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Chapter 5
Troubleshooting Initial Startup Problems
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
the problem:
Table 5-3
Symptom
LEDs remain off when the
system power switch is turned
on.
Power supply and fans appear
operational, but none of the I/O
LEDs are on.
The prior configuration—native
Gigabit Ethernet—LEDs remain
on after configuring the ports to
change the configuration from
one media type to the other.
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.
OL-11364-04
"Identifying Startup Problems" section on page
Troubleshooting the I/O Subsystem
5-3), check the following items to help isolate
Possible Cause
Possible Solution
Power supply or
If the LEDs stay off, first see the
cooling
"Troubleshooting the Power Subsystem"
subsystem is
section on page 5-4
faulty.
the Cooling Subsystem" section on page 5-6
ensure that both the fans and the power supply
are functioning properly.
The improperly
Reseat the port adapter, make sure the port
connected port
adapter lever is in the locked position, and then
adapter has
restart the system.
indefinitely
paused the
system.
The media-type
See
Chapter 3, "Starting and Configuring the
command was
Router,"
not used when
Ethernet Interfaces" section on page
changing the
configuration of
these ports.
Cisco 7201 Installation and Configuration Guide
Problem Solving Using a Subsystems Approach
and the
"Troubleshooting
the
"Configuring the Native Gigabit
to
3-15.
5-7
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Table of Contents
Troubleshooting
