Instruction Manual

System Alert LED is illuminated
The System Fault LED is illuminated when a fault exists in the mpx100/100b firmware or hardware.
If the System Fault LED is illuminated, check the Heartbeat LED for an error blink pattern and take
necessary actions. See “Heartbeat LED blink patterns” on page 174 for more information.
Power-on self-test diagnostics
The mpx100/100b performs a series of tests as part of its power-on procedure. The POST diagnostic
program performs the following tests:
• Memory
• FLASH validation
• PCI device discovery
• Management Ethernet port
Heartbeat LED blink patterns
The Heartbeat LED indicates the operational status of the mpx100/100b. When the POST completes
with no errors, the Heartbeat LED blinks at a steady rate of once per second. When the mpx100/100b
is in maintenance mode, the Heartbeat LED illuminates continuously. The blink patterns that indicate
critical errors are described in the following sections. In addition to producing a Heartbeat error blink
pattern, a critical error also illuminates the System Fault LED.
The Heartbeat LED shows an error blink pattern for the following conditions:
• 1 blink—Normal operation
• 2 blinks—Not used
• 3 blinks—System error
• 4 blinks—Management port IP address conflict
• 5 blinks—Over temperature
Normal heartbeat blink pattern
A blink pattern of one second ON followed by one second OFF indicates that the mpx100/100b is
operating normally (see Figure 73).
Figure 73 Normal heartbeat blink pattern
.
System error blink pattern
A system error is indicated with a three-blink pattern (see Figure 74).
Figure 74 System error blink pattern
.
Diagnostics and troubleshooting174