Introduction
Over time, new features, bug fixes, and security updates are added to the operating system, and it becomes necessary to upgrade the software on network firewalls. On different devices the commands may be different, but the process of upgrading the software is similar. Below are the steps involved to upgrade the Cisco ASA firewall software:
Description
The first step is to check the current software version, using the command "show version"
Obtain the new software version and store it on a FTP server
It is recommended to backup the running configuration
Verify that there is enough space on the device to store the new software with the "dir", or "show flash:" command
Copy the new software to the device
Install the new software
Reboot the device
Verify that the new software version is running on the device, using the "show version" command
Delete old software images, if more space on the flash memory is needed
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