Cisco 2511 - Router - EN Guida Utente

About This Guide xviiAbout This GuideThis section discusses the objectives, audience, organization, and conventions of theCisco 2500 Series Access Se

1-6 Cisco 2500 Series Access Server User GuideSystem Specifications

A-42 Cisco 2500 Series Access Server User GuideModemsLine security optionsThe login tacacs command allows for centralized and enhanced security with a

Internetworking Primer A-43ModemsCommunicating with the ModemYou must establish communication with your modem before you can configure it, whichrequir

A-44 Cisco 2500 Series Access Server User GuideModemsTesting the Modem ConnectionAfter connecting to the modem with a reverse Telnet, you need to test

Internetworking Primer A-45ModemsStep 2 Test Communications with the modem:atOKStep 3 Suspend the Telnet session by entering Ctrl-Shift-6-x:- suspend

A-46 Cisco 2500 Series Access Server User GuideModemsDetermine the Modem Initialization StringThe initialization string is used to configure the modem

Internetworking Primer A-47ModemsProper DTR InterpretationThe modem must interpret a toggle of the DTR signal as a command to drop any active calland

A-48 Cisco 2500 Series Access Server User GuideModemsMost modems use the setting s0=1 to answer the call after one ring. Refer to your modemdocumentat

Internetworking Primer A-49Asynchronous ProtocolsTesting the Dial-In ConnectionThe access server and modem are now correctly configured for dial-in ac

A-50 Cisco 2500 Series Access Server User GuideAsynchronous ProtocolsThe EXEC SessionWhen a dial-in user connects to an asynchronous line on the acces

Internetworking Primer A-51Asynchronous ProtocolsConfiguring Asynchronous PortsCisco 2500 series access servers have 8 or 16 asynchronous ports (plus

CHAPTER Preparing to Install the Cisco 2500 Series Access Server 2-1Preparing to Install the Cisco2500 Series Access Server2This chapter describes the

A-52 Cisco 2500 Series Access Server User GuideAsynchronous ProtocolsModem ConfigurationSee the section “Modems” earlier in this appendix for assistanc

Internetworking Primer A-53Asynchronous ProtocolsStep 2 Enable IP and IPX (or other protocols) by assigning network numbers. (IP can beconfigured by e

A-54 Cisco 2500 Series Access Server User GuideAsynchronous ProtocolsNote For additional information on these commands, see the publication Access Ser

Internetworking Primer A-55Asynchronous ProtocolsARA AuthenticationYou can use the line configuration command autoselect arap to launch ARA protocolau

A-56 Cisco 2500 Series Access Server User GuideAsynchronous Protocols!interface asynchronous 1ip unnumbered ethernet 0ipx network B011encapsulation pp

APPENDIX Maintaining the Cisco 2500 Series Access Server B-1BMaintaining the Cisco 2500Series Access ServerThis appendix contains information about ma

B-2 Cisco 2500 Series Access Server User GuideOpening the ChassisOpening the ChassisThis section describes the procedure for opening the chassis by re

Maintaining the Cisco 2500 Series Access Server B-3Opening the ChassisStep 4 Remove the single screw located on the bottom of the chassis (on the cha

B-4 Cisco 2500 Series Access Server User GuideUpgrading the Boot PROMsFigure B-2 System Card Layout—Model 2509Upgrading the Boot PROMsTo replace the b

Maintaining the Cisco 2500 Series Access Server B-5Upgrading the Boot PROMsTools and Equipment Required for Replacing the Boot PROMsThe following too

2-2 Cisco 2500 Series Access Server User GuideSafety Recommendations• Wear safety glasses if you are working under any conditions that might be hazard

B-6 Cisco 2500 Series Access Server User GuideUpgrading the Boot PROMsFigure B-3 Extracting and Inserting Boot PROMsStep 4Insert each new boot PROM in

Maintaining the Cisco 2500 Series Access Server B-7Installing Primary-Memory DRAM SIMMsFigure B-4 Orienting the Boot PROMs to the SocketStep 5Replace

