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This section covers other types of error messages that you may encounter, such as bus, parity, timeout, unexpected, and unknown error messages.
These error messages result when the system image crashes, either from a hardware or a software failure. To access these messages, use the bootstrap program as described in the section "System Bootstrap Diagnostics" in either the AGS+ Hardware Installation and Maintenance or the ASM-CS Hardware Installation and Maintenance publications.
When you encounter a timeout, bus error, or unknown error message, you must run the k stack trace command at the bootstrap mode prompt (>).
In the following example, a timeout error message appears, the k stack trace command is run, but no stack trace results.
In the following example an unknown error message appears, the k stack trace command is run, and a stack trace results.
Table 5 describes the fields in this sample stack trace.
Stack Trace Fields
After you obtain the stack trace, use the i (initialize) command before you manually boot up the system image. Then use the show version command (when possible) to identify the software release and version number for use by technical staff.
On systems that have a hardware or a virtual (software) configuration register, and the boot bits (lowest four bits) are set to a value greater than 0, the system will repeatedly try to boot up the appropriate system image from resident ROMs, Flash memory, or a server over the network. If the booting is successful, the system prompt appears. You then can use the show stack command to obtain the stack trace.
In cases where the router crashes repeatedly, send a Break character from the console keyboard to obtain the bootstrap mode prompt. Then modify the configuration register boot bits to zero, enter the i (initialize) command, and manually attempt to bootstrap the system image. If it crashes, use the k stack trace command.
Error Message
Explanation An invalid memory address is accessed, either because of a software bug or because a boot of an incompatible software image was attempted.
Recommended Action If the error occurred when your tried to boot up a system image over the network or from reprogrammed Flash memory, a probable reason could be the use of a wrong or incompatible system image. Look in the appropriate documentation to find out which system image to use. If you still need assistance, contact your technical support representative with the following details:
If the error occurred while trying to boot up a built-in ROM-based image, contact your technical support representative with the following details:
If the error occurred while the system was operational, contact your technical support representative after gathering the following information:
Error Message
Explanation Memory corruption or failure has occurred, most likely because of a hardware problem or by disturbances such as power line problems.
Recommended Action Reboot the system and observe whether the problem recurs. Also ensure that the power line has appropriate protection equipment. If the problem is a one-time occurrence, the cause could be a power line disturbance.
Error Message
Explanation Temperature exceeded the operating range, most likely because of a ventilation, air-conditioning, or hardware problem.
Recommended Action Power off the system and give it time to cool. Check room ventilation and air conditioning. Also ensure that system air-flow grids are not blocked and that blowers are operational. Call your technical support representative if a blower needs replacement.
Error Message
Explanation An invalid memory address is accessed, either because of a software bug or because a boot of an incompatible software image was attempted.
Recommended Action Refer to the Recommended Action for the first "Bus Error control register" message in this section.
Error Message
Explanation An invalid memory address is accessed, either because of a software bug or because of incompatible microcode in a multibus card.
Recommended Action Reseat the card. If this message recurs, call your technical support representative for assistance.
Error Message
Explanation Memory corruption or failure has occurred, most likely because of a hardware problem. Disturbances such as power line problems are also possibilities.
Recommended Action Reboot the system and observe whether the problem recurs. Also ensure that the power line has appropriate protection equipment. If the problem is a one-time occurrence, the cause could be a power line disturbance.
If this message recurs, call your technical support representative for assistance.
Error Message
Explanation Shared (I/O) memory failure or corruption occurred during access by the processor. This problem is most likely due to a hardware failure or by disturbances such as power line problems.
Recommended Action Reboot the system and observe whether the problem recurs. Also ensure that the power line has appropriate protection equipment. If the problem is a one-time occurrence, the cause could be a power line disturbance.
Error Message
Explanation Either a hardware or a software problem has occurred.
Recommended Action Refer to the Recommended Action for the first "Bus Error control register" message in this section.
Error Message
Explanation Either a hardware or a software problem has occurred.
Recommended Action Refer to the Recommended Action for the first "Bus Error control register" message in this section.
Error Message
Explanation Either a hardware or a software problem has occurred.
Recommended Action Refer to the Recommended Action for the first "Bus Error control register" message in this section.
Posted: Wed Jul 2 23:24:35 PDT 2003
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