closed - 2:54 pm on Jan 6, 2004 (gmt 0)

To answer your question, no.

Before crawling reservations.mysite.com, the robot will ask the server for reservations.mysite.com/robots.txt, not www.mysite.com/robots.txt. So what you should do is make a new robots.txt specifically for that subdomain, and put it in the same directory as reservations.mysite.com/index.html (or index.php or whatever your default page is).