Cisco 1721 - VPN Security Router Bundle Hardware Troubleshooting
Troubleshooting guide
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Cisco - Hardware Troubleshooting for Cisco 1700 Series Routers
Hardware Troubleshooting for Cisco
1700 Series Routers
Interactive: This document offers customized analysis of your
Cisco device.
Contents
Introduction
Prerequisites
Requirements
Components Used
Hardware-Software Compatibility and Memory Requirements
Error Messages
Conventions
Modules and Cards
DSP Optimization on the Cisco 1751 and Cisco 1760 Routers
WIC-1ENET Module
Identifying the Issue
Troubleshooting ISDN Interfaces
Troubleshooting Router Hangs
Troubleshooting Bus Error Crashes
Router Does Not Boot
Router Crashes
Watchdog Timeouts
Router Is Dropping Packets
Memory Leaks
Summary
Related Information
Introduction
Valuable time and resources are often wasted replacing hardware that actually functions properly. This
document helps troubleshoot potential hardware issues with Cisco 1700 Series Routers, and can help
you identify which component may be causing a hardware failure, depending on the type of error that
the router is experiencing.
Note: This document does not cover any software-related failures except for those that are often
http://kbase:8000/paws/servlet/ViewFile/17959/hwts_1700_17959.xml?convertPaths=1
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Table of Contents
Related Manuals for Cisco 1721 - VPN Security Router Bundle
Summary of Contents for Cisco 1721 - VPN Security Router Bundle
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Page 1: Series Routers
Valuable time and resources are often wasted replacing hardware that actually functions properly. This document helps troubleshoot potential hardware issues with Cisco 1700 Series Routers, and can help you identify which component may be causing a hardware failure, depending on the type of error that the router is experiencing. -
Page 2: Components Used
Hardware-Software Compatibility and Memory Requirements Whenever you install a new card, module, or Cisco IOS® software image, it is important to verify that the router has enough memory, and that the hardware and software are compatible with the features you wish to use. -
Page 3: Error Messages
Cisco 1700 Series Router. Tip: If your 1700 does not have a connection to the network or does not have a valid Cisco IOS software image, you may need to use the console port of the router to perform an... - Page 4 Software Release 12.2(2)XJ or later if the card is installed in any WIC slot other than slot 0, or if more than one card is installed. The card can be used with Cisco IOS Software Release 12.2(4)T, but the card must be installed in slot 0, and only one Cisco WIC-1ENET card can be installed in the router.
- Page 5 Capturing information from the console of the router is essential for troubleshooting a router that does not boot. The console output should be logged in a file for later analysis or for the Cisco Technical Assistance Center (TAC) if a TAC case is opened.
- Page 6 Cisco - Hardware Troubleshooting for Cisco 1700 Series Routers Page 6 of 12 Symptom Recommended Action Verify that the power supply is plugged in firmly. If No LEDs are on after powering on the router that does not resolve the issue, replace the power supply.
- Page 7 Cisco - Hardware Troubleshooting for Cisco 1700 Series Routers Page 7 of 12 rommon 2 > reset Router boots in ROMmon; no error messages on the If the router remains in ROMmon, follow the console procedure described in ROMmon Recovery for the Cisco 1700 Series Router.
- Page 8 Watchdog Timeouts Cisco processors have timers that guard against certain types of system hangs. The CPU periodically resets a watchdog timer. The watchdog timer basically controls the time of each process. If the timer is not reset, a trap occurs.
- Page 9 Cisco - Hardware Troubleshooting for Cisco 1700 Series Routers Page 9 of 12 There are two main types of watchdog timeouts. The first type is usually caused by a software problem and is reported in the router console logs as:...
- Page 10 Cisco - Hardware Troubleshooting for Cisco 1700 Series Routers Page 10 of 12 Consequently, the troubleshooting steps are simple. For example, if a router is connected to a switch, the troubleshooting steps would be: 1. Replace the cable. 2. If this does not solve the problem, try another port on the switch.
- Page 11 Problems. Summary If you have identified a component that needs to be replaced, contact your Cisco partner or reseller to request a replacement for the hardware component that is causing the issue. If you have a support contract directly with Cisco, use the TAC...
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Page 12: Related Information
Cisco - Hardware Troubleshooting for Cisco 1700 Series Routers Page 12 of 12 Troubleshooting logs Output from the show technical-support command Related Information Cisco 1700 Series Routers Documentation ROMmon Recovery for the Cisco 1700 Series Router Image Naming Conventions Software Installation and Upgrade Procedures Capacity and Performance Management: Best Practices –...