Re: Zero Downtime Upgrade ASA5520 - 8.0(3) to 8.2(1)
I do not think this is possible, as even with statefull failover configured, once 1 device is reloaded - it will reload on a different versions. You cannot have statefull/failover working on 2 units on seperate versions
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...