Avaya Configuring IP Utilities Uživatelský manuál Strana 1

Part No. 304234-A Rev 00November 1998BayRS Version 13.10Site Manager Software Version 7.10 BCC Version 4.10 Configuring IP Utilities

x304234-A Rev 00TFTP Parameters ... A-7Telnet

Configuring IP Utilities6-10304234-A Rev 00Changing the Telnet Login PromptYou can change the Telnet login prompt on the Telnet console screen by spec

Customizing Telnet Services304234-A Rev 006-11 Changing the Login TimeoutYou can specify a value that will determine the number of minutes that can el

Configuring IP Utilities6-12304234-A Rev 00Changing the Password TimeoutBy changing the password timeout value you can determine the number of minutes

Customizing Telnet Services304234-A Rev 006-13 Changing the Command TimeoutBy changing the command timeout you determine the number of minutes that ca

Configuring IP Utilities6-14304234-A Rev 00Using Site ManagerComplete the tasks in the following table to specify the number of minutes that can elaps

Customizing Telnet Services304234-A Rev 006-15 Using Site ManagerComplete the tasks in the following table to specify the number of login attempts all

Configuring IP Utilities6-16304234-A Rev 00To enable the Technician Interface to display a report showing a record of all processing operations, compl

Customizing Telnet Services304234-A Rev 006-17 Enabling Diagnostic Network DataThis parameter allows you to specify whether you want the Technician In

Configuring IP Utilities6-18304234-A Rev 00Enabling Diagnostic PTY DataTo specify whether you want the Technician Interface to display pseudo-terminal

Customizing Telnet Services304234-A Rev 006-19 Changing the History FileYou can determine the maximum number of commands you want stored in the local

304234-A Rev 00xiAppendix D Configuring IP Global Access PoliciesCreating and Naming the Policy ...

Configuring IP Utilities6-20304234-A Rev 00Configuring a Telnet Client on the Router After you start a Telnet client on the router for outbound Telnet

Customizing Telnet Services304234-A Rev 006-21 Using Site ManagerComplete the tasks in the following table to enable or disable a Telnet client on an

Configuring IP Utilities6-22304234-A Rev 00To disable verbose debug logging, navigate to the client-specific prompt and enter:client# debug-log-flag o

Customizing Telnet Services304234-A Rev 006-23 For example, the following command line changes the Telnet server’s TCP remote port number to 20:client

Configuring IP Utilities6-24304234-A Rev 00For example, the following command line changes the default command prompt to system1:client# prompt system

304234-A Rev 007-1 Chapter 7Customizing NTP ServicesThis chapter describes how to customize NTP services on the router. It assumes you have configured

Configuring IP Utilities7-2304234-A Rev 00Configuring NTP Using the BCC or Site ManagerTable 7-1 lists the NTP configuration tasks described in this c

Customizing NTP Services304234-A Rev 007-3 For example, the following command line reenables NTP on the router:ntp# enablentp#Using Site ManagerTo dis

Configuring IP Utilities7-4304234-A Rev 00To specify the mode in which you want NTP to run on the router, complete the tasks in the following table.Si

Customizing NTP Services304234-A Rev 007-5 Configuring Remote Time Servers You configure remote time servers (peers) for time synchronization in unica

Configuring IP Utilities7-6304234-A Rev 00Using the BCCTo specify the IP address of each peer that you want to add to the router, navigate to the NTP

Customizing NTP Services304234-A Rev 007-7 Setting the Mode for a Remote Time ServerYou can specify the mode in which a remote time server operates on

Configuring IP Utilities7-8304234-A Rev 00Setting Local Host ModeLocal Host Mode indicates the mode of operation of the local NTP client. By default,

Customizing NTP Services304234-A Rev 007-9 Specifying the Source IP AddressThe source IP address allows you to specify a single IP address that NTP us

Configuring IP Utilities7-10304234-A Rev 00Using Site ManagerTo specify the source IP address of a remote time server, complete the tasks in the follo

Customizing NTP Services304234-A Rev 007-11 Complete the tasks in the following table to specify whether the local NTP client will prefer or reject NT

