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Cisco router system received a software forced crash

cisco router system received a software forced crash

If you issue a boot system command to boot a Cisco router image on a Cisco , The router crash with software force crash in process_suspend. System received a Software forced crash *** signal= 0x17, code= 0x5, context= 0x0. PC = 0xd4, Cause = 0x20, Status Reg = 0xf Cisco − Hardware Troubleshooting for the Cisco Series Router Table of pmem/iomem: / *** System received a Software forced crash. MANJINDER SINGH SIRSA WINSCP Вы можете прийти к нам.

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1.4 Recovering from a System Crash cisco router system received a software forced crash

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Click on the bug ID hyperlinks to view additional bug details from the Cisco Bug Toolkit registered customers only which can help you determine the correct bug ID match. When you have identified a bug ID that matches your error, refer to the "fixed in" field to determine the first Cisco IOS software version that contains the fix for the bug.

If you are uncertain about the bug ID, or the Cisco IOS software version that contains the fix for the problem, upgrade your Cisco IOS software to the latest version in your release train. This helps because, the latest version contains fixes for a large number of bugs. Even if this fails to resolve the problem, bug reporting and the resolution process is simpler and quicker when you have the latest version of the software.

If, after you use the Cisco CLI Analyzer, you either suspect or have positively identified a bug which remains unresolved, we recommend that you open a TAC service request to provide additional information to help resolve the bug, and for quicker notification when the bug is ultimately resolved. If the problem is identified as a new software bug, a Cisco TAC engineer can request that you configure the router to collect a core dump. A core dump is sometimes required to identify what can be done to fix the software bug.

To collect more useful information in the core dump, we recommend that you use the hidden debug sanity command. This causes every buffer that is used in the system to be sanity-checked when it is allocated and when it is freed. The debug sanity command has to be issued in privileged EXEC mode enable mode and involves some CPU, but does not significantly affect the functionality of the router.

If you want to disable sanity checking, use the undebug sanity privileged EXEC command. Use the configuration procedures in this section. Alternatively, refer to Creating Core Dumps. Type exception dump n. The file name is the Cisco router hostname-core.

On UNIX systems, change the permission mode of the "hostname-core" file to be globally compatible You can check the TFTP setup through the copy running-config tftp command on that file. If the system crashes, the exception dump command creates its output to the above file.

On the router, configure this:. Caution: Please do not manually reload or power-cycle the router before you collect the above information, if possible, as this can cause important information to be lost that is needed to determine the root cause of the problem. Contents Introduction.

Introduction This document explains the most frequent causes of software-forced crashes, and describes the information you must collect in order to troubleshoot. Prerequisites Requirements Readers of this document should have knowledge of these topics: How to Troubleshoot Router Crashes. Components Used This document is not restricted to specific software and hardware versions. Conventions For more information on document conventions, refer to the Cisco Technical Tips Conventions.

If you have not power-cycled or manually reloaded the router, output from the show version command displays this: Router uptime is 2 days, 21 hours, 30 minutes System restarted by error - Software-forced crash , PC 0xEF90 at edt System image file is "flash:cis-l.

Possible Causes This table explains the possible reasons for software-forced crashes: Reason Explanation Watchdog timeouts The processor uses timers to avoid infinite loops, and causes the router to stop responding. In normal operation, the CPU resets those timers at regular intervals. Failure to do so results in a system reload. Watchdog timeouts that are reported as software-forced crashes are software-related. Refer to Troubleshooting Watchdog Timeouts for information about other types of watchdog timeouts.

The system was stuck in a loop before the reload. Therefore, the stack trace is not necessarily relevant. In this case, the event is reported as a software-forced crash. In this case, you can load a new image onto the router to resolve the issue. Other faults The errors that cause crashes are often detected by processor hardware, which automatically calls special error-handling code in the ROM monitor.

The ROM monitor identifies the error, prints a message, saves information about the failure, and restarts the system. Line Emulator Trap. Processor Memory Parity Error. Reserved Exception. Restarted by Error. Segmentation Violation Exception. Shared Memory Parity Error. Software-forced Crash. Trace Trap. Undefined Trap. Unexpected Hardware Interrupt. Unknown Failure. Unknown Reload Cause. Watchdog Timeout. Write Bus Error Interrupt. Sometimes, only a specific router module crashes, and not the router itself.

Here are some documents that describe how to troubleshoot crashes on some router modules:. Troubleshooting VIP Crashes. When a crashinfo is available in bootflash, this information is displayed at the end of the show stacks command:. If you still need assistance after you complete the troubleshooting steps, and want to open a service request with the Cisco TAC, be sure to include this information for troubleshooting a router crash:. Attach the collected data to your service request in non-zipped, plain text format.

If you cannot access the Service Request tool, you can attach the relevant information to your service request by sending it to attach cisco. Note : Do not manually reload or power-cycle the router before you collect the information unless required to troubleshoot a router crash. This can cause important information to be lost that is needed to determine the root cause of the problem.

Skip to content Skip to search Skip to footer. Log in to Save Content. Available Languages. Download Options. Updated: November 18, Contents Introduction. Introduction This document describes how to troubleshoot router crashes. Prerequisites Requirements There are no specific requirements for this document. Components Used This document is not restricted to specific software and hardware versions.

Get Information About the Crash When the router crashes, it is extremely important to gather as much information as possible about the crash before you manually reload or power-cycle the router. The show version EXEC command displays the configuration of the system hardware, the software version, the names and sources of configuration files and software images, the router uptime, and information on how the system has been restarted.

IMPORTANT: If the router is reloaded after the crash for example, if it has been power-cycled or the reload command has been issued , this information will be lost, so try to collect it before reloading! The show stacks EXEC command is used to monitor the stack usage of processes and interrupt routines.

The show stacks output is one of the most indispensable sources of information to collect when the router crashes. IMPORTANT: If the router is reloaded after the crash for example, through power-cycle or the reload command , this information will be lost so try to collect it before reloading! Context information is specific to processors and architectures, whereas software version and uptime information are not.

Context information for different router types could therefore differ. The output displayed from the show context command includes: the reason for the system reboot. This command is useful in collecting general information about the router when you report a problem.

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