3Com 980-000077/002 manuale d’uso

® G ETTING C ONNECTED G UIDE http://ww w .3com.com / Part No. 980-000077/002 Published: September 1997 Get_con.bk : FRONTMTR.A5 Page i Friday, October 3, 1997 1:49 PM[...]

3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8145 © 3Com Eur ope Limited, 1997 . All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission fro m 3Com Europe Limited. 3C[...]

C ONTENTS A BOUT THIS G UIDE Finding Specific Informa tion in this Guide 1 Conventions 2 1 I NTRODUCTION Requirements 1-1 Management System Commands 1-1 Unit Naming Convention 1-1 “One-to-one” Configuration 1-2 Leased Lines 1-2 Configuration by T elephone 1-2 2 B RIDGING AND IP Bridging and IP 2-1 Configuration Options 2-1 Outline of Configurat[...]

Configuring a Remote Unit to Route IP 3-6 Configuring a Unit Using the “Quick Configuration” Utility 3 -7 Configuring a Remote Unit from the Central Site 3-9 Configuring the Central Site Unit 3-10 Configuring the Remote Unit 3-13 4 N OVELL IPX AND B RIDGING Novell IPX Bridging 4-1 Configuration Options 4-1 Outline of Configuration Procedur e 4-[...]

A BOUT THIS G UIDE About This Guide provides an overview of this guide, describes guide conventions and tells you where to look for specific information. This guide describes the basic steps requir ed to configure a unit to bridge or route IP or IPX data packets to a r emote site using ISDN. This guide is intended to be used by people with some tec[...]

2 A BOUT THIS G UIDE Conventions T able 1 and T able 2 l ist conventions that are use d throughout this guide. T able 1 Notice Icons Icon Notice Type Description Information note Important features or instructions Caution Risk to personal safety, system damage, or loss of data Warning Risk of severe personal injury T able 2 T ext Conventions Conven[...]

1 I NTR ODUCTION This guide is intended to aid the configuration of a unit in a number of common circumstances. It assumes that the reader is familiar with basic networking terminology and techniques and has read the Internetworking Concepts Guide . Requirements Before attempting any configuration of the unit, the IP addr ess (and subnet mask) of t[...]

1-2 C HAPTER 1: I NTRODUCTION “One-to-one” Configuration In situations where a very simple connection is r equired between two units only , it is recommended that one unit is nominated as the “central site” (configured first) and the other as the “r emote site” (configured second), following the r elevant sequence for each. Leased Lines[...]

2 B RIDGING AND IP This chapter shows how to configure units to operate as bridges, using the Internet Protocol (IP) data packets between two networks for management and control only . Configuration steps are given for: ■ Manual configuration of the central site unit. ■ Quick Configuration of the remote unit. ■ Remote configuration of the rem[...]

2-2 C HAPTER 2: B RIDGING AND IP Altern atively , the remote site unit can be configured by utilizing the remote configuration facility ( REM ) of the central site unit. Outline of Configuration Procedur e The steps below are intended as an outline of the sequence for configuring a unit for bridging and IP . They are for guidance only and must be u[...]

Manual Configuration of a Central Site Unit for Bridging and IP 2-3 Manual Configuration of a Central Site Unit for Br idging and IP The central site unit becomes the main host/node for bridging. CAUTION: Do not reset the unit if has already been installed on the network and configured to bridge or route IPX, and is required to continue bridging or[...]

2-4 C HAPTER 2: B RIDGING AND IP Assign the Unit Name The unit must be assigned a unique name. The unit software relies on associating unit names with ISDN numbers and IP addresses for its core functionality . 1 Enter CO SYS to display the System Parameters screen. 2 T ype a unique name for the unit in the Unit Name fie ld. It can have up to 12 cha[...]

Configuring a Remote Unit for Brid ging and IP 2-5 each remote unit having a valid, unique IP addr ess. Ensure that one is entered for each r emote unit. 1 Enter CO IS NU to display the ISDN Numbers screen. 2 Enter ADD to add a new entry to the numbers table. 3 T ype the name of the remote unit in the Name field and the ISDN number for that unit in[...]