Configuring IP Utilities7-12304234-A Rev 00Deleting Remote Time Servers from a RouterWhen you delete a remote time server (peer), NTP deletes the IP a

Customizing NTP Services304234-A Rev 007-13 Configuring NTP Access Control The access control feature allows you to selectively restrict NTP clients f

Configuring IP Utilities7-14304234-A Rev 00Specifying a Filter Type and IP Subnet MaskThe NTP filter type parameter allows you to specify whether to d

Customizing NTP Services304234-A Rev 007-15 Deleting Access for a Time ServerWhen you delete access for a remote time server (peer), Site Manager remo

304234-A Rev 00xiiiFiguresFigure 2-1. TCP Between IP and Clients ...2-6Figure 2-2. FT

304234-A Rev 008-1 Chapter 8Customizing NetBIOS over IPThis chapter describes how to customize NetBIOS over IP services on the router. It assumes you

Configuring IP Utilities8-2304234-A Rev 00Disabling and Reenabling NetBIOSWhen you start NetBIOS on the router, NetBIOS is automatically enabled.To di

Customizing NetBIOS over IP304234-A Rev 008-3 Enabling the Insertion of Record Route OptionThe Insertion of Record Route option prevents rebroadcast p

Configuring IP Utilities8-4304234-A Rev 00Configuring a NetBIOS CacheNetBIOS is a broadcast-intensive protocol. Much of the broadcast overhead is rela

Customizing NetBIOS over IP304234-A Rev 008-5 By default, NetBIOS treats a name as a 16-character entity. You can use Site Manager to enable the featu

Configuring IP Utilities8-6304234-A Rev 00Creating a MIB Instance for a Cached NameBy default, NetBIOS creates a MIB instance for each name entry stor

Customizing NetBIOS over IP304234-A Rev 008-7 Specifying the Size of the Name CacheBy default, NetBIOS allocates space for 100 entries in the name cac

Configuring IP Utilities8-8304234-A Rev 00By default, inactive NetBIOS names expire from the NetBIOS name cache after 300 seconds.You can use Site Man

Customizing NetBIOS over IP304234-A Rev 008-9 For networks that actively use up to 2500 NetBIOS server names, use the default value (253). To determin

Configuring IP Utilities8-10304234-A Rev 00Customizing NetBIOS on an IP InterfaceNetBIOS software on the router communicates with NetBIOS clients and

Customizing NetBIOS over IP304234-A Rev 008-11 You can use Site Manager to disable or reenable this interface for caching the name of each NetBIOS ser

Configuring IP Utilities8-12304234-A Rev 00Supplying a Rebroadcast AddressBy default, NetBIOS uses the IP broadcast address configured for this interf

Customizing NetBIOS over IP304234-A Rev 008-13 Configuring a Static NetBIOS Name and AddressYou can add static NetBIOS names to the router. These entr

Configuring IP Utilities8-14304234-A Rev 00Disabling and Reenabling Static Name CachingBy default, NetBIOS caches the names you added statically. You

Customizing NetBIOS over IP304234-A Rev 008-15 Site Manager ProcedureYou do this System responds1. In the Configuration Manager window, choose Circuit

304234-A Rev 009-1 Chapter 9Customizing the DNS ClientWhen you create the DNS client, default values are in effect for all parameters. You may want to

Configuring IP Utilities9-2304234-A Rev 00For example, the following command line disables the DNS client on the router.dns# disabledns#To reenable th

Customizing the DNS Client304234-A Rev 009-3 Modifying the DNS Client ConfigurationYou can modify how the router makes requests to the DNS server, for

304234-A Rev 00xvTablesTable 2-1. TCP Reliability Features ...2-3Table 2-2. TC

Configuring IP Utilities9-4304234-A Rev 00For example, the following commands change how the router sends DNS requests:dns# time-out 10dns# max-retran

Customizing the DNS Client304234-A Rev 009-5 Disabling the Recursion BitIf the first DNS server that the router contacts does not have the requested i

Configuring IP Utilities9-6304234-A Rev 00Modifying How the DNS Client Handles Server ResponsesYou can specify whether the router accepts the DNS serv

