can different files be diff ed?

[Anshuman Kanwar]

Hi all,

  I have a peculiar problem. I need to run nightly comparisons of
configuration files that have been checked in from two different routers. 

(In my case any difference would mean that one of the routers does not have
the latest update of the config.)

So is there any way I could do a cvs diff of 2 different files? Of course, a
little shell script can check out the files and do the same thing, but it
would be more clean if cvs could do it.

Thanks for your time.
-ansh