Working on a device that (I think) fits the definition of netconsole .. . Meaning ... no practical to access the serial port.
Has anyone had any luck getting netconsole working? I have enabled it, and it seems to show up in the logs (below). My netconsole (command line) is below as well .. .but nothing showing up on that machine. I have also tried nc once OpenWrt has booted ... and that works (though it's TCP, not UDP, which surprised me).
It's pretty much 'just' down to enabling it in the system tab (/etc/config/system) and configuring where to send the (sys)log - and then running a syslog server on the other end (you can start with testing it via nc/ netcat, formatting will be messed up, but still readable). The big question is just what dies earlier - the network tends to go out quicker than a serial console in the aftermath of a kernel crash (might still be good enough).