B-8 Cisco 2500 Series Access Server User GuideInstalling Primary-Memory DRAM SIMMsTools and Equipment RequiredThe following lists the tools required t

Maintaining the Cisco 2500 Series Access Server B-9Installing Primary-Memory DRAM SIMMsFigure B-5 Removing and Replacing the DRAM SIMMStep 6Using the

B-10 Cisco 2500 Series Access Server User GuideReplacing System-Code SIMMsReplacing System-Code SIMMsThe system code (software) is stored on Flash mem

Maintaining the Cisco 2500 Series Access Server B-11Replacing System-Code SIMMsStep 5 Locate the system-code SIMMs on the system card. The SIMM socke

B-12 Cisco 2500 Series Access Server User GuideClosing the ChassisStep 8 Using the system card orientation shown in Figure B-6, position the new SIMMs

Maintaining the Cisco 2500 Series Access Server B-13Closing the ChassisReplacing the CoverAfter you perform the maintenance for your system, take the

B-14 Cisco 2500 Series Access Server User GuideRecovering a Lost Enable PasswordStep 5 Reinstall the chassis on the wall, rack, desktop, or table.Step

Maintaining the Cisco 2500 Series Access Server B-15Recovering a Lost Enable PasswordNote To recover a lost enable password if Break is disabled on t

Preparing to Install the Cisco 2500 Series Access Server 2-3General Site Requirements• Look carefully for possible hazards in your work area, such as

B-16 Cisco 2500 Series Access Server User GuideRecovering a Lost Enable PasswordStep 9 Press Return. The boot ROM prompt appears as follows:Router>

Maintaining the Cisco 2500 Series Access Server B-17Virtual Configuration Register SettingsVirtual Configuration Register SettingsThe access server ha

B-18 Cisco 2500 Series Access Server User GuideVirtual Configuration Register SettingsChanging Configuration Register SettingsYou might want to modify

Maintaining the Cisco 2500 Series Access Server B-19Virtual Configuration Register SettingsStep 2 At the privileged-level system prompt (access serve

B-20 Cisco 2500 Series Access Server User GuideVirtual Configuration Register SettingsStep 6 Reboot the access server. The new value takes effect. Con

Maintaining the Cisco 2500 Series Access Server B-21Virtual Configuration Register SettingsIn the following example, the virtual configuration registe

B-22 Cisco 2500 Series Access Server User GuideVirtual Configuration Register SettingsBit 8 controls the console Break key. Setting bit 8 (the factory

Maintaining the Cisco 2500 Series Access Server B-23Copying to Flash MemoryBit 13 determines the server response to a bootload failure. Setting bit 1

B-24 Cisco 2500 Series Access Server User GuideCopying to Flash MemoryIP address or name of remote host [255.255.255.255]? server1Name of tftp filenam

APPENDIX Cable Specifications C-1CCable SpecificationsThis appendix provides the following pinout information:• Console Port Pinouts (RJ-45), Table C-1

2-4 Cisco 2500 Series Access Server User GuideGeneral Site RequirementsSite EnvironmentThe location of individual chassis and the layout of your equip

C-2 Cisco 2500 Series Access Server User GuideConsole and Auxiliary Port Signals and PinoutsConsole and Auxiliary Port Signals and PinoutsThe console

Cable Specifications C-3Serial Cable Assemblies and PinoutsSerial Cable Assemblies and PinoutsThe following illustrations and tables provide assembly

C-4 Cisco 2500 Series Access Server User GuideSerial Cable Assemblies and PinoutsFigure C-1 EIA-530 Serial Cable AssemblyTable C-3 EIA-530 DTE Cable P

Cable Specifications C-5Serial Cable Assemblies and PinoutsEIA/TIA-232Figure C-2 shows the EIA/TIA-232 cable assembly; Table C-4 lists the DTE pinout

