Cisco Systems OL-7469-04 User Manual
APPENDIX
B
Troubleshooting
During power up, your Cisco Catalyst 6500 Series switch or Cisco 7600 Series Internet Router goes
through a system check. This system check also includes all the modules (for example, the MWAM) that
are installed.
If your MWAM is not powering up properly, begin troubleshooting using the procedures in this
appendix. This appendix guides you through some initial checks and procedures that can solve some
basic MWAM problems. It can also direct you to the appropriate document for detailed troubleshooting
information and procedures to solve more complex problems.
This appendix contains general problem solving information about your Catalyst 6500 switch or Cisco
7600 router and specific problem solving information about your MWAM module in the following
sections:
• General Problem Solving, page B-2
• MWAM Problem Solving, page B-4
• MWAM System Error Messages, page B-6
Tip If you cannot locate the source of the problem, cont act a cust omer servic e representati v e for information
on how to proceed. For technical support information, see the Cisco Information Packet publication t hat
shipped with your product. Before you call, have the following information ready:
• Chassis type and serial number
• Maintenance agreement or warranty information
• Type of software and version number
• Date you received the new chassis
• Brief description of the problem
• Brief explanation of the steps you have taken to isolate the problem
For specific troubleshooting details about the Catalyst 6500 switch or Cisco 7600 router, refer to the
Troubleshooting chapters in the following books:
• Catalyst 6500 Series Switch Installation Guide—Appendix E
• Cisco 7600 Series Router Installation Guide—Chapter 4
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General Problem Solving
General Problem Solving
As you start your problem solving, you first look at the way your Catalyst 6500 switch or Cisco 7600
router is responding during power up. The key to problem solving is to isolate the problem to a specific
subsystem by comparing what your switch or router is doing to what it should be doing.
The LEDs on the front panel of the switch or router enable you to determine the switch or router
performance and operation. For a description of these LEDs, refer to the following books:
• Catalyst 6500 Series Switch Installation Guide—Appendix E
• Cisco 7600 Series Router Installation Guide—Chapter 4
When problem solving, consider the following:
• Power and cooling systems—Power LEDs, external power source, power cable, power supply and
circuit breaker, and blower and fan. Also consider inadequate ventilation or air circulation.
• Modules—LEDs on the modules help identify a failure (see the “Front-Panel Features” section on
page 1-3 for details about the MWAM STATUS LED).
• Cables—External cables that connect the router to the network.
Appendix B Troubleshooting
Troubleshooting the Power and Cooling Systems
In your Catalyst 6500 switch or Cisco 7600 router, both the power LED and the fans can help you
troubleshoot a power problem. The following items will help you isolate the problem (refer to the
“Troubleshooting the Power Supply” section in Appendix E, “Troubleshooting” of the Catalyst 6500
Series Switch Installation Guide or the “Troubleshooting the Power Supply” section in Chapter 4,
“Troubleshooting” of the Cisco 7600 Series Router Installation Guide for details):
Check the following items to help isolate problems with the power supply installation:
• With the Catalyst 6500 sw itch or Cisco 7600 router connect ed to the power source, is t he power LED
on the front panel on?
–
If not, check the DC input, DC source, and the power supply wiring.
–
Check the power supply connection to the motherboard.
–
If the power LED is still off, the problem might be a power supply failure.
• Does the Catalyst 6500 switch or Cisco 7600 router shut down after being on a short time?
–
Check the fans. If the fans are not working, the switch or router will overheat and shut itself
down.
–
If the fans are not working, check the power supply connections to the fans.
–
Ensure that the chassis intake and exhaust vents are clear.
Check the environmental site requirements in the:
–
Catalyst 6500 Series Switch Installation Guide—Chapter 2
–
Cisco 7600 Series Router Installation Guide—Chapter 2
B-2
• Does the switch or router partially boot, but the LEDs do not go on?
–
Check for a power supply failure by inspecting the power LED on the front panel of the switch
or router. If the power LED is on, the power supply is functional.
–
If the power LED is not on, refer to the Cisco Information Packet for warranty information or
contact customer service.
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Appendix B Troubleshooting
Environmental Monitoring
The Catalyst 6500 switch and the Cisco 7600 router both provide environmental monitoring of their
chassis components for over temperature conditions. This environmental monitoring provides an early
warning indication of possible componen t failure to en sure safe a nd reliable system operation and to
avoid network interruptions.
Some causes of abnormally high switch or router temperatures are:
• Fan fai l u re
• Air conditioner failure in the room
• Air blockage to cooling vents
Take steps to correct the problem. For information about environmental operating conditions, refer to
the following books:
• Catalyst 6500 Series Switch Installation Guide—Chapter 2
• Cisco 7600 Series Router Installation Guide—Chapter 2
General Problem Solving
Troubleshooting Modules
T ypical module problems can b e caused by the module itself, cables, or cable connections. As a rule, just
verifying the status LEDs of a particular module will help you to determine any faults.
Check for the following general symptoms to help isolate a problem:
• Module is not recognized by the switch or router.
–
Make sure the module is firmly seated in its slot.
–
Check the LEDs on the module. Each module has its own set of LEDs.
–
Make sure you have a version of Cisco IOS software that supports the module.
• Module is recognized, but interface ports do not initialize.
–
Make sure the module is firmly seated in its slot.
–
Check external cable connections.
–
Make sure you have a version of Cisco IOS software that supports the module.
• Switch or router does not boot properly, or constantly or intermittently reboots.
–
Make sure the module is firmly seated in its slot.
–
Check the switch or router chassis or software. Refer to the Cisco Information Packet
publication that shipped with your switch or router for warranty information, or contact
customer service.
• Switch or router powers on and boots only when a particular module is removed.
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Check the module. Refer to the Cisco Information Packet publication that accompanied your
order for warranty information, or contact customer service.
• Switch or router powers on and boots only when a particular cable is disconnected.
–
There may be a problem with the module or cable. Refer to the Cisco Information Packet
publication for warranty information, or contact customer service.
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