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Upgrading Flash Memory

Figure 8

View from front of chassis

Caution

not touch the surface components.

Step 5

If you are ﬁnished replacing SIMMs, continue with the section "Replacing the Cover" later in this

document.

Upgrading Flash Memory

Cisco 3600 series routers contain one or two 80-pin Flash-memory SIMMs for storing the system

software image. These SIMMs are not interchangeable with DRAM SIMMs. You can upgrade Flash

memory by replacing the existing 4-MB SIMM with an 8-MB SIMM or by adding a SIMM to the

second Flash-memory socket.

SIMMs are manufactured with a polarization notch to ensure proper orientation and alignment holes

to ensure proper positioning, similar to those shown in Figure 9. Cisco 3600 series Flash SIMM

cards are installed with the connector edge down, the polarization notch near the front of the chassis,

and the component side facing the right side of the chassis.

Figure 9

14 Cisco 3600 Series Memory Upgrade Conﬁguration Note

Installing DRAM SIMMs

1. Insert the SIMM into the socket

at an angle from vertical.

2. Push the top of the SIMM

down and back.

The socket guide posts fit through

the holes in the SIMM.

The locking springs clip the back

of the SIMM.

It is normal to feel some resistance, but do not use excessive force on the SIMM, and do

Repeat Step 2 through Step 4 for each SIMM.

Flash-Memory SIMM Orientation and Alignment

Alignment holes

Connector edge

Polarization notch