Customizing the DNS Client304234-A Rev 009-7 Modifying the DNS Server ListThe DNS server list contains the DNS servers (up to a maximum of three) that

Configuring IP Utilities9-8304234-A Rev 00address is the IP address of the DNS server whose number you specified.To see the IP address and port number

Customizing the DNS Client304234-A Rev 009-9 Adding Entries to the DNS Server ListYou can add entries, up to a maximum of three, to the DNS server lis

Configuring IP Utilities9-10304234-A Rev 00Deleting Entries from the DNS Server ListYou can delete an entry from the DNS server list using either the

Customizing the DNS Client304234-A Rev 009-11 Disabling or Reenabling DNS on the RouterYou can disable or reenable DNS client services on the router u

Configuring IP Utilities9-12304234-A Rev 00Using Site ManagerTo disable or reenable DNS client services from all circuits on the router, complete the

Customizing the DNS Client304234-A Rev 009-13 Using Site ManagerTo delete DNS client services from the router, complete the following tasks:Site Manag

304234-A Rev 0010-1 Chapter 10Customizing the DNS ProxyWhen you create the DNS proxy, default values are in effect for all parameters. You can change

Configuring IP Utilities10-2304234-A Rev 005. Edit one or more of the following parameters:• Enable/Disable• Proxy Mode• Proxy Listen Port Number• DNS

304234-A Rev 00A-1 Appendix ASite Manager ParametersThis appendix contains the Site Manager parameter descriptions for TCP, FTP, TFTP, Telnet, NTP, DN

Configuring IP UtilitiesA-2304234-A Rev 00TCP Global ParametersUse the following guidelines to configure TCP global parameters in the Configuration Ma

Site Manager Parameters304234-A Rev 00A-3 Parameter: Max. Retransmission Timeout (msec.)Path: Configuration Manager > Protocols > Global Protoco

Configuring IP UtilitiesA-4304234-A Rev 00FTP Global ParametersUse the following guidelines to configure the parameters in the Edit FTP Global Paramet

Site Manager Parameters304234-A Rev 00A-5 Parameter: Idle Time Out (secs)Path: Configuration Manager > Protocols > Global Protocols > FTP >

Configuring IP UtilitiesA-6304234-A Rev 00Parameter: Control ConnectionPath: Configuration Manager > Protocols > Global Protocols > FTP >

Site Manager Parameters304234-A Rev 00A-7 TFTP ParametersUse the following guidelines to configure the parameters in the Edit TFTP Parameters window.P

304234-A Rev 00xvii PrefaceIP utilities are application protocols that use the Internet Protocol (IP) for message transport. This guide describes the

Configuring IP UtilitiesA-8304234-A Rev 00Telnet Server Global ParametersUse the following guidelines to configure the Telnet server global parameters

Site Manager Parameters304234-A Rev 00A-9 Parameter: TI Lines per ScreenPath: Configuration Manager > Protocols > Global Protocols > Telnet S

Configuring IP UtilitiesA-10304234-A Rev 00Parameter: TI PromptPath: Configuration Manager > Protocols > Global Protocols > Telnet Server >

Site Manager Parameters304234-A Rev 00A-11 Parameter: Command Timeout (min.)Path: Configuration Manager > Protocols > Global Protocols > Teln

Configuring IP UtilitiesA-12304234-A Rev 00Parameter: Diagnostic ExercisePath: Configuration Manager > Protocols > Global Protocols > Telnet

Site Manager Parameters304234-A Rev 00A-13 Parameter: Diagnostic OptionsPath: Configuration Manager > Protocols > Global Protocols > Telnet S

Configuring IP UtilitiesA-14304234-A Rev 00Parameter: Force User LogoutPath: Configuration Manager > Protocols > Global Protocols > Telnet Se

Site Manager Parameters304234-A Rev 00A-15 Telnet Client Global ParametersUse the following guidelines to configure the parameters in the Edit Telnet

Configuring IP UtilitiesA-16304234-A Rev 00NTP ParametersUse the following guidelines to configure NTP parameters.Parameter: Remote PortPath: Configur

