Trouble shooting router crashes. Setting up crash logs

Hi,

I'd like this topic to provide some general advice on trouble shooting router reboots. I couldn't find much material on this.

My router started to behave quite chimeric and reboots without apparent reason. I suspect it might be something HW related, but I am not sure. I just don't see any apparent triggers.

I couldn't find any logs older than since current boot. Is there a way to get some info on random crashes? Preferably without opening the case.

Start with the OpenWRT list of logging options...

https://wiki.openwrt.org/doc/howto/log.overview

What is the temperature of the router CPU? Overheating can cause similar issues.