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 5-3), check the following items to help isolate the problem:

Table 5-3

Troubleshooting the I/O Subsystem

 

 

 

 

 

Symptom

 

Possible Cause

Possible Solution

 

 

 

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 5-4and the “Troubleshooting

 

 

faulty.

the Cooling Subsystem” section on page 5-6to

 

 

 

ensure that both the fans and the power supply

 

 

 

are functioning properly.

 

 

 

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.

 

 

indefinitely

 

 

 

paused the

 

 

 

system.

 

 

 

 

The prior configuration—native

The media-type

See Chapter 3, “Starting and Configuring the

Gigabit Ethernet—LEDs remain

command was

Router,” the “Configuring the Native Gigabit

on after configuring the ports to

not used when

Ethernet Interfaces” section on page 3-15.

change the configuration from

changing the

 

one media type to the other.

configuration of

 

 

 

these ports.

 

 

 

 

 

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

 

OL-11364-04

5-7

 

 

 

Page 119
Image 119
Cisco Systems CISCO7201 manual Troubleshooting the I/O Subsystem, Troubleshooting the Processor Subsystem