Cisco Systems 1700 manual Router Memory, Types of Memory

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Chapter 1 Cisco 1700 Router Overview

Router Memory

This section describes the types of memory stored in the router and how to find out how much of each type of memory is stored in the router.

For instruction on how to upgrade memory in the router, refer to the “Installing and Upgrading Router Memory” appendix later in this guide.

Types of Memory

The Cisco 1700 router has the following types of memory:

Dynamic random-access memory (DRAM)—This is the main storage memory for the router. DRAM is also called working storage and contains the dynamic configuration information. The Cisco 1700 router stores a working copy of Cisco IOS software, dynamic configuration information, and routing table information in DRAM.

Nonvolatile random-access memory (NVRAM)—This type of memory contains a backup copy of your configuration. If the power is lost or the router is turned off, this backup copy enables the router to return to operation without reconfiguration.

Flash memory—This special kind of erasable, programmable memory contains a copy of the Cisco IOS software. The Flash memory structure can store multiple copies of the Cisco IOS software. You can load a new level of the operating system in every router in your network and then, when convenient, upgrade the whole network to the new level. The Flash memory on the Cisco 1700 router is stored on mini-Flash modules.

 

Cisco 1700 Router Hardware Installation Guide

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78-5405-03

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Contents Cisco 1700 Router Hardware Installation Guide Corporate HeadquartersPage Cisco 1700 Router Hardware Installation Guide Page N T E N T S Wall-Mounting Troubleshooting Vii Viii About This Guide Audience and ScopeOrganization Related PublicationsConventions Xii Xiii Cisco.com Obtaining DocumentationDocumentation DVD Cisco Product Security Overview Documentation FeedbackOrdering Documentation Reporting Security Problems in Cisco Products PsirtObtaining Technical Assistance Cisco Technical Support WebsiteSubmitting a Service Request Definitions of Service Request SeverityObtaining Additional Publications and Information Cisco 1700 Router Hardware Installation Guide 78-5405-03 Cisco 1700 Router Overview Cisco 1700 Router Key Features Key FeaturesFeature Description Connector/Slot Label/Color Description Rear-Panel ConnectorsRear-Panel Ports and LEDs Rear-Panel LEDs LED Label Color DescriptionFront-Panel LEDs PWRACT COLACT/CHØ ACT/CH1Router Memory Types of MemoryAmounts of Memory 1700# show versionRouter Box Contents Equipment When You Use ItUnpacking the Router Additional Required EquipmentHardware Installation Guide that comes with every card NT1Cisco 1700 Router Overview Installing the Cisco 1700 Router Before Installing the RouterConnecting the Router to Your Local Network Connecting the Router to the Local Network Installing WAN Interface Cards Safety InformationInstalling a WAN Interface Card Installing the Cards in Correct SequenceInstalling the Cards Inserting a WAN Interface Card in the Router Connecting Power to the Router Connecting the Power Supply Verifying Your Installation Optional Installation Steps Connecting a PCConnecting a Modem Connecting the Console Cable to the RouterConnecting a Modem to the Router Wall-Mounting Wall-Mount Brackets-Bottom of RouterInstalling the Cisco 1700 Router Installing the Cisco 1700 Router Troubleshooting Contacting Cisco or Your ResellerRecovering a Lost Password Change the Configuration RegisterConfiguration register is Reset the Router Reset the Password Problem Solving Reset the Configuration Register ValueOK LED Diagnostics Troubleshooting WAN Interface Cards and CablesOK LED Blinking Patterns Number of Blinks MeaningTroubleshooting WAN Interface Cards Symptom Possible CausesSymptom Possible Causes Troubleshooting the Power SystemTroubleshooting the Power System Troubleshooting Isdn Isdn S/T Isdn UTroubleshooting Isdn Use show isdn statusTable A-1 Router Specifications Description SpecificationAppendix a Technical Specifications Cabling Specifications Ethernet Cables RJ-45 Pin Signal DirectionTX+ RX+ Specification 10BaseT 100BaseTX Ethernet Network Cabling GuidelinesConsole Cable and Adapters Table B-2 Ethernet Cabling GuidelinesSignal RJ-45 Pin DB-9 Pin DB-25 Pin Table B-3 Console Cable and Adapter PinoutsConsole Terminal Port Console Cable AdapterInstalling and Upgrading Router Memory Opening the Chassis Figure C-1 Removing the Chassis Screws Locating Memory Figure C-2 Cisco 1700 Motherboard-Memory LocationsInstalling a Mini-Flash Module Figure C-3 Mini-Flash ModuleFigure C-4 Installing a Mini-Flash Module Removing a Mini-Flash ModuleInstalling a Dimm Figure C-5 Removing a Mini-Flash ModuleFigure C-6 Installing a Dimm Closing the ChassisFigure C-7 Closing the Chassis Appendix C Installing and Upgrading Router Memory Ordering and Configuring an Isdn Line Isdn BRI Line Configuration RequirementsTable D-1 Isdn BRI Switch Types Isdn BRI Switch TypesSwitch Type Keywords Isdn BRI Provisioning by Switch Type Table D-2 Isdn Provisioning by Switch TypeSwitch Type Provisioning Mterm =Defining Isdn Service Profile Identifiers Isdn Configuration Options Snapshot RoutingBandwidth on Demand and Dial Backup Dial-on-Demand RoutingNumerics IN-2 IN-3 IN-4 IN-5 IN-6
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