2-6 C HAPTER 2: B RIDGING AND IP Configuring a Unit using the “Quick Configuration” Utility If the central site unit has been configured, the Quick Configuration utility can be used at the remote site to configure the r emote site unit. Assign the Unit Name, IP Address and Subnet Mask The remote unit must be assigned a unique name and a valid, [...]

Configuring a Remote Unit for Brid ging and IP 2-7 5 When the automatic call has shut down (after approximately 90 seconds), enter CO IS AUTO IP to check the entries in the IP Autocall table. 6 If there ar e no new e ntries in the ISDN Autocall table, check that the name and ISDN number for the central site unit have been entered correctly and then[...]

2-8 C HAPTER 2: B RIDGING AND IP 3 Enter REM to display the Remote Units screen. 4 If the central site unit name and IP address are not listed, make a manual call of 5 minutes duration. 5 Enter CALL followed by the central site number . 6 While the call is up, press [Ctrl]+[V] at fr equent intervals to refresh the Remote Units screen. When the cent[...]

Configuring a Remote Unit from the Central Site 2-9 Configure the ISDN network type to the corr ect setting for the remote site, following the sequence of steps described in “Configur e the ISDN Network T ype” on page 2-4 . When the unit is received at the remote site, ensure that it is powered on and that the ISDN Port is connected to a correc[...]

2-10 C HAPTER 2: B RIDGING AND IP 3 T ype the name assigned to the remote unit in the Remote Unit field. Unit names are case-sensitive and must be entere d correctly . 4 T ype the IP address assigned to the r emote unit in the IP Address field. 5 Press [Ctrl]+[E] to submit the new setting and then enter SAVE Establish a Remote Management Session A [...]

Configuring a Remote Unit from the Central Site 2-11 3 Press [Ctrl]+[E] to submit the new setting and then enter SAVE Configure the Ethernet Port Changing the IP address during the rem ote management session causes the session to be disconnected when the new IP address is submitted. This is normal. 1 Enter CO PO to display the Port Configuration sc[...]

2-12 C HAPTER 2: B RIDGING AND IP 4 Press [Ctrl]+[E] to submit the new setting and then enter SAVE Configure the ISDN Autocall T able Set up the ISDN Autocall table to associate the central site unit IP address with its name. 1 Enter CO IS AUTO IP to display the ISDN IP Autocall Addresses screen. 2 Enter ADD to add an entry to the ISDN IP Autocall [...]

Configuring a Remote Unit from the Central Site 2-13 Cancelling ISDN Calls All ISDN calls made by the unit, and those which are being answer ed by the unit, can be cancelled using the following te chnique: 1 Enter CO PO to display the Port Configuration screen. 2 Select the first ISDN port using the Arrow keys and enter ED PO 3 T ype [Ctrl]+[E] to [...]

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3 R OUTING IP This chapter shows how to configure units to r oute IP data packets between two networks, using ISDN. Configuration steps are given for: ■ Manual configuration of the central site router . ■ Quick Configuration of the remote r outer . ■ Remote configuration of the remote router fr om the central site. Routing IP If data is requi[...]

3-2 C HAPTER 3: R OUTING IP Outline of Configuration Procedur e The steps below are intended as an outline of the sequence for configuring a unit for bridging and IP . They are for guidance only and must be used in conjunction with the full description given in the following pages. There ar e seven basic steps required for manual configuration of a[...]

Manual Configuration of a Central Site Unit for Routing IP 3-3 Manual Configuration of a Central Site Unit for Routing IP If the central site unit is being configured for the first time, or if it is an entirely new installation, then reset the unit to the factory default settings by entering CO STD CAUTION: Do not reset the unit if has already been[...]

3-4 C HAPTER 3: R OUTING IP Assign the Unit Name The unit must be assigned a unique name. The unit software relies on associating unit names with ISDN numbers and IP addresses for its core functionality . 1 Enter CO SYS to display the System Parameters screen. 2 T ype a unique name for the unit in the Unit Name fie ld. It can have up to 12 characte[...]

