We are trying to go from an HP Procurve gigabit switch to an Extreme Summit switch but are not getting connectivity. We used to go from a Unix box to the same fiber port on the Extreme Summit switch but have gotten a gbic module for the HP Procurve to try to connect those but it does not work. The gbic and the fiber cable are both good. Is there different gbics to go from switch to swith as opposed to going from switch to server? If so what do I need?