What to check when GNS3 VM is not green in Servers Summary

Once the GNS3 VM server is set up, when you start GNS3, the GNS3 VM will also start automatically. If it is normal, the GNS3 VM should be green in Servers Summary.

If the Servers Summary of the GNS3 VM does not turn green, please check the following points.

  • Make sure that the versions of GNS3 and GNS3 VM match.
  • Check if the port number setting of the VM server in GNS3 and the port number listened by GNS3 VM are the same.

Make sure that the versions of GNS3 and GNS3 VM match.

It seems that the version of GNS3 and the version of GNS3 VM must match, and the version of GNS3 can be checked from [Help] – [About].

You can find the version of the GNS3 VM in [GNS3 server version].

Check if the port number setting of the VM server in GNS3 and the port number listened by GNS3 VM are the same.

If the port number setting of the VM server in GNS3 does not match the port number being listened to by the GNS3 VM, the Server Summary will remain greyed out.

When I set up the GNS3 VM server (v2.2.17), the port number of the VM server was the same as the port number of the local server (TCP 3080) if I followed the setup wizard. On the other hand, the GNS3 VM on VMware was listening on TCP 80, so it was still greyed out in the Servers Summary. If they do not match, please match them.

You can check the port number of the VM server in GNS3 from [edit] – [preference] – [GNS3 VM].

You can check the listening port number of the GNS3 VM in the [PORT] section.

How to use GNS3