irule and redirect exception

Oh I see. You have multiple switch statements so it must process the first until it find a match and then process the next where as if it were all under the same switch statement it would stop processing once it found a match. You may try using if/else instead of switch.

if your_file_name { do something } elseif host_to_redirect { redirect } else { default behavior }

If you did this it would stop process on that particular event once it matched on your file name thereby never redirecting.