Loopback adapters are handy when there’s no physical network connection. With loopback adapters we can test the network and use it in a variety of ways. For instance, to connect a network simulated inside the GNS3 to the host machine.
Follow these steps to install a new loopback adapter on your Windows machine.
Step #1 : Launch the hardware wizard by running hdwwiz in the Windows run prompt (Win+R).
Click Next on the Add Hardware Wizard and choose “install the hardware that I manually select from a list (Advanced)“. And click Next.
Step #2 : Select Network Adapters in the common hardware types list. And click Next.
Choose Microsoft in the Manufacturer list which will bring a list of network adapters in the column right to it. Select “Microsoft KM-TEST Loopback Adapter” and Click Next.
Step #3 : Install the Loopback adapter by clicking Next in the window.
After few seconds, you’ll get the hardware was successfully installed message in the Add Hardware Wizard. Click Finish.
Step #4 : Verify the Loopback Adapter.
Open the Network Connections from the Control Panel or Run ncpa.cpl in the Windows run prompt.
Along with other network adapters you’ll find the Loopback adapter we’ve just installed.
Step #5 : Restart the Windows machine.
I’ve added this step because I wasn’t able to associate the Loopback adapter to GNS3 Cloud object and was perplexed by the error “Server error from 127.0.0.1:8000: SW1: unable to create generic ethernet NIO“. After spending some time, I realized that I didn’t restarted my PC. Once I rebooted, everything worked flawlessly. So don’t forget to restart your system after installing the Loopback adapter.