System information

Troubleshooting Hardware and Booting Problems 3-35
Catalyst 1600 Token Ring Switch Startup
Catalyst 1600 Token Ring Switch Startup
When you start up a Catalyst 1600 Token Ring switch, the self-test program automatically checks to
see whether the switch is operating correctly. The self-test begins by testing low-level hardware
functions and then conducts high-level self-tests. During the high-level self-test, the LCD panel
displays the following:
• The version number of the boot software, and the date and time that the software was released
• The number of each stage in the self-test (these are usually displayed too quickly for the numbers
to be visible)
• A “System Self Test PASSED” message indicating that the self-test is complete and the Catalyst
1600 has passed the test
Table 3-9 outlines possible Catalyst 1600 Token Ring switch startup problems and describes
symptoms to those problems.
Table 3-9 Hardware: Catalyst 1600 Token Ring Switch Startup Problems and
Symptoms
LightStream 2020 Startup
When you start up a LightStream 2020 ATM switch, the blowers start running and the test and
control system (TCS) applies power to the cards and initiates a series of diagnostics known as the
power-on self-test (POST). POST diagnostics run automatically on each card whenever the system
or the slot is powered up or when the card is reset. If a card passes POST, the green RDY LED turns
on. If a card fails POST, its yellow FLT LED turns on.
Series processor and interface subsystem Step 1 Check the supervisor engine module Status and Link LEDs.
These should both be green if all diagnostic and self-tests
were successful and ports are operational. For more
information about interpreting the supervisor engine
module LEDs, refer to the user guide for your switch.
Step 2 Check the LEDs on individual interface modules. In most
cases these should be green (or should flicker green, in the
case of transmit and receive LEDs) if the interface is
functioning correctly. For detailed information on
interpreting interface module LEDs, refer to the user guide
for your switch.
Step 3 Check all cabling and connections. Replace any faulty
cabling.
Possible Problem Symptom
Low-level test failure The startup process is halted.
High-level test failure The self-test program restarts and the number of the failed test is
displayed. High-level tests are repeated until the self-test is
completed successfully.
Hardware error Contact your technical support representative. Be sure to note the
number of the failed test and the version number of the software
containing the self-test program.
Possible Problem Area Solution