We have found that VPN tunnel goes down when link on which is it formed is having lots of errors. We are using pre-sahred key to form IPSec between two routers on point to poin tlink. Why it happends that when link is having lots of errors and CRC's IPSec tunnel is not formed. Packets hitting the tunnel never reaches the destination. But at the same time application using https:// works well. The moment we remove crypto ( ipsec commands ) from both routers we could get connectivity. Are errors responsible for IPSsec tunnel formation and tearing it down.
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...