Specifications

20 Memory Replacement Instructions for the Network Processing Engine and Input/Output Controller

Removing and Replacing Memory DRAM SIMMs, SDRAM DIMMs, and Boot ROMs

Use the following guidelines to ensure easy access to the rear of the router when it is installed in a

rack:

• Ensure that you have at least three to four feet of working space at the rear of the router.

• If cables from other equipment in the rack fall in front of the rear end of the router, carefully

gather the cables (using care not to strain them) and use cable ties to anchor them away from the

rear of the router.

• If access to the rear of the router is partially blocked by a power strip or some other permanent

rack ﬁxture, detach the router from the rack and carefully slide it forward until there is enough

clearance to remove the power supply, the network processing engine, and the subchassis from

the router. Detailed steps for detaching the router from the rack are contained in the “Removing

the Network Processing Engine” section on page 28.

Caution Make sure that at least one other person is available to support the front of the router as

you slide it out from the rack and, if necessary, to continue to support it while you remove and insert

the power supply, network processing engine, or subchassis.

Removing and Replacing Memory DRAM SIMMs, SDRAM DIMMs, and

Boot ROMs

There is one Flash memory SIMM on the I/O controller (see Figure 1), and four main memory

(DRAM) SIMMs on the NPE-100, NPE-150, and NPE-200 network processing engines (see

Figure 2, Figure 3, and Figure 5). There is one (SDRAM) DIMM on the NPE-175 and NPE-225 (see

Figure 4 and Figure 6), and there are two user-upgradable memory (SDRAM) DIMMs on the

NPE-300, DIMM 2 and DIMM 3 (see Figure 7). The replacement instructions differ slightly for the

DRAM SIMMs and the SDRAM DIMMs; the differences are noted in the following procedures. The

replacement instructions are the same for the Flash memory and DRAM SIMMs.

Note Make sure you upgrade the Flash SIMM on any previously purchased I/O controller before

attempting to boot a Cisco 7200 VXR router that has a newly installed NPE-175, NPE-225, or

NPE-300.

There is one DIP-type boot ROM on the I/O controller (see Figure 1), and one PLCC-type boot

ROM on the NPE-175, NPE-200, NPE-225, and NPE-300 (see Figure 4 through Figure 7); the

replacement instructions are different for the two boot ROM types, and the differences are noted in

the following procedures.

The following sections explain how to remove and replace the memory modules on the I/O controller

and the network processing engines:

1 Powering Down the Router and Disconnecting Input Power, page 21

2 Removing the Input/Output Controller, page 26

3 Removing the Network Processing Engine, page 28

4 Removing DRAM or Flash SIMMs, page 30

5 Installing New DRAM or Flash SIMMs, page 31

6 Removing SDRAM DIMMs, page 33

7 Installing New SDRAM DIMMs, page 34