C-6 Cisco 2500 Series Access Server User GuideSerial Cable Assemblies and PinoutsFigure C-2 EIA/TIA-232 Cable AssemblyTable C-4 EIA/TIA-232 DTE Cable

Cable Specifications C-7Serial Cable Assemblies and PinoutsTable C-5 EIA/TIA-232 DCE Cable Pinout (DB-60 to DB-25)1. Any pin not referenced is not co

C-8 Cisco 2500 Series Access Server User GuideSerial Cable Assemblies and PinoutsEIA/TIA-449Figure C-3 shows the EIA/TIA-449 cable assembly; Table C-6

Cable Specifications C-9Serial Cable Assemblies and PinoutsFigure C-3 EIA/TIA-449 Cable AssemblyTable C-6 EIA/TIA-449 DTE Cable Pinout (DB-60 to DB-3

C-10 Cisco 2500 Series Access Server User GuideSerial Cable Assemblies and PinoutsTable C-7 EIA/TIA-449 DCE Cable Pinout (DB-60 to DB-37)1. Any pin no

Cable Specifications C-11Serial Cable Assemblies and Pinouts1. Any pin not referenced is not connected.J1-24J1-23TxC/RxC+TxC/RxC–Twisted pair no. 9 —

Preparing to Install the Cisco 2500 Series Access Server 2-5General Site Requirements• When mounting a chassis in an open rack, ensure that the rack

C-12 Cisco 2500 Series Access Server User GuideSerial Cable Assemblies and PinoutsV.35Figure C-4 shows the V.35 cable assembly; Table C-8 lists the DT

Cable Specifications C-13Serial Cable Assemblies and Pinouts1. Any pin not referenced is not connected.J1-45ShieldCircuit_GND–Twisted pair no. 12 ––J

C-14 Cisco 2500 Series Access Server User GuideSerial Cable Assemblies and PinoutsTable C-9 V.35 DCE Cable Pinout (DB-60 to 34-Pin)60 Pin1Signal Descr

Cable Specifications C-15Serial Cable Assemblies and PinoutsX.21Figure C-5 shows the X.21 cable assembly; Table C-10 lists the DTE pinout; Table C-11

C-16 Cisco 2500 Series Access Server User GuideSerial Cable Assemblies and PinoutsTable C-11 X.21 DCE Cable Pinout (DB-60 to DB-15)1. Any pin not refe

Cable Specifications C-17Ethernet Cable Assembly and PinoutEthernet Cable Assembly and PinoutFigure C-6 shows an Ethernet (AUI) cable assembly, and T

C-18 Cisco 2500 Series Access Server User GuideToken Ring PinoutToken Ring PinoutTable C-13 lists the pinout for the Token Ring interface port.Table C

Cable Specifications C-19Asynchronous Serial PortsAsynchronous Serial PortsFigure C-7 shows the RJ-45 breakout cable with pinouts for the 68-pin SCSI

C-20 Cisco 2500 Series Access Server User GuideAsynchronous Serial PortsNote The Asynchronous breakout cable is equivalent to a console or auxiliary p

Cable Specifications C-21Asynchronous Serial Ports3 1 CTS 472 DSR 133 RXD 464 RXD GND 125 TXD GND 456 TXD 117 DTR 448 RTS 104 1 CTS 512 DSR 173 RXD 5

2-6 Cisco 2500 Series Access Server User GuideInstallation ChecklistInstallation ChecklistThe Installation Checklist lists the procedures for initial

C-22 Cisco 2500 Series Access Server User GuideAsynchronous Serial Ports6 1 CTS 592 DSR 253 RXD 584 RXD GND 245 TXD GND 576 TXD 237 DTR 568 RTS 227 1

Cable Specifications C-23RJ-45 Adapter PinoutsRJ-45 Adapter PinoutsRefer to Table C-16 for a list of the pins used on the RJ-45-to-DB-25 adapters, us

