installed in the slot of the router. You can also install a WIC if necessary.
Idle-pc
3640 Ios Gns3 Download
Specify the Idle-pc. Click [Idle-PC finder] to measure the appropriate Idle-pc value. When the [Idle-PC finder] has measured the appropriate value, click [Finish] to complete the creation of the IOS router template.
Step5:Verify the IOS router template
Verify the contents of the IOS router template you have created.