A brief introduction to GNS3

1. Open GNS3 and come to the welcome interface. Every time you open it, it will appear by default. Check the lower left corner if you don't want to appear, and then close it.

two。 There will be an interface to create a new project, where you can change the name and specify the file address, which is equivalent to saving a file first and then operating it, or you can fork it out and save it later when you need to save it.

3. Sometimes another pop-up window will ask you if you need to update. Here is a suggestion to No.

4. Introduction interface

5. Next, create a router and click edit-preference

6. Click IOS routers, then new, select the image file in the IOS image configuration; OK, and then the next step

7. Here is to adjust the name and module, here do not care about him, the default can, the meaning of the check box is that this is a layer 3 switch, do not select here, click next

8. 128MB of memory, enough to continue to click on the next step

9. These options represent the business veneer on the device, that is, the network cable port, which can be added later. No changes are made here, and you can click next by default.

10. Mode remains the same. Click next.

11. The Idle-PC here is very important. If it is not filled in, it will seriously occupy the CPU. Do not fill it here first, and then let the system calculate on its own to get an optimal value. Click finish here

twelve。 Then create it and click OK.