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Troubleshooting
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
section on page
You can also get statistics from the browser interface, the command-line interface
(CLI), the Cisco Intelligence Engine 2100 (IE2100) Series Configuration
Registrar, or a Simple Network Management Protocol (SNMP) workstation. See
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:
•
•
78-14944-03
2-10.
Understanding POST Results, page 5-2
Diagnosing Problems, page 5-3
C H A P T E R
Catalyst 2955 Hardware Installation Guide
5
"LEDs"
5-1
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Summary of Contents for Cisco Catalyst 2955C-12
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Page 1: Troubleshooting
You can also get statistics from the browser interface, the command-line interface (CLI), the Cisco Intelligence Engine 2100 (IE2100) Series Configuration Registrar, or a Simple Network Management Protocol (SNMP) workstation. See the switch software configuration guide, the switch command reference, or the documentation that came with your IE2100 or SNMP application for details. -
Page 2: Understanding Post Results
The uplink port status LEDs provide system and status information during POST. Note On the Catalyst 2955C-12 and 2955S-12, the uplink ports are labeled 13 and 14. On the Catalyst 2955T-12, the uplink ports are labeled 1 and 2. If you connect or disconnect the console cable with power applied to the Warning switch or any device on the network, an electrical arc can occur. -
Page 3: Diagnosing Problems
Note On the Catalyst 2955T-12, the uplink ports are labeled 1 and 2. On the Catalyst 2955C-12 and 2955S-12, the uplink ports are labeled 13 and 14. POST failures are usually fatal. Call Cisco Systems immediately if your switch does not pass POST. See the page xxx. - Page 4 For 100 and 1000 speed connections: – Wrong cable type (not Cat 5) attached to device and switch If the switch is attached to a – repeater, the total distance between the two end stations exceeds the cabling guidelines. Bad adapter in attached device.
- Page 5 Wait 30 seconds for port status LED to turn green. Reset the terminal-emulation software to 9600 baud. Attach a monitor to the serial port to display the switch boot loader. For more information, see the switch software configuration guide. Contact Cisco Systems. •...
- Page 6 Chapter 5 Troubleshooting Diagnosing Problems Catalyst 2955 Hardware Installation Guide 78-14944-03...
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