06-14-2009 08:59 AM
It depends on the size. You can download lists of up to 1,000,000 entries to the ServerIron without affecting the service. There are two lists - the list which is currently getting used and another one which is getting used for the download. The active list is getting swapped with the new list after the download. Traffic is getting blocked by default in case the list is bigger than 1,000,000 entries. There is a possibility to send traffic to a so called default group instead of blocking it.