Table of Contents
Understanding POST Results
Understanding POST Results
Note
Catalyst 3500 Series XL Hardware Installation Guide
3-2
Table 3-1
lists the eight POST tests and their associated LEDs.
POST tests run automatically each time the switch is powered on. When the
switch begins POST, the port LEDs turn amber for 2 seconds, and then they turn
green. The System LED flashes green, and the RPS LED turns off. As each test
runs, the port LEDs, starting with number 1, turn off. The port LEDs for ports 2
to 8 each turn off in turn as the system completes a test.
When POST completes successfully, the port LEDs return to the status mode
display, indicating that the switch is operational. If a test fails, the port LED
associated with the test turns amber, and the system LED turns amber.
POST failures are usually fatal. Call Cisco Systems if your switch
does not pass POST.
Table 3-1
POST Test Descriptions
Switch LED
Component Tested
LED 1
DRAM
LED 2
Flash memory
LED 3
Switch CPU
LED 4
System board
LED 5
CPU interface ASIC
LED 6
Switch core ASIC
LED 7
Ethernet controller ASIC
LED 8
Ethernet interfaces
Chapter 3
Troubleshooting
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Troubleshooting
