Cisco 4500-M Посібник з оновлення - Сторінка 5

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

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.

Required Tools

The following tools are required to remove and upgrade main, shared, Flash, and ROM monitor

memory.

•

ESD cord and wrist strap

•

Number 1 and Number 2 Phillips screwdrivers

In addition, the ROM monitor device upgrade requires the following:

•

EPROM removal tool or small ﬂat-blade screwdriver

Proceed to the next section, "Accessing the Internal Components of the Router."

Accessing the Internal Components of the Router

You must open the router chassis to gain access to the router's internal components: the network

processor modules, boot ROMs, and jumpers.

Refer to the previous section, "Required Tools," for the tools needed for the following procedures.

Warning

with telephone-network voltages.

Warning

activity.

Warning

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.

Removing the Component Tray Procedure

Some Cisco 4000 series routers have a safety latch tab on the chassis that affects removing the

component tray. (See Figure 3 and Figure 4.)

If you have a chassis with a safety latch tab, follow the procedure in the next section "Removing the

Component Tray from a Chassis with a Safety Latch."

If you have a chassis without a safety latch tab, follow the procedure in the section "Removing the

Component Tray from a Chassis without a Safety Latch."

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

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

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

Upgrading Cisco 4500, Cisco 4500-M, Cisco 4700, and Cisco 4700-M Memory

Required Tools