Rookie Enterasys user here. We have a stack of 4 C5G124-48P2's. A problem yesterday caused the stack to reboot. When it came back up, regular ethernet ports 45-48 stopped working 3 slaves, but the GBIC ports 45-48 are still working. We use a mix of GBIC and the ethernet ports on that end of the switches. As a temporary work around, I moved the ethernet stuff to lower numbered ports, but I'd like to get it put back.