Manual Configuration of a Central Site Unit for Routing IP 3-5 Configure the ISDN Numbers T able Set up the ISDN numbers table to associate each remote unit name with an ISDN number and an IP address. Central site autocalls rely on each remote unit having a valid, unique IP addr ess. Ensure that one is entered for each r emote unit. 1 Enter CO IS N[...]

3-6 C HAPTER 3: R OUTING IP 6 Press [Ctrl]+[E] to submit the new setting and then enter SAVE Configure IP Routing—“Static Route” Entries IP routes which are manually enter ed into the IP Routing table are called static routes . These routes ar e added to the routing table to ensure that r outes between units or the critical paths for importan[...]

Configuring a Remote Unit to Route IP 3-7 Follow the sequence of steps for resetting the unit as described in “Manual Configuration of a Central Site Unit for Routing IP” on page 3-3 . Configuring a Unit Using the “Quick Configuration” Utility If the central site unit has been configured, the Quick Configuration utility can be used at the r[...]

3-8 C HAPTER 3: R OUTING IP 3 Leave the three fields for configuring the ISDN link set to UNNUMBERED 4 Leave the IP Address of the r emote hosts network field and the IP Mask of the remote hosts network field at the suggested defaults. 5 Press [Ctrl]+[E] to submit the new setting. If the ISDN line has been correctly connected to the units and is fu[...]

Configuring a Remote Unit from the Central Site 3-9 example, if the central site unit is named “london”, then enter REM london ■ If the tables are working corr ectly and the ISDN lines are functioning properly , then the Enter Password scr een on the central site unit will be displayed. Go to step 8, below . 2 If the Enter Password scr een on[...]

3-10 C HAPTER 3: R OUTING IP CAUTION: Prior to despatch, it is essential that the unit has the ISDN Network T ype field configured to match the ISDN network type at the remote site. Prior to Despatch Power on the unit and follow the sequence of steps for resetting the unit to the factory default configuration, as described in “Manual Configuratio[...]

Configuring a Remote Unit from the Central Site 3-11 Configure the ISDN Numbers T able on the Central Site Unit The ISDN Numbers table entry on the central site unit must be completed with the name that the remote unit will have, once that unit has been fully configured. 1 Enter CO IS NU to display the ISDN Numbers screen. 2 Enter ADD to display th[...]

3-12 C HAPTER 3: R OUTING IP It is important to enter static routes when configuring the unit to use unnumbered links because these routes will not be learned by the unit. Static routes must be entered at both ends of the link. Set up the IP Routing table to associate an IP route with a unit name. 1 Enter CO RO IP to display the Configured IP Route[...]

Configuring a Remote Unit from the Central Site 3-13 Configuring the Remote Unit Assign the Unit Name 1 Enter CO SYS to display the System Parameters screen. 2 T ype in the name assigned to the unit in the Unit Name field. The name must be exactly the same as that used to configure the central site unit ISDN Numbers table. Unit names are case-sensi[...]

3-14 C HAPTER 3: R OUTING IP 10 Enter REM to establish a new remote management session. 11 Enter PASSWORD at the Enter Password scr een. 12 Enter SAVE to save the new configuration. Configure the ISDN Numbers T able Set up the ISDN numbers table to associate the central site unit name with its ISDN number . 1 Enter CO IS NU to display the ISDN Numb[...]

Configuring a Remote Unit from the Central Site 3-15 Configure IP Routing—“Static Return Route” Entry It is important to enter a static return route when configuring the remote unit to use unnumber ed links because these routes will not be learned by the unit. The static retur n route must be entered before IP r outing is enabled otherwise th[...]

3-16 C HAPTER 3: R OUTING IP Enable Routing on the Central Site Unit The central site unit can now have IP routing r e-enabled. 1 Enter CO RO PA to display the Router Options screen. 2 T oggle the IP Routing field to ENABLED using the Spacebar . 3 Press [Ctrl]+[E] to submit the new setting and then enter SAVE Save the Remote Unit Configuration Both[...]

Configuring a Remote Unit from the Central Site 3-17 setting) to cancel the calls but additional, unnecessary , call charges will have accrued. Cancelling Calls T o cancel all of the ISDN calls, follow the sequence of steps described in “Cancelling ISDN Calls” on p age 2-13 . Get_con.bk : ROUT_IP.FRM Page 17 Friday, October 3, 1997 1:49 PM[...]

