Memory Replacement Procedures - Cisco 4000 Series Upgrade Manual

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
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