I have few HP 2920. They are connected to another HP modular switch via uplinks. When I check which devices are connected via MAC I can only see MAC addresses on uplink ports (idk why I can't see particular MAC on particular port on 2920. They are showed also in uplink ports).
What I want to do, is to prevent another users which are not allowed to, to plug into those 2920 switches. How can I block and allow only recognized (for example those, which are connected in this moment) devices connect with Network? I have not big experience with HP Switches so..
My Network looks like this: http://i.imgur.com/TeH6aqp.jpg
and what I want to achieve: (red PC won't have connection) http://i.imgur.com/xvznxhn.jpg