What is it that you are trying to understand or what is that you dont understand about it?
Basically the Group name is going to be extracted from the Tunnel group name you see configured. Then the attributes will be configured on the group-policy (on the router would be like the client configuration group) and on the IPsec attributes on the tunnel group is where you specify the pre-shared key.
The rest is pretty much the same, dynamic crypto maps, the crypto applied on the interface (on global configuration mode not in the interface per-se)
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...