Site Manager Parameters304234-A Rev 00A-17 Parameter: ModePath: Configuration Manager > Protocols > Global Protocols > NTP > GlobalDefault

Configuring IP Utilitiesxviii304234-A Rev 00Text ConventionsThis guide uses the following text conventions:angle brackets (< >) Indicate that yo

Configuring IP UtilitiesA-18304234-A Rev 00Parameter: Filter TypePath: Configuration Manager > Protocols > Global Protocols > NTP > Access

Site Manager Parameters304234-A Rev 00A-19 Parameter: Local Host ModePath: Configuration Manager > Protocols > Global Protocols > NTP > Pe

Configuring IP UtilitiesA-20304234-A Rev 00NetBIOS Global ParametersUse the following guidelines to configure the parameters in the Edit NetBIOS/IP Gl

Site Manager Parameters304234-A Rev 00A-21 Parameter: NetBIOS Name CachingPath: Configuration Manager > Protocols > IP > NetBIOS > GlobalD

Configuring IP UtilitiesA-22304234-A Rev 00Parameter: Max Name Cache EntriesPath: Configuration Manager > Protocols > IP > NetBIOS > Globa

Site Manager Parameters304234-A Rev 00A-23 Parameter: Hash Entry CountPath: Configuration Manager > Protocols > IP > NetBIOS > GlobalDefau

Configuring IP UtilitiesA-24304234-A Rev 00NetBIOS/IP Interface Table ParametersUse the following guidelines to configure the parameters in the NetBIO

Site Manager Parameters304234-A Rev 00A-25 Parameter: NetBIOS Name CachingPath: Configuration Manager > Protocols > IP > NetBIOS > Interfa

Configuring IP UtilitiesA-26304234-A Rev 00NetBIOS/IP Static Entry Table ParametersUse the following guidelines to configure the parameters in the Net

Site Manager Parameters304234-A Rev 00A-27 Parameter: NetBIOS Station NamePath: Configuration Manager > Protocols > IP > NetBIOS > Static

Preface304234-A Rev 00xix italic text Indicates file and directory names, new terms, book titles, and variables in command syntax descriptions. Where

Configuring IP UtilitiesA-28304234-A Rev 00DNS Global ParametersThe Edit DNS Global Parameters window contains the global DNS parameters for the DNS c

Site Manager Parameters304234-A Rev 00A-29 Parameter: Max Outstanding QueryPath: Configuration Manager > Protocols > Global Protocols > DNS &

Configuring IP UtilitiesA-30304234-A Rev 00Parameter: Domain NamePath: Configuration Manager > Protocols > Global Protocols > DNS > Global

Site Manager Parameters304234-A Rev 00A-31 Parameter: Ignore Truncation ErrorPath: Configuration Manager > Protocols > Global Protocols > DNS

Configuring IP UtilitiesA-32304234-A Rev 00DNS Server Record ParametersThe DNS Server Record window contains the parameters that specify the approved

Site Manager Parameters304234-A Rev 00A-33 DNS Proxy Server ParametersAs with the DNS global parameters, you first define a record for a DNS proxy ser

Configuring IP UtilitiesA-34304234-A Rev 00Parameter: Proxy ModePath: Configuration Manager > Protocols > Global Protocols > DNS > DNS Pro

Site Manager Parameters304234-A Rev 00A-35 Parameter: DNS Server 2Path: Configuration Manager > Protocols > Global Protocols > DNS > DNS P

Configuring IP UtilitiesA-36304234-A Rev 00Parameter: Timeout (in seconds)Path: Configuration Manager > Protocols > Global Protocols > DNS &g

Site Manager Parameters304234-A Rev 00A-37 Parameter: Max. Outstanding Req.Path: Configuration Manager > Protocols > Global Protocols > DNS &

ii 304234-A Rev 004401 Great America Parkway 8 Federal StreetSanta Clara, CA 95054 Billerica, MA 01821Copyright © 1998 Bay Networks, Inc.All rights re

Configuring IP Utilitiesxx304234-A Rev 00AcronymsARP Address Resolution ProtocolATM asynchronous transfer modeBGP Border Gateway ProtocolDARPA Defense

