Cisco PIX 520 - PIX Firewall 520 User Manual page 18

Installing a Circuit Board in the PIX 520
16 MB Flash Circuit Board
Along with upgrading your Flash memory to 16 MB, the PIX security appliance 16 MB Flash circuit
board includes pre-installed PIX security appliance software and a UR (unrestricted) 56-bit DES
encryption license. The 16 MB Flash circuit board installs into the PIX security appliance ISA slot.
An illustration of the 16 MB Flash circuit board is shown in
Figure 5-21 PIX Security Appliance 16 MB Flash Circuit Board
Use the following information to install a 16 MB Flash circuit board:
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Cisco PIX Security Appliance Hardware Installation Guide
5-18
The PIX security appliance must have a minimum of 32 MB of RAM memory.
You must obtain a new activation key if you will be using 3DES.
The PIX security appliance should not be downgraded to a software revision lower than 5.0(3) after
the new software from the 16 MB circuit board is installed.
If you downgrade from software Version 5.3 to 5.2 or lower, you will lose private data (keys,
certifications, and CRLs) that are stored in Flash memory. You need to use the clear flashfs
command, downgrade 5.0 | 5.1 | 5.2 options if your PIX security appliance has 16 MB Flash
memory, private data stored in the Flash memory, and you used the ca save all command to save
these items in Flash memory.
Chapter 5
Figure 5-21.
PIX 520
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