Cisco 4500M Installation Guide download pdf (Page 25)

Upgrading Memory in Cisco 4000 Series Routers 25

Upgrading Shared Memory

A shared-memory upgrade entails removing the existing shared-memory SIMMs and replacing

them with the upgraded SIMMs. You must ﬁrst remove the network processor modules from the

component tray. See the section “Removing Network Processor Modules” earlier in this document.

Removing Shared-Memory SIMMs

Follow these steps to remove shared-memory SIMMs:

Step 1 Find the shared-memory SIMM sockets on the motherboard, as shown at the left of

Figure 12, Figure 13, Figure 14, or Figure 15. These sockets hold the SIMMs

horizontally.

Caution Handle SIMMs by the card edges only. SIMMs are ESD-sensitive components and can be

damaged by mishandling.

Step 2 The SIMMs are held in place at each end by spring clips. To remove a SIMM, pull the

clips outward. Holding the SIMM by the edges with your thumb and index ﬁnger, angle

it upward, and pull it out.

Step 3 Place the removed SIMM in an antistatic bag to protect it from ESD damage.

Step 4 Repeat Step 2 and Step 3 for any remaining shared-memory SIMMs.

Installing Shared-Memory SIMMs

Follow these steps to install shared-memory SIMMs:

Step 1 Find the shared-memory SIMM sockets on the motherboard, as shown in Figure 12,

Figure 13, Figure 14, or Figure 15. All sockets should be empty. If they are not, follow

the steps in the previous section, “Removing Shared-Memory SIMMs.”

Caution Handle SIMMs by the card edges only. SIMMs are ESD-sensitive components and can be

damaged by mishandling.

Step 2 Hold the SIMM with the polarization notch toward the rear of the router and the

connector edge toward the left side of the router (as viewed from the front).

Step 3 To insert a SIMM, angle it into position (see Figure 21), then carefully push down and

back on the edges, holding each edge so that it snaps securely into place. The two spring

clips should ﬁt over the edge of the SIMM and hold it horizontally.

Step 4 Ensure that the SIMM is straight and that the alignment holes line up with the plastic

guides on the socket. It is normal to feel some resistance, but do not use excessive force

on the SIMM, and do not touch the surface components.

Step 5 Repeat Step 2 through Step 4 for any remaining shared-memory SIMMs.

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Cisco 4500M Installation Guide Page 25