Configuring IP UtilitiesA-38304234-A Rev 00DNS Proxy Server ParametersThe DNS Proxy Server List window contains the DNS parameters for the DNS proxy o

Site Manager Parameters304234-A Rev 00A-39 Parameter: Proxy Listen Port NumberPath: Configuration Manager > Protocols > Global Protocols > DN

Configuring IP UtilitiesA-40304234-A Rev 00Parameter: DNS Server 3Path: Configuration Manager > Protocols > Global Protocols > DNS > DNS P

Site Manager Parameters304234-A Rev 00A-41 Parameter: Max. RetransmissionsPath: Configuration Manager > Protocols > Global Protocols > DNS &g

Configuring IP UtilitiesA-42304234-A Rev 00IP Accounting ParametersUse the following guidelines to configure the IP accounting parameters in the Edit

Site Manager Parameters304234-A Rev 00A-43 Parameter: ThresholdPath: Configuration Manager > Protocols > IP > GlobalDefault: 512Options: 1 to

Site Manager Default Settings304234-A Rev 00B-1 Appendix BSite Manager Default SettingsThis appendix lists the Site Manager default settings for TCP,

Configuring IP UtilitiesB-2304234-A Rev 00FTP Parameters Table B-2 lists the Site Manager default parameter settings for FTP.TFTP ParametersTable B-3

Site Manager Default Settings304234-A Rev 00B-3 Telnet ParametersTable B-4 lists the Site Manager default parameter settings for Telnet configuration.

Preface304234-A Rev 00xxi Bay Networks Technical PublicationsYou can now print Bay Networks technical manuals and release notes free, directly from th

Configuring IP UtilitiesB-4304234-A Rev 00Table B-6 lists the Site Manager default parameter settings for a Telnet client.NTP Parameters Table B-7 lis

Site Manager Default Settings304234-A Rev 00B-5 NetBIOS over IP ParametersTable B-8 lists the Site Manager default settings for NetBIOS/IP global para

Configuring IP UtilitiesB-6304234-A Rev 00Table B-10 lists the Site Manager default settings for NetBIOS/IP static entry table parameters.IP Accountin

Site Manager Default Settings304234-A Rev 00B-7 DNS Server ParametersTable B-13 lists the Site Manager default parameter settings for the DNS server.

Configuring IP UtilitiesB-8304234-A Rev 00Trunc. Max. Allowed 1Cache Size 20Table B-14. DNS Proxy Server Parameters (continued)Parameter Default

304234-A Rev 00C-1 Appendix CConfiguring IP Accounting ona Frame Relay InterfaceIP accounting is a mechanism for counting transit data packets -- that

Configuring IP UtilitiesC-2304234-A Rev 00Enabling IP Accounting on the RouterBy default, IP accounting support is disabled on the router. You can use

Configuring IP Accounting on a Frame Relay Interface304234-A Rev 00C-3 Controlling Notification of a Full IP Accounting TableBy default, IP accounting

Configuring IP UtilitiesC-4304234-A Rev 00IP accounting maintains two aging counters, one for the accounting table and one for the checkpoint table. W

304234-A Rev 00D-1 Appendix DConfiguring IP Global Access PoliciesUsing the BCC, you can create global IP access policies that permit or deny access t

Configuring IP UtilitiesD-2304234-A Rev 00Creating and Naming the Policy To create an IP global access policy and assign the policy a unique name, nav

Configuring IP Global Access Policies304234-A Rev 00D-3 You are now in the context of the IP address for the policy. To return to the policy-specify p

Configuring IP UtilitiesD-4304234-A Rev 00For example, the following command allows access to the service specified for policy_1:access-policy/policy_

Configuring IP Global Access Policies304234-A Rev 00D-5 For example, the following command specifies FTP as the IP utility controlled by policy_1:acce

304234-A Rev 00Index-1Symbols15-Character NetBIOS Name Caching parameter, 8-5, A-21Aacronyms, xxadding NetBIOS over IP to an interface, 1-12Answer Tru

Index-2304234-A Rev 00Enable parameterDNS, A-28IP accounting, C-2NetBIOS static entry, 8-14, A-26TFTP, A-7Enable/Disable parameterFTP, A-4NetBIOS glob

