Fast Network 100 User GuidePage 5-1CHAPTER 5FN100 DIAGNOSTICS AND TROUBLESHOOTINGThe FN100 incorporates several built-in diagnostic and testingcapabilities which are convenient to use and cause minimal or nodisruption to the operational network. These capabilities are effective forisolating problems within the FN100 unit. Built-in diagnostic capabilitiesinclude system-wide power-up diagnostics, which are run every time thesystem is powered up or reset.All tests can be performed locally or remotely using an in-band orout-of-band Network Management System (NMS).5.1 POWER-UP DIAGNOSTICSThe FN100 performs an extensive set of diagnostic self-tests wheneverany of the following events occur:• Power-up• Reset using the front panel Reset button• Reset via the NMS (a soft reset)• Automatic reset in response to a non-recoverable failureThe power-up diagnostics tests processors, memory, and other criticalhardware components of the FN100. All diagnostic software is stored innon-volatile memory (EPROM and FLASH).5.1.1 Power-Up LED SequenceWhen you power-up the FN100, the following occurs:1. All LEDs, except for the Port Link LEDs, turn on for one second.2. The Power (Pwr) LED remains on.3. The Ready LED starts flashing.4. After several seconds, the Port Link and ACT LEDs flashed briefly.
