1) Go to the following URL to request a evaluation license: https://extranet.extremenetworks.com/MySupport/Licensing/Pages/EvaluationRequest.aspx
Please note access to this location requires a Extreme Networks extranet account. If you do not have one, you can create one here.
The ExtremeManagement evaluation license is valid for 30 days.
2) Using your Extreme Networks extranet account, you can download the ExtremeManagement software suite at https://extranet.extremenetworks.com/downloads/Pages/NMS.aspx.