304234-A Rev 00Index-3customizing a cache search, 8-8defaults, B-5enabling and disabling, 8-2, 8-10inbound and outbound broadcasts, 8-11name caching,

Index-4304234-A Rev 00Telnet Server Global parametersCommand Timeout, A-11Diagnostic Network Data, A-12Diagnostic Options, A-13Diagnostic Report, A-11

304234-A Rev 001-1 Chapter 1Starting IP UtilitiesThis chapter describes how to create a basic TCP, FTP, TFTP, Telnet, NTP, DNS, or NetBIOS over IP con

Configuring IP Utilities1-2304234-A Rev 00Starting Configuration ToolsBefore configuring TCP, FTP, TFTP, Telnet, NTP, DNS, and NetBIOS over IP service

Starting IP Utilities304234-A Rev 001-3 Using the BCCTo start IP on the router: 1. Configure a physical interface on an available slot/connector.2. Co

Configuring IP Utilities1-4304234-A Rev 00Step 2: Configuring an IP InterfaceTo configure an IP interface on a physical interface, navigate to the pro

Starting IP Utilities304234-A Rev 001-5 min-rto 250 max-rto 240000 max-win 4096tcp#Using Site ManagerYou can easily start TCP services using de

Configuring IP Utilities1-6304234-A Rev 00Using the BCCTo start FTP on the router with default settings, begin in configuration mode at the box-level

Starting IP Utilities304234-A Rev 001-7 Starting TFTP ServicesYou can use the BCC command line interface or the Site Manager graphical user interface

304234-A Rev 00 iiiBay Networks, Inc. Software License AgreementNOTICE: Please carefully read this license agreement before copying or using the acco

Configuring IP Utilities1-8304234-A Rev 00To start TFTP services, perform the following actions:By default, the default volume is set to 2.Starting Te

Starting IP Utilities304234-A Rev 001-9 3.Display Telnet server default settings.server# infoon telnet state enabled manager-script automgr.bat

Configuring IP Utilities1-10304234-A Rev 00To start a Telnet server, perform the following actions:To start a Telnet client, perform the following act

Starting IP Utilities304234-A Rev 001-11 To do this, you must ping the IP address of the time server you want to configure. If the server you want to

Configuring IP Utilities1-12304234-A Rev 00Starting NetBIOS over IPYou can easily start NetBIOS over IP and configure it on a circuit using Site Manag

Starting IP Utilities304234-A Rev 001-13 Starting the DNS ClientTo create the DNS client, first configure an IP interface, as described in “Configurin

Configuring IP Utilities1-14304234-A Rev 00After you create and enable the DNS client, you must specify at least one DNS server. You can specify up to

Starting IP Utilities304234-A Rev 001-15 Starting the DNS Proxy ServerTo create the DNS proxy server, first configure an IP interface. You must specif

304234-A Rev 002-1 Chapter 2Overview of IP UtilitiesThis chapter describes the concepts behind TCP, FTP, TFTP, Telnet, NTP, DNS, and NetBIOS over IP s

iv 304234-A Rev 00its own data and information and for maintaining adequate procedures apart from the Software to reconstruct lost or altered files,

Configuring IP Utilities2-2304234-A Rev 00The Bay Networks implementation of TCP generally ensures good terminal server performance on slow-speed as w

Overview of IP Utilities304234-A Rev 002-3 TCP FeaturesBecause IP does not always guarantee reliable transfer of data, TCP implements several reliabil

Configuring IP Utilities2-4304234-A Rev 00Connection TypesTCP is a connection-oriented protocol that requires application programs at both ends of a c

Overview of IP Utilities304234-A Rev 002-5 TCP Memory ConsiderationsThe Transmission Control Protocol requires a significant amount of memory to:• Ret

Configuring IP Utilities2-6304234-A Rev 00The value you set for the maximum window size depends on how much memory you need for services other than TC

Overview of IP Utilities304234-A Rev 002-7 The interface between TCP and programs that use TCP consists of a set of messages exchanged between the cli

