Someone, I'm not sure exactly who or when, wrote:

> i did exactly the first example indicated in the man (didnt forget to
> create a file to contain it) but it returns me a
> 
>  vnconfig: /dev/rvnd0c: Device not configured

The GENERIC kernel only has 2 vnd's configured.  Used vnd0a or vnd0b, 
instead.

--scott