for ur considerations u need to have proper IGP routing like ospf/eigrp or static route between sites tunnels and consider each routing protocols parameters like with ospf u can use cost to prefer tunnel over tunnel while with eigerp u need to consider the use of delay and the split-horizen as well
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...