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Frontmat.fm  Page i  Tuesday, October 10, 2000  3:11 PM
Reference Guide for the 
Model RT328 and Model 
RH348 ISDN Routers
NETGEAR, Inc.
4500 Great America Parkway
Santa Clara, CA 95054
USA
M-RH348NA-2
September 2000
                                                                                                                                                                                                                                                                                    
                    
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                                        Frontmat.fm  Page ii  Tuesday, October 10, 2000  3:11 PM © 2000 by NETGEAR, Inc. All rights reserved. Trademarks NETGEAR™ is a trademark of Netgear, Inc. Windows® is a registered trademark of Microsoft Corporation. Other  brand and product names are trademarks or registered trademarks of their respective holders. Information is subject to  change without notice. All rights reserved. Statement of Conditions In the interest of improving internal design, operational function, and/or
                    
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                                      Frontmat.fm  Page iii  Tuesday, October 10, 2000  3:11 PM Bestätigung des Herstellers/Importeurs Es wird hiermit bestätigt, daß das Model RT328 ISDN Router und Model RH348 ISDN Router gemäß der im  BMPT-AmtsblVfg 243/1991 und Vfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben  einiger Geräte (z.B. Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die  Anmerkungen in der Betriebsanleitung. Das Bundesamt für Zulassungen
                    
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                            Frontmat.fm  Page iv  Tuesday, October 10, 2000  3:11 PM iv                                                                                                                                                                                                                                                                                                                                                                                                                                                     
                    
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                                 RH348TOC.fm  Page v  Tuesday, October 10, 2000  3:12 PM Contents  Preface Purpose ........................................................................................................................... xv Audience .......................................................................................................................... xv Conventions .....................................................................................................................xvi Special Messag
                    
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                                RH348TOC.fm  Page vi  Tuesday, October 10, 2000  3:12 PM Subnet Addressing .................................................................................................1-10 Private IP Addresses ..............................................................................................1-12 Single IP Address Operation Using NAT ................................................................1-13 Address Resolution Protocol ............................................................
                    
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                                       RH348TOC.fm  Page vii  Tuesday, October 10, 2000  3:12 PM Ethernet Setup .............................................................................................................3-11 General Setup Menu ..............................................................................................3-11 DHCP and TCP/IP Setup .......................................................................................3-12 Manager Password Setup ...........................................
                    
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                                RH348TOC.fm  Page viii  Tuesday, October 10, 2000  3:12 PM Reducing Unnecessary Calls by Windows 95 ................................................................8-9 Diagnosing the Situation ..........................................................................................8-9 Implementing the Filter ...........................................................................................8-11 Applying the Filter .................................................................
                    
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                                      RH348TOC.fm  Page ix  Tuesday, October 10, 2000  3:12 PM Troubleshooting a TCP/IP Network Using a Ping Utility ...............................................10-4 Testing the LAN Path to Your Router ......................................................................10-4 Testing the Path from Your PC to a Remote Device ...............................................10-5 Troubleshooting a Remote Node or ISP Connection ....................................................10-5 Troubl
                    
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                            RH348TOC.fm  Page x  Tuesday, October 10, 2000  3:12 PM x Contents                                                                                                                                                                                                                                                                                                                                                                                                                                              
                    
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                              RH348LOF.fm  Page xi  Tuesday, October 10, 2000  3:13 PM Figures Figure 1-1. Three Main Address Classes ...................................................................1-8 Figure 1-2. Example of Subnetting a Class B Address ............................................1-10 Figure 1-3. Single IP Address Operation Using NAT ................................................1-13 Figure 2-1. Front Panel of Model RT328 Router ........................................................2-4 Figure 2-
                    
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                            RH348LOF.fm  Page xii  Tuesday, October 10, 2000  3:13 PM Figure 9-1. Packet Examples .....................................................................................9-3 Figure 9-2. Trace Display for a Successful TCP/IP Protocol Connection ...................9-7 Figure 9-3. Trace Display for a Failed TCP/IP Protocol Connection ...........................9-7 Figure D-1. ISDN Protocol Analyzer Display ............................................................. D-4 Figure D-2. