How to Fix Cisco Router Crash Completely Issue

Aesthetic Critique 6 Achievements and Influences.

1. When the router is powered on, hold the reset hole or button for about ten seconds, and wait for the indicator light on the router to turn off and the signal chain will be turned on, and the router will be restored to factory mode successfully.

2. The computer connects the router through the network cable, and uses the default IP address of the router and the default login username and password to log in to enter the router background.

It is equivalent to the black box of the router, and according to the information inside, it is constantly analyzed and summarized to find out the cause and avoid the rebirth of the fault.

Important troubleshooting commands that you need to use when your Cisco router crashes.

Show Version: This command displays available information including the router's hardware configuration, Cisco Internet OS version, memory, interfaces, and more. It may just be a hardware bug that causes the router to crash.

This information can also help you understand which version your router is running, as well as how much memory and flash memory is available.

Show stacks: This is also a very useful command that can be used to monitor stack usage and interrupt routines. This command can display information at times such as bus errors or software-induced crashes.

Show Context: This command can save information such as the reason for rebooting the system and stack trace information, and in addition to the core dump information, the Cisco Technical Assistance Center may ask you to provide the information displayed by the show tech-support command. This command displays configuration, statistics, and other information and logs in to the router.

The most recommended mode is to use File Transfer Protocol (FTP), so this article will provide configuration in this case. By the way, whether you're using FTP, RCP, or any other method like the above, make sure the protocol is working properly before creating a core dump file. In other words, before using the pattern, do a test to make sure the system is functioning properly.

For example, you can test that the File Transfer Protocol is working reliably by copying the router's configuration to the server that is set to save the core dump files

router# copy running-config ftp

Since there is no reboot, you need to manually create the core dump file, enter the following command in global mode:

This command is useful in cases where the router is out of order and not the Cisco router crashes. Note this, it will dump all the information in memory, not just the information in use, so it's important to make sure you have enough memory to accept the relevant information. And, I don't recommend doing this for a running router.