Troubleshooting; Understanding Post Results - Cisco Catalyst 2970 Hardware Installation Manual

Understanding POST Results

OL-6422-01

Troubleshooting

The LEDs on the front panel provide troubleshooting information about the
switch. They show failures in the power-on self-test (POST), port-connectivity
problems, and overall switch performance. For a full description of the switch
LEDs, see the "LEDs" section on page
You can also get statistics from the browser interface, from the command-line
interface (CLI), or from a Simple Network Management Protocol (SNMP)
workstation. See the software configuration guide, the switch command reference
guide on Cisco.com, or the documentation that came with your SNMP application
for details.
This chapter describes these topics for troubleshooting problems:
• Understanding POST Results, page 3-1
Diagnosing Problems, page 3-2
•
As the switch powers on, it begins POST, a series of tests that runs automatically
to ensure that the switch functions properly. When the switch begins POST, the
System, RPS, Status, Duplex, and Speed LEDs turn green. The System LED
blinks green, and the other LEDs are solid green.
When the POST completes successfully, the System LED remains green. The RPS
LED remains green for some time and then reflects the RPS operating status. The
other LEDs turn off and then reflect the switch operating status.
C H A P T E R
1-6.
Catalyst 2970 Switch Hardware Installation Guide
3
3-1