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5-1
CHAPTER 5
ELS100-16TX DIAGNOSTICS AND TROUBLESHOOTING
The ELS100-16TX incorporates built-in diagnostic and testing
capabilities which are convenient to use and cause minimal or no
disruption to the rest of the operational network. These capabilities
are effective for isolating problems within the ELS100-16TX unit.
Built-in diagnostic capabilities include:
• System-wide power-up diagnostics, which are run every time
the system is powered up or reset.
5.1 POWER-UP DIAGNOSTICS
The ELS100-16TX performs an extensive set of diagnostic self-tests
whenever any of the following events occur:
• Power-up
• Reset using the front panel Reset button (a hard reset)
• Reset via the NMS (a soft reset)
• Automatic reset in response to a non-recoverable failure
The power-up diagnostics test processors, memory, and other
critical hardware components of the ELS100-16TX. All diagnostic
software is stored in non-volatile memory.
5.1.1 Power-up LED Sequence
When you power-up the ELS100-16TX, the following occurs:
1. The Power (Pwr) LED is on.
2. The CPU LED starts flashing. Two of the Port Status Mode
LEDs are on.
3. After several seconds, the CPU LED will stay on and only one
Port Status LED is lit. This indicates the power-up diagnostics
sequence is complete.