We have a Dell x1018 P that stopped communicating with the switch next to it (connected via fiber on an SFP). Upon inspection, we noticed that while the switch was powered up, all the ports were dark. We had to reboot it twice for it to become operational again.
It has the latest firmware (126.96.36.199).
Any ideas as to what could cause this and a potential remedy? The uptime prior to rebooting was about 3 weeks.