Cisco 4500-M Upgrade Manual - Page 11

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Also for Cisco 4500-M: Installation Manual (18 pages), Replacement Manual (16 pages)

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Figure 7

Memory Replacement Procedures

There are two DRAM systems in Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M

routers. One is the shared memory, which is the interface that the network processor modules send

data to or transmit data from, and the other is the primary or main memory, which is reserved for the

CPU. The ROM monitor is stored in an EPROM device on the motherboard. (See Figure 8.) In

addition, these routers have two Flash memory systems: one for the Cisco IOS software image and

one for the boot helper image. (See Figure 2.)

Caution

damaging the underlying system card, avoid using excessive force when you remove or replace

SIMMs.

The Cisco 4500 and Cisco 4500-M main memory upgrade requires replacing the main memory

conﬁguration of 8 MB (two 4-MB SIMMs) with two 8-MB SIMMs (Cisco 4500-M only) or two

16-MB SIMMs (Cisco 4500 and Cisco 4500-M).

The Cisco 4700 and Cisco 4700-M main memory upgrade requires replacing the main memory

conﬁguration of 16 MB (two 8-MB SIMMs) with two 16-MB SIMMs for 32 MB (Cisco 4700 and

Cisco 4700-M) or with two 32-MB SIMMs for 64 MB (Cisco 4700-M).

The Cisco 4500 and Cisco 4500-M shared memory upgrade permits you to replace the shared

memory SIMM with one 16-MB SIMM (Cisco 4500 and Cisco 4500-M) or one 8-MB SIMM

(Cisco 4500-M only).

The Cisco 4700 and Cisco 4700-M shared memory upgrade permits you to replace the shared

memory SIMM with one 16-MB SIMM or one 8-MB SIMM.

Network Processor Module and Connector Locations

Safety latch

To avoid damaging ESD-sensitive components, observe all ESD precautions. To avoid

Upgrading Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M Memory

Module handles

Module mounting

screw

Memory Replacement Procedures

Male module

connector

(cutaway view)

Chassis

wall

Female module

connector on the

motherboard