The basic thing is I put the command "monitor-interface inside" and "monitor-interface outside|" in the configuration and the active one is not going down when the inside interface of the active unit goes down .
The attached is the show failover output in normal condition
I see you are using LAN-based failover using management 0/0 interface.
Looks like the failover is active but they are failing because there is no link between the PORXY interfaces which is affecting your failover. Make sure that both devices can ping each other PROXY interfaces. you can deselect that interface for now and test your failover again.
I suggest you also upgrade the software because V7.0(4)12 is old.
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...