We currently have a set of ASA5520's in resilient failover mode and wish to upgrade them to 5550's. The problem is we would like to have no downtime of the Firewalls.
I have an idea of replacing the the Standby first with a 5550 and bringing on line with the Primary 5520. Then failing over to make the 5550 Primary and the 5520 Secondary. Then upgrade the Secondary 5520 to a 5550. Leaving us with a succesfull upgrade to ASA5550's and no down time.
Has any one done this or can see an issue with this type of upgrade path.
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...