We have a router at the branch upon which both the MPLS and the internet connections are being terminated.
In case of MPLS failure all the data going out to the internet will be encrypted after the tunnel is formed. Encrypted traffic is sent to the HO from where traffic goes to the servers or the internet.
On the router at the branch we will have to use the static routes and I am not sure as of now which routing protocol the ISP is going to use for connectivity to the HO. It could be the MPLS or the frame-relay.
At the HO client do have a ASA firewall. Upon which both the MPLS/frame-relay and the internet connection terminates.
There could be some 35 to 40 locations connected as the MPLS spokes. And we have to confire IPSEC VPN as the failover to the MPLS connection.
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...