Configuring IP Utilities2-8304234-A Rev 00How FTP WorksThe FTP client initiates an FTP session with the FTP server on the router. The session establis

Overview of IP Utilities304234-A Rev 002-9 Table 2-3 describes the FTP commands that the FTP server supports on Bay Networks routers.Table 2-3. FTP Co

Configuring IP Utilities2-10304234-A Rev 00TFTP OverviewThe Trivial File Transfer Protocol (TFTP) is a TCP/IP standard protocol for transferring files

Overview of IP Utilities304234-A Rev 002-11 Both devices involved in a TFTP transfer are senders and receivers. One device sends data and receives ack

304234-A Rev 00vContents PrefaceBefore You Begin ...

Configuring IP Utilities2-12304234-A Rev 00To use Telnet to access the Technician Interface, you must assign at least one IP address to the router. Th

Overview of IP Utilities304234-A Rev 002-13 Figure 2-3. Telnet ServerTelnet ClientWhen you create a Telnet client, the router sends outbound requests

Configuring IP Utilities2-14304234-A Rev 00Figure 2-4. Telnet ClientTCP0005ATCPconnection$Outbound Telnet sessionTelnet (server)Telnet (client)Console

Overview of IP Utilities304234-A Rev 002-15 NTP OverviewThe Network Time Protocol (NTP) synchronizes the timing of internal clocks of various network

Configuring IP Utilities2-16304234-A Rev 00There are two types of time servers in the NTP model: primary time servers and secondary time servers. A pr

Overview of IP Utilities304234-A Rev 002-17 How NTP Distributes Time Within the SubnetNTP distributes time through a hierarchy of primary and secondar

Configuring IP Utilities2-18304234-A Rev 00NTP uses the following criteria to determine the time server whose time is best:• Time server with the lowe

Overview of IP Utilities304234-A Rev 002-19 Figure 2-6. NTP Time Servers Operating in Unicast Client Mode Broadcast and Multicast Client ModeIn broadc

Configuring IP Utilities2-20304234-A Rev 00NetBIOS OverviewThe Network Basic Input/Output System (NetBIOS) is a session layer communications service u

Overview of IP Utilities304234-A Rev 002-21 • Use a server’s NetBIOS name to determine the server’s network address. The application issues a name que

vi304234-A Rev 00Connection Types ...2-4Connections and Co

Configuring IP Utilities2-22304234-A Rev 00The following steps occur:1. The client issues a name query request to NetBIOS on the host, specifying the

Overview of IP Utilities304234-A Rev 002-23 The server responds to the name query request by issuing a positive name query response, containing the IP

Configuring IP Utilities2-24304234-A Rev 00Forwarding Name Queries over an Unnumbered InterfaceNetBIOS cannot be configured directly on an unnumbered

Overview of IP Utilities304234-A Rev 002-25 How the DNS Proxy Server WorksClients on a LAN typically use DNS servers to resolve a host name to an IP a

Configuring IP Utilities2-26304234-A Rev 00How the DNS Cache WorksThe DNS proxy caches DNS records to improve performance, reduce network traffic, and

304234-A Rev 003-1 Chapter 3Customizing TCP ServicesThis chapter describes how to customize TCP services on the router. It assumes you have configured

Configuring IP Utilities3-2304234-A Rev 00Configuring TCP Using the BCC or Site ManagerTable 3-1 lists the TCP configuration tasks described in this c

Customizing TCP Services304234-A Rev 003-3 Using Site ManagerComplete the tasks in the following table to disable and reenable TCP on the router.Setti

Configuring IP Utilities3-4304234-A Rev 00Using the BCCBy default, the router sets the minimum retransmission timeout value to 250 milliseconds (ms).

Customizing TCP Services304234-A Rev 003-5 Setting the Maximum Retransmission TimeoutYou can specify a maximum value for the retransmission timeout. W

304234-A Rev 00viiChapter 4 Customizing FTP ServicesConfiguring FTP Using the BCC or Site Manager ...