C-24 Cisco 2500 Series Access Server User GuideRJ-45 Adapter PinoutsTable C-16 Pinouts for the RJ-45-to-DB-25 AdaptersTable C-17 Asynchronous Device C

APPENDIX Translated Safety Warnings D-1DTranslated Safety WarningsThis appendix repeats in multiple languages the warnings in this publication.Warning

D-2 Cisco 2500 Series Access Server User GuideJewelry Removal WarningWarnung Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, d

Translated Safety Warnings D-3Jewelry Removal WarningVaroitus Ennen kuin työskentelet voimavirtajohtoihin kytkettyjen laitteiden parissa, otapois kai

D-4 Cisco 2500 Series Access Server User GuideInstallation WarningInstallation WarningWarning Read the installation instructions before you connect th

Translated Safety Warnings D-5Circuit Breaker (15A) WarningAdvarsel Utstyret er utfomet til bruk med TN-strømsystemer.Aviso O dispositivo foi criado

D-6 Cisco 2500 Series Access Server User GuideSELV Circuit WarningAdvarsel Dette produktet er avhengig av bygningens installasjoner avkortslutningsbes

Translated Safety Warnings D-7SELV Circuit WarningVaroitus Portit, joissa on nimet "Ethernet", "10BaseT", "Token Ring",

Preparing to Install the Cisco 2500 Series Access Server 2-7Creating a Site LogCreating a Site LogThe Site Log provides a record of all actions relev

D-8 Cisco 2500 Series Access Server User GuidePower Supply Disconnection Warning¡Atención! Los puertos "Ethernet", "10BaseT", &quo

Translated Safety Warnings D-9Power Supply Disconnection WarningAdvarsel Før det utføres arbeid på kabinettet eller det arbeides i nærheten avstrømfo

D-10 Cisco 2500 Series Access Server User GuidePower Supply Disconnection WarningAttention Ne pas toucher le bloc d'alimentation quand le cordon

Translated Safety Warnings D-11Lightning Activity WarningLightning Activity WarningWarning Do not work on the system or connect or disconnect cables

D-12 Cisco 2500 Series Access Server User GuideLightning Activity Warning

2-8 Cisco 2500 Series Access Server User GuideCabling ConsiderationsDistance LimitationsFollowing are the distance limitation specifications for Ethern

Preparing to Install the Cisco 2500 Series Access Server 2-9Console and Auxiliary Port ConsiderationsThe use of balanced drivers allows EIA/TIA-449 s

xviii Cisco 2500 Series Access Server User GuideDocument OrganizationDocument OrganizationThe major sections of this user guide are as follows:• Chapt

2-10 Cisco 2500 Series Access Server User GuideNetwork Connection ConsiderationsConsole Port ConnectionsEach access server system includes an EIA/TIA-

Preparing to Install the Cisco 2500 Series Access Server 2-11Network Connection ConsiderationsYou can use the following equipment to connect to the E

2-12 Cisco 2500 Series Access Server User GuideInspecting the SystemNote Because of the small size of the pins on the DB-60 serial connector, attempti

Preparing to Install the Cisco 2500 Series Access Server 2-13Inspecting the System• Warranty pack• UniverCD and optional printed publications, as spe

2-14 Cisco 2500 Series Access Server User GuideInspecting the System

CHAPTER Installing the Cisco 2500 Series Access Server 3-1Installing the Cisco 2500 SeriesAccess Server3This chapter guides you through the installati

3-2 Cisco 2500 Series Access Server User GuideRequired Tools and PartsRequired Tools and PartsFollowing are the tools and parts required to install th

Installing the Cisco 2500 Series Access Server 3-3Installing the Rubber FeetInstalling the Rubber FeetThis section explains how to install the rubber

3-4 Cisco 2500 Series Access Server User GuideRack-Mounting the ChassisFigure 3-2 Installing the Rubber FeetRack-Mounting the ChassisDepending on the

Installing the Cisco 2500 Series Access Server 3-5Rack-Mounting the Chassis19-Inch RackTo install the chassis in a 19-inch rack with the front panel

