Cisco 3600 Series Guida rapida

Doc. No.

Cisco Systems, Inc.

170 West Tasman Drive

San Jose, CA 95134-1706

USA

Cisco Systems, Inc.

Corporate Headquarters

Cisco 3600 Series Memory Upgrade

Conﬁguration Note

Product Numbers:

MEM3600-4FS=, MEM3600-8FS=, MEM3620-4D=, MEM3620-8D=, MEM3620-16D=,

MEM3640-4D=, MEM3640-8D=, MEM3640-16D=, MEM3640-32D=

CPAMEM3600-4FS=, CPAMEM3600-8FS=, CPAMEM3620-4D=, CPAMEM3620-8D=,

CPAMEM3620-16D=, CPAMEM3640-4D=, CPAMEM3640-8D=, CPAMEM3640-16D=,

CPAMEM3640-32D=

This document describes how to upgrade dynamic random-access memory (DRAM) single in-line

memory modules (SIMMs), Flash-memory SIMMs, and read-only memory (ROM) in a Cisco 3620

or Cisco 3640 router.

Note In this document, the term “Cisco 3600 series” refers to the Cisco 3620 and Cisco 3640

routers.

Use this document in conjunction with your router installation and conﬁguration guide and the

Regulatory Compliance and Safety Information document for your router. If you have questions or

need help, refer to the section “Obtaining Service and Support” later in this document.

This document contains the following sections:

•Safety Recommendations, page 3

•Tools and Equipment Required, page 4

•Removing the Cover, page 4

•Upgrading DRAM, page 7

78-3636-01

2Cisco 3600 Series Memory Upgrade Conﬁguration Note

•Upgrading Flash Memory, page 14

•Upgrading the ROM, page 18

•Replacing the Cover, page 21

•Replacing Connections to the Router, page 22

•Obtaining Service and Support, page 23

•Cisco Connection Online, page 23

Warning Only trained and qualiﬁed personnel should be allowed to install or replace this

equipment. (To see translated versions of this warning, refer to the Regulatory Compliance and

Safety Information document that accompanied the router.)

Warning Before working on a chassis or working near power supplies, unplug the power cord on

AC units; disconnect the power at the circuit breaker on DC units. (To see translated versions of this

warning,referto the Regulatory Complianceand Safety Informationdocument that accompaniedthe

router.)

Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the

power cord. (To see translated versions of this warning, refer to the Regulatory Compliance and

Safety Information document that accompanied the router.)

The following warning applies to routers with a DC power supply:

Warning Before performing any of the following procedures, ensure that power is removed from

the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that

services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of

the circuit breaker in the OFF position. (To see translated versions of this warning, refer to the

Regulatory Compliance and Safety Information document that accompanied the router.)

Caution To avoid damaging electrostatic discharge (ESD)-sensitive components, ensure that you

have discharged all static electricity from your body before opening the chassis. Before performing

procedures described in this document, review the next section, “Safety Recommendations.”

Note When a procedure refers to the left side or right side of the chassis, it means as viewed from

the front.

Cisco 3600 Series Memory Upgrade Configuration Note 3

Safety Recommendations

Follow these guidelines to ensure general safety:

•Keep the chassis area clear and dust-free during and after installation.

•Place the removed chassis cover in a safe place.

•Keep tools away from walk areas where you or others could fall over them.

•Do not wear loose clothing that may get caught in the chassis. Fasten your tie or scarf and roll up

your sleeves.

•Wear safety glasses when working under conditions that may be hazardous to your eyes.

•Do not perform any action that creates a potential hazard to people or makes the equipment

unsafe.

Warning The ISDN connection is regarded as a source of voltage that should be inaccessible to

user contact. Do not attempt to tamper with or open any public telephone operator (PTO)-provided

equipment or connection hardware. Any hardwired connection (other than by a nonremovable,

connect-one-time-only plug) must be made only by PTO staff or suitably trained engineers. (To see

translated versions of this warning, refer to the Regulatory Compliance and Safety Information

document that accompanied the router.)

Warning The Ethernet 10BaseT, Token Ring, serial, console, and auxiliary ports contain safety

extra-low voltage (SELV) circuits. BRI circuits are treated like telephone-network voltage (TNV)

circuits. Avoid connecting SELV circuits to TNV circuits. (To see translated versions of this

warning,referto the Regulatory Complianceand Safety Informationdocument that accompaniedthe

router.)

Safety with Electricity

Warning Beforeworkingon equipmentthat isconnected topowerlines,removejewelry (including

rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and

can cause serious burns or weld the metal object to the terminals. (To see translated versions of this

warning,referto the Regulatory Complianceand Safety Informationdocument that accompaniedthe

router.)

Follow these guidelines when working on equipment powered by electricity:

•Locate the room’s emergency power-OFF switch. Then, if an electrical accident occurs, you can

quickly shut the power OFF.