Configuring IP Utilities3-6304234-A Rev 00Using Site ManagerComplete the tasks in the following table to specify a maximum value for the retransmissio

Customizing TCP Services304234-A Rev 003-7 Using Site ManagerComplete the tasks in the following table to set the maximum window size (in bytes) that

304234-A Rev 004-1 Chapter 4Customizing FTP ServicesThis chapter describes how to customize FTP services on the router. It assumes you have configured

Configuring IP Utilities4-2304234-A Rev 00Configuring FTP Using the BCC or Site ManagerTable 4-1 lists the FTP configuration tasks described in this c

Customizing FTP Services304234-A Rev 004-3 For example, the following command line reenables FTP on the router.ftp# enableftp#Using Site ManagerComple

Configuring IP Utilities4-4304234-A Rev 00For example, the following command sequence specifies volume 5 as the default volume and displays attributes

Customizing FTP Services304234-A Rev 004-5 Specifying the Number of Login RetriesThe FTP login retries value is the number of FTP login retries that F

Configuring IP Utilities4-6304234-A Rev 00Specifying the Maximum FTP Idle TimeoutThe FTP idle time is the length of time (in seconds) that FTP waits b

Customizing FTP Services304234-A Rev 004-7 Specifying the Maximum Number of FTP SessionsYou can determine the maximum number of FTP sessions you want

viii304234-A Rev 00Changing Login Retries ...6-14Using Telnet

Configuring IP Utilities4-8304234-A Rev 00Specifying the Data Transmission TypeYou can determine the type of data transmission you want to use to tran

Customizing FTP Services304234-A Rev 004-9 Specifying a Data Transfer ValueYou can determine how the Internet transport layer handles datagrams on a d

Configuring IP Utilities4-10304234-A Rev 00Specifying the TCP Window SizeYou can determine the size of the window you require on your system for TCP c

304234-A Rev 005-1 Chapter 5Customizing TFTP ServicesThis chapter describes how to customize Trivial File Transfer Protocol (TFTP) services on the rou

Configuring IP Utilities5-2304234-A Rev 00Configuring TFTP Using the BCC or Site ManagerTable 5-1 lists the TFTP configuration tasks described in this

Customizing TFTP Services304234-A Rev 005-3 Using Site ManagerTo disable and reenable TFTP services, perform the following actions:Specifying the Defa

Configuring IP Utilities5-4304234-A Rev 00Using Site ManagerComplete the tasks in the following table to specify the appropriate volume number on whic

Customizing TFTP Services304234-A Rev 005-5 Using Site ManagerComplete the tasks in the following table to specify the number of seconds that TFTP wai

Configuring IP Utilities5-6304234-A Rev 00Using Site ManagerComplete the tasks in the following table to specify a close timeout value.Specifying the

Customizing TFTP Services304234-A Rev 005-7 Using Site ManagerComplete the tasks in the following table to specify the number of retransmissions that

304234-A Rev 00ixConfiguring a NetBIOS Cache ...8-4Enabling Name

304234-A Rev 006-1 Chapter 6Customizing Telnet ServicesThis chapter describes how to customize Telnet services on the router. It assumes you have conf

Configuring IP Utilities6-2304234-A Rev 00Configuring Telnet Using the BCC or Site ManagerTable 6-1 lists the Telnet configuration tasks described in

Customizing Telnet Services304234-A Rev 006-3 Customizing the Telnet ConfigurationAfter you start the Telnet server to establish inbound Telnet sessio

Configuring IP Utilities6-4304234-A Rev 00Using Site ManagerComplete the tasks in the following table to specify a new manager’s login script file.Cha

Customizing Telnet Services304234-A Rev 006-5 Using Site ManagerComplete the tasks in the following table to specify a new user’s login script file.En

Configuring IP Utilities6-6304234-A Rev 00For example, this command line allows users to cancel the user autoscript at login:server# force-logout disa

Customizing Telnet Services304234-A Rev 006-7 For example:telnet# serverserver# disableTo reenable a Telnet server on the IP router, navigate to the T

Configuring IP Utilities6-8304234-A Rev 00Specifying the Maximum Number of Lines on the ConsoleYou can specify the maximum number of lines displayed o

Customizing Telnet Services304234-A Rev 006-9 Pausing Telnet Console OutputBy default, Telnet console output pauses after each screen fills with data.