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4 N OVELL IPX AND B RIDGING This chapter shows how to configure units to bridge Internet Packet Exchange (IPX) Pr otocol data packets between two networks, using ISDN. Note that the IPX protocol, although similarly named, is completely different from the Internet Protocol (IP) and must not be confused with it. Configuration steps are given for: ■[...]

4-2 C HAPTER 4: N OVELL IPX AND B RIDGING The central site unit cannot be automatically configured using the Quick Configuration facility of the unit because this facility r equires a ready-configur ed unit to act as a reference point. The Quick Configuration facility should only be used at a remote site. Altern atively , the remote site unit can b[...]

Manual Configuration of a Central Site Unit for Bridging and IPX 4-3 Manual Configuration of a Central Site Unit for Bridging and IPX The central site unit becomes the main host/node for bridging. CAUTION: Do not reset the unit if has already been installed on the network and configured to bridge or route IP , and is required to continue bridging o[...]

4-4 C HAPTER 4: N OVELL IPX AND B RIDGING Assign the Unit Name The unit must be assigned a unique name. The unit software relies on associating unit names with ISDN numbers and IP addresses for its core functionality . 1 Enter CO SYS to display the System Parameters screen. 2 T ype a unique name for the unit in the Unit Name fie ld. It can have up [...]

Configuring a Remote Unit for Bridging and IPX 4-5 ISDN links will not be possible. In the U.S.A., an additional customer identification number , known as a Ser vice Provider Identification Number (SPID) may be requir ed. 1 Enter CO IS PA to display the ISDN Parame ters screen. 2 T oggle the Network T ype field, using the Spacebar , to the corr ect[...]

4-6 C HAPTER 4: N OVELL IPX AND B RIDGING Assign the Unit Name, IP Address and Subnet Mask The remote unit must be assigned a unique name and IP addr ess. A valid subnet mask must be specified too. The name and IP address must exactly match the entries in the central site unit’ s ISDN Numbers and ISDN Autocall tables for this remote unit. Set the[...]

Configuring a Remote Unit from the Central Site 4-7 there should be NSAP entries, NRIP entries and Autocall entries in the table. 5 Press [Return] to continue the unit configuration. It is normal that no NRIP or NSAP table entries are added on the remote unit. 6 Enter CO IS AUTO IPX to check the entries in the IPX Autocall table. 7 Enter SAVE to sa[...]

4-8 C HAPTER 4: N OVELL IPX AND B RIDGING It is good practise to have ensured that the r emote unit was restor ed to the factory default settings b efore being despatched to the remote site. CAUTION: Prior to despatch, it is essential that the unit has the ISDN Network T ype field configured to match the ISDN network type at the remote site. Prior [...]

Configuring a Remote Unit from the Central Site 4-9 Configure the ISDN Numbers T able on the Central Site Unit A new entry must be added to the ISDN Numbers table on the central site unit, giving the name that the remote unit will have once that unit has been fully configured, and the ISDN number for the unit. 1 Enter CO IS NU to display the ISDN N[...]

4-10 C HAPTER 4: N OVELL IPX AND B RIDGING Configuring the Remote Unit Assign the Unit Name 1 Enter CO SYS to display the System Parameters screen. 2 T ype the name assigned to the unit in the Unit Name field. The name must be exactly the same as that used to configure the central site unit ISDN Numbers table. Unit names are case-sensitive and must[...]

Configuring a Remote Unit from the Central Site 4-11 7 Press [Ctrl]+[E] to submit the new setting. 8 Submitting the new settings causes the remote management session to disconnect immediately . This is normal. 9 Press [Ctrl]+[D] to r etur n to the central site unit managem ent screens. 10 If the Remote Units screen is not displayed, enter REM to di[...]

4-12 C HAPTER 4: N OVELL IPX AND B RIDGING Make a manual call to the central site. 1 Enter CO IS NU to display the ISDN Numbers table. 2 Select the entry for the central site unit using the Arrow keys and enter CALL This call is made to allow the unit to receive NRIP and NSAP updates being advertised by the Novell server at the central site, which [...]

