Specifications

5-3
Cisco 7100 Series VPN Router Installation and Configuration Guide
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Chapter 5 Troubleshooting the Installation
Troubleshooting Overview
Problem Solving Using a Subsystems Approach
The key to solving problems with the system is isolating the problem to a specific subsystem. The first
step in solving startup problems is to compare what the system is doing to what it should be doing.
Because a startup problem is usually caused by a single component, it is more efficient to first isolate
the problem to a subsystem rather than troubleshoot each component in the system. For these
troubleshooting procedures, consider the following subsystems:
• Power subsystem—Includes the power supply and the external power cable.
• Processor subsystem—Includes the network processing card, the modular port adapter, the service
module, and the fixed WAN ports. The system memory and management functions reside on the
network processing card, and the enabled LED on each port indicates if the port is initialized. A
modular port adapter that is partially installed in the router can cause the system to hang and crash.
• Cooling subsystem—Includes the fans.
The following sections help you isolate a problem to one of these subsystems and direct you to the
appropriate troubleshooting section.
Identifying Startup Problems
Startup problems are commonly due to the source power or to a port adapter that is dislodged from the
router. Although an over temperature condition is unlikely at initial startup, the environmental
monitoring functions are included in this chapter because they also monitor internal voltages.
When you start the router for the first time, observe the startup sequence described in the “Starting the
System and Observing Initial Conditions” section on page 4-1, which contains a more detailed
description of the normal startup sequence.
LEDs indicate all system states in the startup sequence. Check the state of the LEDs to determine when
and where the system failed in the startup sequence. Use the following descriptions to isolate the
problem to a subsystem, and then proceed to the appropriate sections to try to resolve the problem.
When you start up the system by turning the power supply switch to the on (|) position, the following
should occur:
• You should immediately hear the fans operating.
If not, proceed to the “Troubleshooting the Cooling Subsystem” section on page 5-6. If you
determine that the power supply is functioning normally and that a fan is faulty, contact a customer
service representative. If a fan does not function properly at initial startup, there are no installation
adjustments that you should make.
• The LEDs on the router should go on as follows:
– The power LED goes on immediately and indicates that the router is receiving power. This LED
goes on during a successful router boot and remains on during normal operation of the router.
If this LED remains off when you start the router, either there is a problem with the power
supply (it is damaged or not connected correctly), or the network processing card is not
connected properly. Proceed to the “Troubleshooting the Power Subsystem” section on
page 5-4.
– The system ready LED goes on after the power LED and indicates that the network processor
card is enabled for operation by the system; however, it does not mean that the Fast Ethernet
port is functional or enabled. This LED goes on during a successful router boot and remains on
during normal operation of the router.