If you configure the shutdown feature and a hardware error is detected, the system displays an explanatory message on the startup screen.
All switch ports have been shut down. Use the "clear sys-recovery-level" command to restore all ports. ! SummitX.1 #
When an exclamation point (!) appears in front of the command line prompt, it indicates that the entire stand-alone switch is shut down as a result of your hardware recovery configuration and a switch error.