I have a HP ProCurve 4000M network switch with a ProCurve 100/1000T (J4115B) module installed on the same box. I want connect this 100/1000T module to my another HP ProCurve 2824 Gigabit switch howerver it does not work. It looks like, J4115B runs on 100 speed only. I go to the management page of 4000M switch and under the port configuration page, I found that I can configure this module with the following options only 100HDx, 100FDx, or Auto mode only.
I also found that it J4115B in Auto mode, it cannot be connected with HP ProCurve 2824. However if I set it to 100FDx, it can communicate with HP ProCurve 2824 in 100 speed.
I want to build a giga-speed backbone, how can I make it work?