I would like to upgrade the asa version of my cisco asa 5510 from 7.2 to 8.x(latest version). Will this upgrade be smooth? Do i need to check to see if my entire configuration stay the same after upgrade? Anything to look for during this upgrade? Pls advise. Thks in advance.
It depends on what you mean by "8.x (latest version)". If you mean 8.3, the configuration will be significantly different. If you mean the latest 8.0 or 8.2 build, things will be fairly similar but you'll still want to check the release notes for new features, open caveats, and configuration changes. Here are the ASA release notes:
I went from 7.0.4 to 8.22 without any issues whatsoever.
Do you have a failover set of ASA's? If so, you can use the zero-downtime upgrade. After you've upgraded one of them let it become the primary and if there are major issues fail back to the other while you roll back the upgrade.
As stated above, 8.3 is a whole different story as it changes the way NAT is configured.
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...
[toc:faq]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 and UDP are I...