About This Guide xixDocument ConventionsDocument ConventionsThis publication uses the following conventions to convey instructions and information:Co

3-6 Cisco 2500 Series Access Server User GuideRack-Mounting the ChassisTelco RackTo install the chassis in a 19-inch, center-mount telco rack, attach

Installing the Cisco 2500 Series Access Server 3-7Wall-Mounting the ChassisWall-Mounting the ChassisFollowing is the procedure for wall-mounting the

3-8 Cisco 2500 Series Access Server User GuideWall-Mounting the ChassisFigure 3-8 Wall-Mounting the ChassisH1718Vertical wall studPower supply and fan

Installing the Cisco 2500 Series Access Server 3-9Connecting to the NetworkConnecting to the NetworkTake the following steps to connect the access se

3-10 Cisco 2500 Series Access Server User GuideConnecting to the NetworkFigure 3-10 Connecting Token Ring Cables H3543Standard IEEE 802.5connectorDB-9

Installing the Cisco 2500 Series Access Server 3-11Connecting to the NetworkStep 2 Connect the synchronous serial ports to the modem or CSU/DSU, as s

3-12 Cisco 2500 Series Access Server User GuideConnecting to the NetworkStep 3 Connect the asynchronous breakout cable to one of the 68-pin ports, and

Installing the Cisco 2500 Series Access Server 3-13Connecting the Console Terminal and ModemConnecting the Console Terminal and ModemThe console term

3-14 Cisco 2500 Series Access Server User GuideConnecting the Console Terminal and ModemFigure 3-13 Identifying a Roll-Over CableAdditional informatio

Installing the Cisco 2500 Series Access Server 3-15Connecting the Console Terminal and ModemFigure 3-14 Connecting the Console TerminalStep 2Your ter

xx Cisco 2500 Series Access Server User GuideDocument ConventionsWarning This warning symbol means danger. You are in a situation that could causebodi

3-16 Cisco 2500 Series Access Server User GuideWhat to Do after Installing the Access Server HardwareConnecting a Modem to the Auxiliary PortThis sect

CHAPTER Configuring the Cisco 2500 Series Access Server 4-1Configuring the Cisco 2500Series Access Server4This chapter describes the procedures for con

4-2 Cisco 2500 Series Access Server User GuideIf You Need More InformationAdditional PublicationsFor more information on configuring the Cisco 2500 ser

Configuring the Cisco 2500 Series Access Server 4-3If You Need More InformationAvailable 24 hours a day, 7 days a week, CIO provides a wealth of stan

4-4 Cisco 2500 Series Access Server User GuideBooting the Access Server for the First Time• Software version level and hardware configuration (enter th

Configuring the Cisco 2500 Series Access Server 4-5Configuring the Access ServerThere are two commands you can use to do this, depending on the relea

4-6 Cisco 2500 Series Access Server User GuideConfiguring the Access ServerNote You will need to acquire the correct network addresses from your syste

Configuring the Cisco 2500 Series Access Server 4-7Configuring the Access ServerYou can now enter any changes to the configuration that are desired. P

4-8 Cisco 2500 Series Access Server User GuideConfiguring the Access ServerThis functionality is coordinated by your system administrator at the site

Configuring the Cisco 2500 Series Access Server 4-9Configuring the Access ServerOnce the access server has determined that AutoInstall is not configur

CHAPTER Overview of the Cisco 2500 Series Access Server 1-1Overview of the Cisco 2500Series Access Server1The Cisco 2500 series access server is a ful

4-10 Cisco 2500 Series Access Server User GuideConfiguring the Access Server cisco Systems, Inc. 170 West Tasman Drive S

Configuring the Cisco 2500 Series Access Server 4-11Configuring the Access ServerInterface IP-Address OK? Method Status ProtocolEthernet

4-12 Cisco 2500 Series Access Server User GuideConfiguring the Access ServerStep 7 In most cases you will use IP routing. If you are using IP routing,