•Before working on the system, turn OFF the power and unplug the power cord.

•Disconnect all power before doing the following:

—Working on or near power supplies

—Installing or removing a router chassis or network processor module

—Performing a hardware upgrade

•Do not work alone if potentially hazardous conditions exist.

4Cisco 3600 Series Memory Upgrade Conﬁguration Note

Tools and Equipment Required

•Look carefully for possible hazards in your work area, such as moist ﬂoors, ungrounded power

extension cables, and missing safety grounds.

•Never assume that power is disconnected from a circuit. Always check.

•If an electrical accident occurs, proceed as follows:

—Use caution, and do not become a victim yourself.

—Turn off power to the system.

—If possible, send another person to get medical aid. Otherwise, determine the condition of the

victim and then call for help.

—Determine if the person needs rescue breathing or external cardiac compressions; then take

appropriate action.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when

electronic printed circuit cards are improperly handled and can result in complete or intermittent

failures. Always follow ESD prevention procedures when removing and replacing cards. Ensure that

the router chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap,

ensuring that it makes good skin contact. Connect the clip to an unpainted surface of the chassis

frame to safely channel unwanted ESD voltages to ground. To properly guard against ESD damage

and shocks, the wrist strap and cord must operate effectively. If no wrist strap is available, ground

yourself by touching the metal part of the chassis.

Caution For safety, periodically check the resistance value of the antistatic strap, which should be

between 1 and 10 megohms (Mohm).

Tools and Equipment Required

You need the following tools and equipment to remove and install SIMMs in a Cisco 3600 series

router:

•Number 1 Phillips screwdriver

•ESD-preventive wrist strap

Removing the Cover

To gain access to memory in a Cisco 3600 series router, you must ﬁrst remove the chassis cover.

Warning Before working on a chassis or working near power supplies, unplug the power cord on

AC units; disconnect the power at the circuit breaker on DC units. (To see translated versions of this

warning,referto the Regulatory Complianceand Safety Informationdocument that accompaniedthe

router.)

Cisco 3600 Series Memory Upgrade Configuration Note 5

Removing the Cover

Warning Do not touch the power supply when the power cord is connected. For systems with a

power switch, line voltages are present within the power supply even when the power switch is off

and the power cord is connected. For systems without a power switch, line voltages are present

within the power supply when the power cord is connected. (To see translated versions of this

warning,referto the Regulatory Complianceand Safety Informationdocument that accompaniedthe

router.)

The following warning applies to routers with DC power supplies:

Warning Before performing any of the following procedures, ensure that power is removed from

the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that

services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of

the circuit breaker in the OFF position. (To see translated versions of this warning, refer to the

Regulatory Compliance and Safety Information document that accompanied the router.)

Follow this procedure to remove the chassis cover:

Step 1 Turn OFF power to the router.

Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact

with telephone-network voltages. (To see translated versions of this warning, refer to the Regulatory

Compliance and Safety Information document that accompanied the router.)

Warning Do not work on the system or connect or disconnect cables during periods of lightning

activity. (To see translated versions of this warning, refer to the Regulatory Compliance and Safety

Information document that accompanied the router.)

Step 2 Remove all network interface cables from the rear panel.

Step 3 If the router is rack- or wall-mounted, remove it from the rack or wall.

Step 4 Place the router so the front panel is closest to you. Remove the three screws located on

top of the cover near the front edge. (Figure 2 shows these screws for the Cisco 3620

cover, and Figure 3 shows the screws for the Cisco 3640 cover.) Set the screws aside in a

safe place.

Step 5 Lift the front edge of the cover about 1 inch (2.5 cm) above the chassis, as shown in

Figure 1.

6Cisco 3600 Series Memory Upgrade Conﬁguration Note

Removing the Cover

Figure 1 Lifting the Cover

Step 6 Pull the cover toward you until the metal tabs on the rear edge separate from the chassis

bottom. (See Figure 2 for the Cisco 3620 and Figure 3 for the Cisco 3640.)

Figure 2 Removing the Cisco 3620 Cover

H7242

Screw

PCMCIA

ACTIVE

READY

SYSTEM

CON AUX

RPS

H7241

Screw

PCMCIA

ACTIVE

READY

SYSTEM

CON AUX

RPS

Cisco 3600 Series Memory Upgrade Configuration Note 7

Upgrading DRAM

Figure 3 Removing the Cisco 3640 Cover

Step 7 Lift the cover free and set it aside.

When you are ready to replace the cover, refer to the section “Replacing the Cover” later in this

document.

If you are replacing DRAM SIMMs, continue with the next section, “Upgrading DRAM.” If you are

upgrading your Flash memory, continue with the section “Upgrading Flash Memory” later in this

document.

Upgrading DRAM

This section describes how to upgrade DRAM on the system card. You might need to upgrade

DRAM for the following reasons:

•You have upgraded to a new Cisco Internetwork Operating System (Cisco IOS) feature set or

release.

