Monitoring the CPU module

The CPU module has two LEDs. The LEDs indicate whether the CPU module and the Fibre Channel port are functioning normally.

The following illustration shows the location of the LEDs at the rear of the CPU module.

Use the following table to interpret the CPU module LEDs.

FC Status LED (green)	Fault LED (amber)	State	Action
On	Off	Normal	None.
Off	Off	Loop fault	Fibre Channel loop is open and needs to be fixed.
On	On	CPU module fault	Perform the following steps until the problem is resolved. Run diagnostics to isolate the failure and decide if CPU module replacement is necessary. See the Diagnostics Guide for more information. Replace the CPU module. See Replacing the CPU module. Contact Network Appliance Customer Service.
Off	On	Loop fault and module fault