I planed to upgrade the ASA5520, 512 MB RAM, CPU Pentium 4 Celeron 2000 MHz
Internal ATA Compact Flash, 64MB which met the minimum requirement to upgrade it, I installed the image asa721-k8.bin successfully but once I issued the command (boot system flash:/asa721-k8.bin) I got the error below :
INFO: Converting flash:/asa721-k8.bin to disk0:/asa721-k8.bin
ERROR: Unable to set this url, a maximum of 4 urls may be configured
Then, I installed the image asa722-k8.bin and again once I issued the boot command I got a different error:
INFO: Converting flash:/asa722-k8.bin to disk0:/asa722-k8.bin
ERROR: Unable to set this url, it has already been set Remove the first instance before adding this one.
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...