Re: asa to asa - is it possible to implement GRE tunnel for ospf
You can create GRE tunnel endpoints on 3750 switches and then encrypt the GRE tunnel with IPSec between the ASA5510's. The problem you may run into is that you can't change the mtu of the GRE interface (at least last I checked) and if you run traffic through the GRE tunnel you will run into problems with large packets.
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...