Troubleshooting The I/O Subsystem; Troubleshooting The Processor Subsystem - Cisco 7301 Installation And Configuration Manual

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 7301 router I/O LEDs do not go on as expected (see the
section on page
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 hang. Therefore, first ensure that the system software has initialized successfully
and then check to see if the port adapter is fully connected.
OL-5418-07
5-3), check the following items to help isolate the problem:
Troubleshooting the I/O Subsystem
Possible Cause
Power supply or
cooling
subsystem is
faulty.
The improperly
connected port
adapter has
indefinitely
paused the
system.
The media-type
command was
not used when
changing the
configuration of
these ports.
Problem Solving Using a Subsystems Approach
"Identifying Startup Problems"
Possible Solution
If the LEDs stay off, first see the
"Troubleshooting the Power Subsystem"
section on page 5-4 and the
the Cooling Subsystem" section on page 5-5
ensure that both the fans and the power supply
are functioning properly.
Reseat the port adapter, tighten the screw of the
port adapter latch, and then restart the system.
See Chapter 3, "Starting and Configuring the
Router," the "Configuring the Native Gigabit
Ethernet Interfaces" section on page
Cisco 7301 Installation and Configuration Guide
"Troubleshooting
to
3-14.
5-7