https://www.kernel.org/doc/Documentation/networking/netconsole.txt
This module logs kernel printk messages over UDP allowing debugging of problem where disk logging fails and serial consoles are impractical.
It can be used either built-in or as a module. As a built-in, netconsole initializes immediately after NIC cards and will bring up the specified interface as soon as possible. While this doesn't allow capture of early kernel panics, it does capture most of the boot process.
This feature is due for porting to XML/Python in conjunction with the serial console interfaces. As this is only a one-way communication we can not use it to recover the system. For sending log messages to a remote host we usually use syslog.
I'd like to drop this in 1.3
Vyatta docs say:
