I learned of this command yesterday. It's "hidden", meaning that it doesn't show as a valid command when doing "test ?"
If you do "test crash" and hit enter, you get to a subcommand line "?>" with a lot of options.
What's the purpose of this command, and why would you ever use it? What would it tell you, and how is it useful?
It is used to generate Crash Info, you can simulate a crash scenario with it,
so you can crash the router with different options and then save the logs, and if in future router crashes in real, by matching logs you can find out the cause of crash.