Configuring a Remote Unit from the Central Site 4-13 Close the Remote Management Session 1 Enter QUIT to terminate the remote configuration session. Press [Ctrl]+[D] if this command is not available. The Remote Units screen on the central site unit is displayed. Cancel the Manual Call It is important to remember that a manual call is still running [...]

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5 N OVELL IPX R OUTING This chapter shows how to configure units to r oute Internet Packet Exchange (IPX) Protocol data packets between two networks, using ISDN. Note that the IPX protocol, although similarly named, is completely different from the Internet Protocol (IP), which was covered in Chapter 3, and must not be confused with it. Configurati[...]

5-2 C HAPTER 5: N OVELL IPX R OUTING Outline of Configuration Procedur e The steps below are intended as an outline of the sequence for configuring a unit for routing IPX. They ar e for guidance only and must be used in conjunction with the full description given in the following pages. There ar e seven basic steps required for manual configuration[...]

Configuring a Central Site Unit for Routing IPX 5-3 configuration settings and port type and put it in a safe, accessible place. If the central site unit is being configured for the first time, or if it is an entirely new installation, then reset the unit to the factory default settings. 1 Press the [Return] key . 2 Enter PASSWORD (in upper -case l[...]

5-4 C HAPTER 5: N OVELL IPX R OUTING Configure the Ethernet Port A unique port IP address and the network subnet mask ar e requir ed for the Etherne t port (for management of the unit), even if the network is always entirely connected within a non-IP Netware environment. 1 Enter CO PO to display the Port Configuration scr een. 2 Select the LAN1 por[...]

Configuring a Central Site Unit for Routing IPX 5-5 Configure the ISDN Numbers T able Set up the ISDN numbers table to associate each remote unit name with an ISDN number . 1 Enter CO IS NU to display the ISDN Numbers screen. 2 Enter ADD to add a new entry to the numbers table. 3 T ype the name of the remote unit in the Name field. Unit names are c[...]

5-6 C HAPTER 5: N OVELL IPX R OUTING Configuring a Remote Unit to Route IPX If the remote site unit is being configur ed for the first time, or if it is an entirely new installation, then reset the unit to the factory default settings. Follow the sequence of steps for resetting the unit as described in “Configuring a Central Site Unit for Routing[...]

Configuring a Remote Unit to Route IPX 5-7 pass data. Contact the network administrator for more information about the frame type used. 7 Press [Ctrl]+[E] to submit the new setting and then enter SAVE Configure the ISDN Network T ype 1 Enter CO IS PA to display the ISDN Parame ters screen. 2 T oggle the Network T ype field to the correct ISDN netwo[...]

5-8 C HAPTER 5: N OVELL IPX R OUTING 6 Press [Ctrl]+[E] to submit the new setting and then enter SAVE Enable Novell RIP/SAP Learning Novell RIP/SAP learning must be enabled at both ends of the link. 1 Enter CO BR PA to display the Filter Parameters screen. 2 T oggle the Learn Novell RIP/SAP field to ENABLE using the Spacebar . 3 Press [Ctrl]+[E] to[...]

Configuring a Remote Unit from the Central Site 5-9 too. In a large network, there will be a large number of entries in the tables. 1 Enter CO RO NS to view the entries in the Novell IPX SAP table. 2 Enter CO RO NR to view the entries in the Novell IPX RIP tab le. If there ar e two or more servers listed in the Novell IPX SAP table but only one is [...]

5-10 C HAPTER 5: N OVELL IPX R OUTING CAUTION: Prior to despatch, it is essential that the unit has the ISDN Network T ype field configured to match the ISDN network type at the remote site. Prior to Despatch Power on the unit and follow the sequence of steps for resetting the unit to the factory default configuration, as described in “Configurin[...]

Configuring a Remote Unit from the Central Site 5-11 Configure the ISDN Numbers T able on the Central Site Unit Set up the ISDN numbers table to associate the name which the remote unit will have once it has been configured, with the ISDN number . 1 Enter CO IS NU to display the ISDN Numbers screen. 2 Enter ADD to add a new entry to the numbers tab[...]

