User`s guide

7-1
CHAPTER 7
DIAGNOSTICS AND TROUBLESHOOTING
The main topics covered in this chapter are:
• Power-up diagnostics
• Diagnostics while the ATX is operational
• Status and activity indicators (LEDs)
• Troubleshooting
7.1 DIAGNOSTICS OVERVIEW
The ATX incorporates several built-in diagnostic and testing
capabilities which are convenient to use and cause minimal or no
disruption to the operational network. These capabilities are
effective for isolating problems within the ATX. Built-in diagnostic
capabilities include:
• System-wide power-up diagnostics, which are run every time
the system is powered up or reset.
• Local and remote loopback tests, which can be performed on
each interface module.
• Temperature sensors on each module (described in the
individual module manuals).
• Externally visible status indicators on each module (LEDs).
• Status of power supplies.
All tests can be performed locally or remotely using an in-band or
out-of-band NMS.
7.2 POWER-UP DIAGNOSTICS
The ATX performs an extensive set of diagnostic self-tests
whenever any of the following events occurs: