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Cisco ASA 5500 Series Hardware Installation Guide
OL-10089-01
Chapter 1 Overview
Memory Requirements
Memory Requirements
Table 1-3 lists the standard and recommended flash memory and DRAM. Note that the shipping DRAM
increased after February 2010; the DRAM requirements for 8.3 and higher match the newer default
shipping sizes. See Memory Upgrade Kits, page 1-5 for the information to order an upgrade kit. The
newer default shipping DRAM is the current maximum DRAM you can install in your unit.
In a failover configuration, the two units must have the same hardware configuration. They must be the
same model, have the same number and types of interfaces, and the same amount of RAM.
Note The two units do not have to have the same size Flash memory. If using units with different Flash
memory sizes in your failover configuration, make sure the unit with the smaller Flash memory has
enough space to accommodate the software image files and the configuration files. If it does not,
configuration synchronization from the unit with the larger Flash memory to the unit with the smaller
Flash memory will fail.
For more information, see the Cisco Security Appliance Command Line Configuration Guide.
Memory Upgrade Kits
Table 1-4 lists the DRAM upgrade kits.
Table 1-3 Standard Memory Requirements for the Cisco ASA Series
ASA Model
Internal Flash Memory
(Default Shipping)
1,2
1. For the ASA 5510 through 5550, you might need to upgrade the internal flash memory to 512 MB or add external flash
memory if you load multiple images of the AnyConnect client along with one or more images of the ASA software, ASDM,
client/server plugins, or Cisco Secure Desktop. In particular, you might need to upgrade for multiple AnyConnect 3.0 and
higher clients with optional modules. The ASA 5505 does not have a flash memory upgrade available.
2. The default internal flash memory for some models was 64 MB in the past; if you have one of these early units, we recommend
upgrading your flash memory to at least the new shipping default.
DRAM (Default Shipping)
Before Feb. 2010 After Feb. 2010
(Required for 8.3 and Higher)
5510 256 MB 256 MB 1 GB
5520 256 MB 512 MB 2 GB
5540 256 MB 1 GB 2 GB
5550 256 MB 4 GB 4GB
Table 1-4 DRAM Upgrade Kits
Model Size Part Number
ASA 5510
1
1. If you previously purchased the 512 MB upgrade kit for the ASA 5510
(ASA5510-MEM-512=), you must upgrade to the 1 GB memory upgrade kit
to run Version 8.3.
1 GB ASA5510-MEM-1GB=
ASA 5520 2 GB ASA5520-MEM-2GB=
ASA 5540 2 GB ASA5540-MEM-2GB=
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