Upgrading the Cisco Security Appliance Operating System
There are three procedures for upgrading a PIX Firewall OS. The use of these procedures is
determined by which PIX Firewall OS is currently running on the PIX device and the model
of the Cisco Security Appliance:
■ You can use the copy tftp flash command with any Cisco Security Appliance model
running PIX software version 5.1.1 or later, or ASA Software version 7.0.1 or later.
■ PIX devices that do not have an internal floppy drive (501, 506(E), 515(E), 525, and
535) come with a read-only memory (ROM) boot monitor program that is used to
upgrade the image of the Cisco PIX Firewall. For PIX devices that are running version
5.0 and earlier, a boothelper disk is required to create boothelper mode, similar to ROM
monitor mode.
■ PIX Firewall version 6.2 introduces a Hypertext Transfer Protocol (HTTP) client that
lets you use the copy http command to retrieve PIX Firewall configurations, software
images, or Cisco PDM software from any HTTP server.