•You are using very large routing tables or many protocols (for example, when the router is set up

as part of both a large external network and your internal network).

Cisco 3620 DRAM

The Cisco 3620 router contains four 72-pin single SIMM sockets (or banks) for DRAM, numbered

0 through 3. (See Figure 4.) Each socket can be ﬁlled with a single 32-bit-wide, 72-pin DRAM

SIMM. You can use the memory-size iomem software command to conﬁgure DRAM as a mixture

of shared memory, which is used for data transmitted or received by network modules and WAN

interfacecards, and primary or main memory, which is reservedfor the CPU. For further information

about this command, refer to the Cisco IOS conﬁguration guides and command references.

Note DRAM in the Cisco 3620 supports only single-bank SIMMs and 32-bit operation.

H7043

Screw

ACTIVE

READY

123

PCMCIA

SYSTEM CON AUX

RPS

8Cisco 3600 Series Memory Upgrade Conﬁguration Note

Upgrading DRAM

Figure 4 Cisco 3620 DRAM SIMM Locations

Only certain combinations of DRAM SIMMs are permitted. These combinations are shown in

Table 1. (Memory conﬁgurations that are too small to run the Cisco IOS software are not shown.)

Table 1 Cisco 3620 32-Bit-Wide DRAM Conﬁgurations

Bank 0

(SIMM 0)

(MB)

Bank 1

(SIMM 1)

(MB)

Bank 2

(SIMM 2)

(MB)

Bank 3

(SIMM 3)

(MB)

Total

Memory

(MB)

444–12

4 81– – 12

448–16

4 16 – – 20

84––12

88––16

8 16 – – 24

884–20

888–24

884424

884828

888428

8 8 16 – 32

H7317

DRAM SIMMs

0 1 2 3

Cisco 3600 Series Memory Upgrade Configuration Note 9

Upgrading DRAM

Cisco 3640 DRAM

The Cisco 3640 router contains four 72-pin SIMM sockets or banks for DRAM, numbered 0 through

3. (See Figure 5.) Each socket can be ﬁlled with a single 32-bit-wide, 72-pin DRAM SIMM. You

can conﬁgure DRAM in software as a mixture of shared memory, which is used for data transmitted

or received by network modules and WAN interface cards, and primary or main memory, which is

reserved for the CPU. For further information, refer to the Cisco IOS conﬁguration guides and

command references.

You can conﬁgure DRAM in the Cisco 3640 router to be either 32 bits wide or 64 bits wide. The

64-bit mode can use both single-bank and dual-bank SIMMs. To use 64-bit mode, you must install

DRAM SIMMs in pairs of the same size.

Note In 32-bit mode, the router performs approximately 20 percent slower than when DRAM is

conﬁgured for 64-bit mode.

1. 8 = Single-bank SIMM, 8 MB in size.

16 – – – 16

16 4 – – 20

16 8 – – 24

16 16 – - 32

16 16 4 – 36

16 16 8 – 40

16 16 4 4 40

16 16 8 4 44

16 16 4 8 44

16 16 8 8 48

16 16 16 – 48

16 16 16 4 52

16 16 4 16 52

16 16 16 8 56

16 16 8 16 56

16 16 16 16 64

Table 1 Cisco 3620 32-Bit-Wide DRAM Conﬁgurations (Continued)

Bank 0

(SIMM 0)

(MB)

Bank 1

(SIMM 1)

(MB)

Bank 2

(SIMM 2)

(MB)

Bank 3

(SIMM 3)

(MB)

Total

Memory

(MB)

10 Cisco 3600 Series Memory Upgrade Conﬁguration Note

Upgrading DRAM

Figure 5 Cisco 3640 DRAM SIMM Locations

Only certain combinations of DRAM SIMMs are permitted. These combinations are shown in

Table 2 for 64-bit conﬁgurations, and in Table 3 for 32-bit conﬁgurations. (Memory conﬁgurations

that are too small to run the Cisco IOS software are not shown.)

Follow these rules to use 64-bit mode DRAM conﬁguration:

•The SIMMs in sockets 0 and 1 must be the same size (in MB) and have the same access time (in

nanoseconds).

•The SIMMs in sockets 2 and 3 must be the same size and have the same access time.

•The size of the SIMMs in sockets 2 and 3 must be less than or equal to the size of the SIMMs in

sockets 0 and 1.

Table 2 Cisco 3640 64-Bit-Wide DRAM Conﬁgurations

Bank 0

(SIMM 0)

(MB)

Bank 1

(SIMM 1)

(MB)

Bank 2

(SIMM 2)

(MB)

Bank 3

(SIMM 3)

(MB)

Total

Memory

(MB)

444416

818––16

8 dual28 dual – – 16

884424

8 dual 8 dual 4 4 24

888832

8 8 8 dual 8 dual 32

H7081

DRAM SIMMs

0123

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