If you upgrade the PDM to 2.0 it will not interrupt service.
However, to run PDM V2.0 you need to upgrade your PIX image to 6.2. Just copy the new image into flash. Then when you can afford downtime reboot the PIX. The new image will be loaded and you can run PDM V2.0
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...