It all depends on your Fail Open setting and your security posture.
If your primary ASA is set to Fail Closed, then taking the AIP-SSM off line for an upgrade will cause traffic to fail over to the standby ASA. If you are set for Fail Open then traffic will continue to pass thru your primary ASA without IPS inspection untill the AIP-SSM comes back.
Your security posture will dictate how important IPS inspection/dropping is to your organization. Is mainting IPS inspection more important than failing over to the standby rail?
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...