> For the complete documentation index, see [llms.txt](https://johnoraw.gitbook.io/lnp/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://johnoraw.gitbook.io/lnp/2.gns3/testing-1.md).
# Testing 1
You have GNS3 working, its time to test some simple configuration.
Open GNS3 and click on **File->New Blank Project** and create a test project. Call it **SimpleSwitch** and save it, we will need it again in a future session.
Select **Switches** (the two horizontal arrows), then drag an ethernet switch to the worksheet.
Click on **End Devices** and then drag two VPCS to the worksheet. These are very basic PC emulators which can be used for simple testing.
Click on **Links**, it will show a red X symbol. Then click on a VPC and select Ethernet0. Connect it to the switch, use any ports.
It is useful to show interface labels for complex configurations (fourth button from the left) in the ribbon.
Right click on each PC and click Start. The interface will come up and you should see green lights!
Right click each PC and open the Console. We need this to configure the basic IP address. I typed **ip 192.168.1.1** and GNS3 checked for a duplicate IP address, assumed class c subnet mask, and configured the PC.
I did the same for PC-2 giving it an IP address of 192.168.1.2.
I then did a ping between the two devices to verify connectivity. Working network!
At the console of each PC, type **save**, you must manually save any device.
Right-click on each device and change symbols to whatever looks good to you.
Go to **View->Snap to Grid** to clean up your diagram. You can also show the grid to get a better idea of how you can lay out your devices.
