Hi Stephen,

> On Jan 5, 2021, at 05:55, Stephen Hemminger <[email protected]> 
> wrote:
> 
> I having lots of issues with openwrt stability.
> Today's issue seems to be some device on one leg of the home LAN causing 
> OpenWrt router
> to crash. That leg has Xbox and other audio gear.
> 
> Any idea how to debug this? Is there a way to get serial console?

on ancient MIPS routers:
cat /sys/kernel/debug/crashlog > last_crash_log

can get you some information after the router crashed and rebooted, not sure 
that this works for other architectures though (also not sure the centents will 
help debugging you issue).

Best Regards
        sebastian


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