Cisco PRP-1= Installation And Configuration Manual page 8

Product Overview
Cisco IOS Software Storage
Performance Route Processor Installation and Configuration Guide
8
The PRP-2 contains the following additional components:
SDRAM—Up to 4 GB of Cisco-approved synchronous dynamic
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random-access memory (SDRAM) on two dual in-line memory modules
(DIMMs). 1 GB of SDRAM is the default shipping configuration. SDRAM is
field replaceable only when using Cisco-approved DIMMs.
Software releases prior to 12.0(30)S do not recognize more than 2 GB of
Note
SDRAM and will only use the first 2 GB of the installed memory. This
does not affect the functioning of the PRP-2, but commands such as show
version will indicate that only 2 GB of SDRAM are installed.
Hard disk drive—40-GB hard disk drive can be optionally installed on the
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PRP-2 board.
CF—1-GB compact flash disk can be optionally installed on the PRP-2
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board.
The Cisco IOS software images that run the Cisco 12000 Series Router system are
stored in Flash memory. Two types of Flash memory ship with the PRP-1:
Onboard Flash memory—Ships as a single in-line memory module (SIMM).
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This Flash memory contains the Cisco IOS boot image (bootflash) and is not
field replaceable.
Flash disk—The PRP ships with an ATA Flash disk that can be installed in
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either Flash disk slot. The Flash disk contains the Cisco IOS software image.
Linear Flash memory cards are also supported in the PRP-1.
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