Installation guide

2 Upgrading Memory in Cisco 4000 Series Routers

Note In this document, references to the Cisco 4000 series mean all routers in the series.

References to the Cisco 4000 router or to another individual router mean only that router.

Note When a procedure refers to the left side or right side of the chassis, component tray, or

motherboard, unless otherwise speciﬁed, it means as viewed from the front.

Use this document in conjunction with your router installation guide and the Cisco 4000 Series

Public Network Certiﬁcation document. To see translated versions of the warnings in this document,

refer to the Cisco 4000 Series Installation Guide. If you have questions or need help, refer to the

sections “Cisco Documentation” and “Cisco Connection Online” later in this document.

This document contains the following sections:

• Safety Recommendations, page 3

• Memory Systems, page 5

• Tools Required, page 7

• Removing the Component Tray, page 8

• The Cisco 4000 Flash EPROM Card, page 13

• Removing Network Processor Modules, page 16

• Memory Locations, page 18

• SIMM Orientation, page 21

• Upgrading Main Memory, page 22

• Upgrading Shared Memory, page 25

• Upgrading Flash Memory, page 26

• Upgrading the ROM, page 28

• Installing the Flash EPROM Card (Cisco 4000 Router Only), page 29

• Replacing Network Processor Modules, page 30

• Replacing the Component Tray, page 30

• Replacing the Final Connections to the Router, page 30

• Cisco Documentation, page 31

• Cisco Connection Online, page 32

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

equipment.

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.