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Cisco 12000 - Series Chassis Modular Expansion Base 交換取扱説明書

Important Information

For Cisco 12000 Series Router route processor (RP) and line card removal and installation information,

refer to the installation and configuration publication for the hardware in use.

GRP, PRP, and Line Card Memory Overview

This section provides an overview of the memory systems on the GRP, PRP, and Cisco 12000 Series

Internet Router line cards.

GRP Memory

The GRP uses the following types of memory (see

•

Note

•

PRP Memory

The PRP uses the following types of memory. (See

•

Cisco 12000 Series Router Memory Replacement Instructions

Route memory—Dynamic random access memory (DRAM) enables an onboard processor to run

Cisco IOS software and store network routing tables. You can configure route memory from the

factory default of 128 MB to the maximum configuration of 512 MB.

GRP route memory configurations of 512 MB are only compatible with Product Number

GRP-B=. Cisco IOS Release 12.0(19)S or 12.0(19)ST or later, and ROMMON Release 11.2

(181) or later, are also required.

GRP Flash memory—Single in-line memory module (SIMM) stores the boot helper software that

enables you to boot the router when a valid Cisco IOS software image is not available on a Flash

memory card.

GRP linear Flash memory card—A convenient, offline medium for storing a copy of the default

Cisco IOS software image. This card can be inserted into either of the two Flash memory slots on

the GRP, so that you can load router software into GRP main memory.

GRP erasable programmable read-only memory (EPROM)—Contains a ROM monitor that enables

you to boot the default Cisco IOS software image from a Flash memory card if the Flash memory

SIMM does not contain a boot helper image.

GRP Random access memory—Nonvolatile random-access memory (NVRAM) provides a stable

medium for storing the router's configuration files, the environmental monitoring logs, and the

contents of the router's virtual configuration register.

Route memory—Synchronous dynamic random access memory (SDRAM) enables an onboard

processor to run Cisco IOS software and store network routing tables. You can configure route

memory from the factory default of 512 MB to the maximum configuration of 2 GB.

PRP onboard Flash memory—Single in-line memory module (SIMM) stores the boot helper

software to boot the router when a valid Cisco IOS software image is not available on a Flash disk

or a linear Flash memory card.

Figure 1 on page 4

for memory locations):

Figure 2 on page 6

for memory locations):

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