Configuring the Cisco 2500 Series Access Server 4-13Configuring the Access ServerStep 2 Set the line speed and the flow control for the asynchronous l

4-14 Cisco 2500 Series Access Server User GuideConfiguring the Access ServerStep 6 Enter yes if you will be using IPX on your asynchronous lines, In t

Configuring the Cisco 2500 Series Access Server 4-15Configuring the Access ServerStep 3 Determine if you are going to enable IPX on this interface, e

4-16 Cisco 2500 Series Access Server User GuideConfiguring the Access ServerConfigure IP unnumbered on this interface? [no]: yes IP address for thi

Configuring the Cisco 2500 Series Access Server 4-17Configuring the Access ServerConfiguring interface Async6: Default client IP address for this

4-18 Cisco 2500 Series Access Server User GuideConfiguring the Access ServerTo store the configuration or changes to your startup configuration, enter a

APPENDIX Internetworking Primer A-1AInternetworking PrimerThis appendix gives an introduction to the technologies used in internetworking. It alsoincl

1-2 Cisco 2500 Series Access Server User GuideAccess Server Hardware FeaturesAccess Server Hardware FeaturesThe access server has the following hardwa

A-2 Cisco 2500 Series Access Server User GuideCisco Internetwork Operating SystemNote To order UniverCD, Cisco’s technical documentation in CD-ROM for

Internetworking Primer A-3Cisco Internetwork Operating SystemThe show version command displays the capacity of each kind of memory.Proper operation o

A-4 Cisco 2500 Series Access Server User GuideCisco Internetwork Operating SystemThe configuration register can be used by system administrators to con

Internetworking Primer A-5Cisco Internetwork Operating SystemCisco IOSNormal operation of your access server requires the Cisco IOS image to be store

A-6 Cisco 2500 Series Access Server User GuideCisco Internetwork Operating SystemEXEC ModesThe command interpreter of Cisco IOS software is called the

Internetworking Primer A-7Cisco Internetwork Operating Systemsection “Using the Enable Secret and the Enable Password,” in the chapter “Configuring th

A-8 Cisco 2500 Series Access Server User GuideCisco Internetwork Operating SystemSetup ModeYou use the setup facility of Cisco IOS software to streaml

Internetworking Primer A-9LANs and WANsThe interaction of the configuration commands is illustrated in Figure A-1.Figure A-1 Configuration Command Inte

A-10 Cisco 2500 Series Access Server User GuideLANs and WANsEach layer of the OSI reference model specifies particular network functions such asaddress

Internetworking Primer A-11LANs and WANsFor example, the IEEE standard 802.3 (Ethernet) defines the physical layer (connectors,voltages, and binary lo

Overview of the Cisco 2500 Series Access Server 1-3Access Server ServicesFigure 1-1 Cisco 2500 Series Access Server (Model 2511 Shown)Access Server S

A-12 Cisco 2500 Series Access Server User GuideLANs and WANsEthernet LANsThe IEEE has established Ethernet as standard 802.3. Ethernet uses a 10-Mbps

Internetworking Primer A-13LANs and WANsConfiguring Token RingThe only option you must configure Token Ring interfaces is the ring speed. The following

A-14 Cisco 2500 Series Access Server User GuideLANs and WANsIn addition to data link layer addressing, network protocols (Layer 3) were developed toal

Internetworking Primer A-15LANs and WANsFigure A-4 A Typical WAN ArchitectureWAN Physical Layer (Layer 1)Most WANs require an interconnection that is

A-16 Cisco 2500 Series Access Server User GuideLANs and WANsNote The cable used on the access server port will configure the port as DTE or DCE. Ifit i

Internetworking Primer A-17LANs and WANsPoint-to-Point WANsPoint-to-point WANs only allow two endnodes on the WAN connection (as shown inFigure A-6).

