Cisco 2610 Hardware Installation Guide - Page 79

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Cisco 2600 Series Routers Hardware Installation Guide

OL-2171-06

Appendix A

Troubleshooting

Isolating Problems

Troubleshooting Modules, Cables, and Connections

Network problems can be caused by a module; cables or cable connections; or external devices such as

a modem, transceiver, hub, wall jack, WAN interface, or terminal. Check for the following symptoms to

help isolate the problem:

Tip

All the documents mentioned in this section are available both on the Documentation CD-ROM and

online.

•

Module is not recognized by the router.

–

Make sure that the module is firmly seated in its slot.

–

Check the LEDs on the module. Each module has its own set of LEDs. For information on these

LEDs, refer to the online publication

Cisco Network Modules Installation Guide

.

–

Make sure that you have a version of Cisco IOS software that supports the network module.

Check the


or accompanying configuration note for

the affected module’s software requirements.

•

Module is recognized, but interface ports do not initialize.

–

Make sure that the module and interface card are firmly seated in their slots.

–

Check external cable connections.

–

Make sure that you have a version of Cisco IOS software that supports the network module and

interface card. Check the


and the

Cisco Interface

Cards Installation Guide

or accompanying configuration notes for the affected network

module’s and interface card’s software requirements.

•

Router does not boot properly, or constantly or intermittently reboots.

–

Make sure that all modules are firmly seated in their slots.

–

Check the router chassis or software. Refer to the warranty information in the quick start guide

that shipped with your router, or contact customer service.

•

Router boots, but the console screen is frozen.

–

Check the external console connection.

–

Verify that the parameters for your terminal are set as follows:

(a) The same data rate as configured for the router (9600 bps is the default)

(b) 8 data bits

(c) No parity generated or checked

(d) 1 stop bit

•

Router powers on and boots only when a particular module is removed.

–

Check the module. Refer to the warranty information in the quick start guide that shipped with

your router, or contact customer service.

•

Router powers on and boots only when a particular cable is disconnected.

–

There may be a problem with the module or cable. Refer to the warranty information in the

quick start guide that shipped with your router, or contact customer service.

Section	Page
Cisco 2600 Series Routers Hardware Installation Guide	1
Contents	3
Preface	7
Objectives	7
Audience	8
Organization	8
Conventions	8
Safety Warnings	9
Related Documentation	14
Cisco 90-Day Limited Hardware Warranty Terms	16
Obtaining Documentation	17
Cisco.com	17
Ordering Documentation	17
Documentation Feedback	17
Obtaining Technical Assistance	18
Cisco Technical Support Website	18
Submitting a Service Request	18
Definitions of Service Request Severity	19
Obtaining Additional Publications and Information	19
Overview of Cisco2600 Series Routers	21
Hardware Features	21
Reading the Front-Panel LEDs	23
Reading the Rear-Panel LEDs	25
Modules, Interface Cards, and Memory	28
Interface Numbering	29
WAN and LAN Interface Numbering	29
Voice Interface Numbering	31
System Specifications	31
Regulatory Compliance	32
Preparing to Install the Router	33
Safety Recommendations	33
Safety with Electricity	33
Preventing Electrostatic Discharge Damage	34
General Site Requirements	35
Power Supply Considerations	35
Site Environment	35
Site Configuration	36
Equipment Racks	36
Installation Checklist	36
Creating a Site Log	37
Inspecting the Router	38
Tools and Equipment for Installation and Maintenance	38
Console and Auxiliary Port Considerations	39
Console Port Connections	39
Auxiliary Port Connections	40
Preparing to Connect to a Network	40
Ethernet Connections	41
Token Ring Connections	41
Serial Connections	42
Configuring Serial Connections	42
Serial DTE or DCE Devices	42
Signaling Standards Supported	43
Distance Limitations	43
Asynchronous/Synchronous Serial Module Baud Rates	44
ISDN BRI Connections	44
56-K/Switched-56-kbps DSU/CSU Connections	45
Installing the Router	47
Installing Modules, Interface Cards, and Power Supplies	48
Setting Up the Chassis	49
Setting the Chassis on a Desktop	49
Mounting the Chassis in a Rack	50
Attaching the Brackets to Cisco261x, Cisco262x, Cisco26xxXM, and Cisco265x Series Routers	51
Attaching the Brackets to a Router of 2-RU Height	55
Installing the Router in a Rack	56
Mounting the Chassis on the Wall	57
Attaching Rubber Feet to the Router	57
Attaching Wall-Mount Brackets to the Router	57
Mounting the Router on the Wall	58
Installing the Chassis Ground Connection	59
Power Connections	61
Connecting Routers to AC Power	61
Connecting Routers to a DC-Input Power Supply	62
DC Wiring Requirements	62
Connecting Routers to the Cisco Redundant Power System	64
Connecting WAN, LAN, and Voice Cables	64
Ports and Cabling	64
LAN, WAN, and Voice Connection Procedures	65
Connecting to a Console Terminal or Modem	66
Connecting to the Console Port	66
Connecting to the Auxiliary Port	67
Identifying a Rollover Cable	68
Powering Up the Router	69
Checklist for Power Up	69
Front Panel Indicators	69
Power-Up Procedure	70
Configuring the Router	71
Initial Configuration Using SDM	72
Initial Configuration Using the Setup Command Facility	72
Initial Configuration Using the CLI (Manual Configuration)	74
Troubleshooting	77
Isolating Problems	77
Troubleshooting the Power and Cooling Systems	78
Environmental Reporting Features	78
Troubleshooting Modules, Cables, and Connections	79
System Messages	80
Recovering a Lost Password	80
Cisco Technical Assistance Center	80
Using the ROMMonitor	81
Entering ROM Monitor Mode	81
ROM Monitor Commands	82
ROM Monitor Command Syntax Conventions	83
ROM Monitor Command Descriptions	84
Router Management Commands	84
Boot Commands in the ROM Monitor	84
Informational Commands in the ROM Monitor	85
Other Useful ROM Monitor Commands	86
Debugging Commands	86
Configuration Register Commands	87
Recovering Cisco IOS Software Images	88
Copying an Image from the Console Using the xmodem Command	89
Description and Options of the xmodem Command	89
Console Requirements	89
Procedure for the xmodem Command	89
Copying an Image from a TFTP Server Using the tftpdnld Command	90
Restrictions on the tftpdnld Command	90
Procedure for the tftpdnld Command	91
Configuration Register	93
Configuration Register Settings	93
Changing Configuration Register Settings	94
Configuring the Boot Field	95
Enabling Booting from Flash Memory	97

Cisco 2610 Hardware Installation Guide - Page 79

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