5-12 C HAPTER 5: N OVELL IPX R OUTING 6 Enter PASSWORD (in upper -case letters) when the Enter Password screen is displayed. Configuring the Remote Unit Changing the IP address during the remote management session will cause the session to be disconn ected when the new address is submitted. This is normal. Assign the Unit Name The unit must be assi[...]

Configuring a Remote Unit from the Central Site 5-13 The frame type must be correct for the network environment in which the unit is operating. If the frame type is not correct, the unit will not pass data. Contact the network administrator for more information about the frame type used. 7 Press [Ctrl]+[E] to submit the new setting. The remote conf[...]

5-14 C HAPTER 5: N OVELL IPX R OUTING The IPX network number of the numbered link must be the same as that entered for this link in the central site ISDN Numbers table. 6 Press [Ctrl]+[E] to submit the new setting and then enter SAVE Enable IPX Routing 1 Enter CO RO PA to display the Router Options screen. 2 T oggle the IPX Routing field to ENABLED[...]

Configuring a Remote Unit from the Central Site 5-15 made to allow the unit to receive NRIP and SAP updates being advertised by the Novell IPX server at the central site. 1 Enter CO IS NU to display the ISDN numbers table. 2 Select the remote site unit entry using the Arr ow keys and enter CALL 3 Enter REM to display the Remote Units screen. 4 Sele[...]

5-16 C HAPTER 5: N OVELL IPX R OUTING T est the IPX Autocall T able T o test that the IPX Autocall table is functioning correctly , run a Novell client on a computer at the r emote site to see if that client can access the server located at the central site. Cancelling Calls T o cancel all of the ISDN calls, follow the sequence of steps described i[...]

6 PPP C ONFIGURATION FOR IP C ONNECTIONS This chapter gives the basic steps for configuring a simple Point-to-Point Protocol (PPP) connection to an Internet Service Provider (ISP). Configuring a PPP connection using numbered links is a complex procedur e and should only be attempted by experienced networking technicians. The configuration is not co[...]

6-2 C HAPTER 6: PPP C ONFI GURATION FOR IP C ONNECTIONS ■ The ISDN call type. ■ The name or (any) ID required to login to the ISP r outer . ■ The Password Authentication Pr otocol (P AP) or Challenge Handshake Authentication Protocol (CHAP) passwor ds requir ed to login to the ISP router . It is essential that the ISP specifies which of these[...]

Requirements 6-3 8 For simple connections to the ISP , where all IP traffic goes to the Internet, leave the IP Address of the r emote hosts network field set to Internet . 9 For simple connections to the ISP , where all IP traffic goes to the Internet, leave the IP Mask of the remote hosts network field set to Internet . 10 For simple connections t[...]

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INDEX A assigning unit name 2-4, 2-10, 3-4, 4-4, 4-10, 5-3, 5-6, 5-12 B basic steps routing IP 3-2 bridging IP 2-1 configuration options 2-1 configuring the central site 2-3 configuring the remote unit 2-5 Quick Configuration 2-6 bridging IPX configuring the central site 4-3 configuring the remote unit 4-5 Quick Configuration 4-5 remote configur at[...]

2 INDEX establishing a remote management session 2-10, 3-12, 4-9, 5-11 Ethernet port configuration 2-4, 2-11, 3-4, 3-13, 4-4, 4-10, 5-4, 5-6, 5-12 G Get Nearest Server no specific server 5-9 specific server for responses 5-8 I Internet connecting using PPP 1-1, 6-1 IP address Quick Configuration 2-6 IP autocall table testing 2-7, 3-8 IP bridging 2-[...]

INDEX 3 IP routing 3-7 remote unit to r oute IP 3-7 subnet mask 2-6, 3-7, 4-6 R remote configur ation bridging IPX 4-7 Ethernet port 3-13 IP routing 3-9 IPX routi ng 5-9 ISDN autocall table 2-12, 3-14 ISDN numbers table 2-11 , 3-14, 4-11 preparing central site 5-10 unit name 2-10, 3-1 3 remote mana gement establishing a session 2-10, 3-12 remote ma[...]

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