Connecting GNS3 to loopback interface
To connect GNS3 to an existing loopback interface, add a router and a cloud device.
![](https://abetayev.me/wp-content/uploads/2024/05/gns3_2017-02-02_1.png)
By itself, the Cloud doesn’t do anything. We need to add an interface to it. To do that, right-click on the Cloud and choose “Configure”.
![](https://abetayev.me/wp-content/uploads/2024/05/gns3_2017-02-02_2.png)
In the Cloud’s Node properties choose the previously configured loopback interface from the drop-down options in the Ethernet tab and click Add.
![](https://abetayev.me/wp-content/uploads/2024/05/gns3_2017-02-02_3.png)
![](https://abetayev.me/wp-content/uploads/2024/05/gns3_2017-02-02_5.png)
“nio_gen_eth:MS Loopback” interface is added.
Now lets connect Cloud’s “nio_gen_eth:MS Loopback” interface to Router’s f0/0 and power it on.
![](https://abetayev.me/wp-content/uploads/2024/05/gns3_2017-02-02_6.png)
Now lets configure Router’s f0/0 interface and check connectivity to the loopback interface.
![](https://abetayev.me/wp-content/uploads/2024/05/console_2017-02-02_1.png)