I am preparing a design where I have 2 ASAs in L2L VPN config for main ISP-1 using of course public and static IPs. But it get interesting where we will be adding a backup ISP-2 on each site but only with public and dynamic IPs. Would it be possible to have 2 VPN tunnels L2L configured on each ASA and the tunnel over ISP-1 will be the primary to carry the data and voice traffic and the tunnel over ISP-2 will be the backup tunnel? How is that accomplished? With the metric on the static routes? The thing is that I want the ISP-1 to be always the prefered VPN tunnel (more bandwidth available) when the ISP-1 is restored after the service failure.
In regrards to the ISP-2 and public/dynamic IPs, how can it be accomplished? I thought of on ASA-1 the ISP-2 will be configured as a VPN client to the ASA-2 on ISP-1 (static IP available) and vice verse on the opposite side. But can be ASA configured for both L2L server and client and the same time?
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...