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The front-panel LEDs provide troubleshooting information about the switch. They show power-on self-test (POST) failures, port-connectivity problems, and overall switch performance. For a full description of the LEDs, see the "LEDs" section.
You can also get statistics from the Cluster Management Suite (CMS), the command-line interface (CLI), the Cisco Intelligence Engine 2100 (IE2100) Series Configuration Registrar, or a Simple Network Management Protocol (SNMP) workstation. Refer to the switch software configuration guide, the switch command reference, or the documentation that came with your IE2100 or SNMP application for details.
This chapter provides these topics for troubleshooting problems:
When the switch powers on, it automatically begins POST, a series of tests that verifies that the switch functions properly. When the switch begins POST, the system LED is off. If POST completes successfully, the LED turns green. If POST fails, the LED turns amber.
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Note The uplink port status LEDs provide system and status information during POST.
On the Catalyst 2955T-12, the uplink ports are labeled 1 and 2. On the
Catalyst 2955C-12 and Catalyst 2955S-12, the uplink ports are labeled 13 and 14. POST failures are usually fatal. Call Cisco Systems if your switch does not pass POST. |
Common switch problems fall into these categories:
Table 4-1 describes how to detect and solve these problems.
Table 4-1 Common Problems and Solutions
| Symptom | Possible Cause | Resolution |
|---|---|---|
Refer to the switch software configuration guide for information about identifying autonegotiation mismatches. |
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System LED (Uplink port status 13 LED) is amber, and all port LEDs are off. |
Attach a monitor to the serial port to display the switch boot loader. For more information, refer to the switch software configuration guide. |
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Posted: Fri Apr 25 20:23:41 PDT 2003
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