You also purchased a support contract. Upgrades are tied to the support contract. In theory, if your support contract expires you will no longer have access to AsyncOS upgrades. In practice, you may find you can upgrade but we reserve the right to prevent upgrades for out of support appliances in the future.
I recommend you contact your sales representative to explore renewal options, I bet there is a solution that will guarantee upgrades and provide you access to our support team that is cost effective for your organization.
Even though the M,C,X and S all run on the similiar hardware there is no way to copy across the AsyncOS. The Operating system which defines what the box does is non transferable, what you can do however is turn an out of support unit into a windows or unix box, but not AsyncOS i'm afraid, if you could do this then the whole planet would be doing it.
Also the M-Series is not necessarily the X-Hardware as there is now a M160 1U appliance.
Thank you for everyone's reply. Very clear to me now.
(and nope, we dont' mean to convert without paying the license key, but we are trying to think cost-saving since there is one extra hardware here. And yes, applicance are not just a simple piece of hardware. i get the point).
and in fact, the license seems to be just cost as much as the total applicance... :?
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...