which solution is right and scalable DMVPN or p2p gre over ipsec to establish two tunnels from a branch to head office and Disaster recovery site (which is mirror of headoffice). Primary tunnel to head office and backup tunnek to DR site. when headoffice link fails branches switch to DR Site, when HO links becomes active it again becomes the primary link ....
DMVPN more suits this situation . There are 2 options single DMVPN network with each spoke using a single multipoint GRE tunnel interface and pointing to two different hubs as its Next-Hop-Server (NHS) or Dual DMVPN networks with each spoke having two GRE tunnel interfaces (either point-to-point or multipoint) and each GRE tunnel connected to a different hub router.
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...
[toc:faq]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 and UDP are I...