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Chapter 5 Troubleshooting Initial Startup Problems
Problem Solving Using a Subsystems Approach
Troubleshooting the I/O Subsystem
The procedures in this section assume that you have not made changes to your configuration file.
If the Cisco 7201 router I/O LEDs (LINK/ACTV, EN, USB, FE 0/0, CF ACTV) do not go on as expected (see the “Identifying Startup Problems” section on page
Table | Troubleshooting the I/O Subsystem |
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Symptom |
| Possible Cause | Possible Solution |
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LEDs remain off when the | Power supply or | If the LEDs stay off, first see the | |
system power switch is turned | cooling | “Troubleshooting the Power Subsystem” | |
on. |
| subsystem is | section on page |
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| faulty. | the Cooling Subsystem” section on page |
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| ensure that both the fans and the power supply |
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| are functioning properly. |
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Power supply and fans appear | The improperly | Reseat the port adapter, make sure the port | |
operational, but none of the I/O | connected port | adapter lever is in the locked position, and then | |
LEDs are on. |
| adapter has | restart the system. |
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| indefinitely |
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| paused the |
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| system. |
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The prior | The | See Chapter 3, “Starting and Configuring the | |
Gigabit | command was | Router,” the “Configuring the Native Gigabit | |
on after configuring the ports to | not used when | Ethernet Interfaces” section on page | |
change the configuration from | changing the |
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one media type to the other. | configuration of |
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| these ports. |
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Troubleshooting the Processor Subsystem
The processor subsystem comprises the system board and the port adapter. A port adapter that is partially connected to the system board sends incomplete signals to the processor, which faults the PCI bus and causes the system to pause indefinitely. Therefore, first ensure that the system software has initialized successfully and then check to see if the port adapter is fully connected.
Cisco 7201 Installation and Configuration Guide
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