I have 30 locations hub and spoke off from an mpls network. There is also a DSL vpn backup to each location. Both MPLS and VPN terminate into a 2811 onsite at the remote branches. We are using IPsec VPN Tunnels. We are using eigrp as a routing protocal with a floating static at the remotes. So when the mpls goes down at the remote traffic is routed accross the higher cost vpn link.
That said how can we keep the tunnels up full time? Then how can we monitor the tunnel?
You could use GRE over IPSec to satisfy this requirement and then influence path selection with EIGRP. You could then monitor either the logical tunnel interface or a loopback interface. Alternatively you could look at a DMVPN network for backup.
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...