You cannot migrate from 1113 Appliances directly, so you need to back-up the data from the appliance, set up a migration machine (windows server for ACS install), install the a supported migrated version. Restore the data to this windows ACS. Migrate from this box to ACS 5 (VM or Appliance). More info: http://tools.cisco.com/squish/cd545
ACS 4.x Elements Supported and un-supported in the Migration Process. Whole list is available for your review:
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...