DMVPN + IPSec protected VRFs; IPSec SAs established only on one tunnel interface
I have a setup between two Cisco ISR routers, running IOS 15.1(4)M3. I have tried to establish DMVPN connectivity with two VRFs (ie. two tunnel interfaces per router) between the routers and it mostly seems to be working as I expected. But... IPSec SAs seem to get tied to only one of the tunnel interface, not two (one per direction) per tunnel interface as they should. There's no MPLS backbone in between the routers, only "global VRF", routed IP network.
Command "show crypto ipsec sa" or indirectly a missing OSPF neighborhood between the routers verifies the erroneuous situation. Occasionally, after an "interface tunnel[ 0 or 1] shut, no shut" or "clear crypto sa" command I seem to get it up and running, two SAs per tunnel interface, but if I reboot either one of the routers or just clear the IPSec SA, they most likely will appear under either one of two tunnel interfaces. So, what should I change to instruct the router setup SAs correctly, two SAs (one per direction) per tunnel interface?
I'll enclose appropriate parts of the configurations and output of command "show crypto ipsec sa".
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...