Unexpected Downtime!

After 8 hours of being under full load, chai (my linux router) panicked, taking the network offline for 3 hours. There's nothing *obviosuly* wrong with the hardware, so I assume it a linux problem. I would have investigated properly, but the stack trace only showed the addresses of functions, not names...

Seeing as one error per 4 years is unacceptably high (from debian stable, of all distros!), I've since started looking into the BSDs; particularly m0n0wall.