A-18 Cisco 2500 Series Access Server User GuideLANs and WANsPoint-to-Point ProtocolPPP encapsulation provides Cisco IOS software to devices that are n

Internetworking Primer A-19LANs and WANsFigure A-7 Multipoint WANFrame RelayFrame Relay is a packet-switching data communications technology that can

A-20 Cisco 2500 Series Access Server User GuideDesktop ProtocolsFrame Relay WANs should be carefully designed with the above considerations in mind.(s

Internetworking Primer A-21Desktop ProtocolsRouted Protocol Design GoalsEach of these three desktop protocols was designed with a common set of goals

1-4 Cisco 2500 Series Access Server User GuideSystem SpecificationsTerminal ServicesTerminal services provide terminal-to-host connectivity with virtu

A-22 Cisco 2500 Series Access Server User GuideDesktop ProtocolsFigure A-8 Network Numbering Plan for IP, IPX, and AppleTalkNode Addressing and Data L

Internetworking Primer A-23Desktop ProtocolsThe ARP (or AARP) address mapping process is illustrated in Figure A-9 and works asfollows:1 A node needs

A-24 Cisco 2500 Series Access Server User GuideDesktop ProtocolsThe function of the routing protocol is to build a complete routing table in each acce

Internetworking Primer A-25Desktop ProtocolsDesign and administration of an IP network requires an understanding of IP subnetting.Review the document

A-26 Cisco 2500 Series Access Server User GuideDesktop ProtocolsFigure A-11 IP Subnetting PlanIP Node NumberingIP uses the bits to the right of the su

Internetworking Primer A-27Desktop ProtocolsThe IP routing protocol options are as follows:• Routing Information Protocol (RIP)• Interior Gateway Rou

A-28 Cisco 2500 Series Access Server User GuideDesktop ProtocolsBecause Router D and Router C share a data link, they must agree on the IP network and

Internetworking Primer A-29Desktop ProtocolsFigure A-12 IPX Network Numbering PlanIPX Node NumberingIPX uses a 48-bit address for the node. The IPX d

A-30 Cisco 2500 Series Access Server User GuideDesktop ProtocolsIPX Directory ServicesNovell servers advertise their presence throughout the IPX inter

Internetworking Primer A-31Desktop ProtocolsFor Novell NetWare 3.x and earlier versions, the default encapsulation was Ethernet_II. Asof Netware 4.x,

Overview of the Cisco 2500 Series Access Server 1-5System Specifications1. BTU = British thermal unit.2. NRZ = nonreturn to zero; NRZI = nonreturn to

A-32 Cisco 2500 Series Access Server User GuideDesktop ProtocolsAppleTalk Network NumberingAppleTalk uses a 16-bit number to uniquely identify network

Internetworking Primer A-33Desktop ProtocolsFigure A-13 AppleTalk Numbering and Zone Naming PlanAppleTalk Node NumberingThe AppleTalk node address is

A-34 Cisco 2500 Series Access Server User GuideDesktop ProtocolsAppleTalk Routing ProtocolsSeveral AppleTalk routing protocols are available, includin

Internetworking Primer A-35Desktop ProtocolsIn order to configure AppleTalk correctly, all AppleTalk access server or router interfaceson a data link

A-36 Cisco 2500 Series Access Server User GuideDesktop ProtocolsEnter the command show apple zone to look at the zone information table of the accesss

Internetworking Primer A-37ModemsModemsModems are used with access servers to allow remote nodes and remote LANs to connectto internetworks across Pu

A-38 Cisco 2500 Series Access Server User GuideModemsRJ-45 CablingThe access server uses high-density, 68-pin connectors with an 8-connector breakout

Internetworking Primer A-39ModemsBoth the access server and the modem must be configured for correct operation on each ofthe pairs of wires. Understan

A-40 Cisco 2500 Series Access Server User GuideModemsHardware Flow Control (RTS/CTS)Hardware flow control is used between the access server and the mod

Internetworking Primer A-41ModemsConfiguring the LineThe goal of line configuration is to prepare the line to test dial-in access to an EXECsession. In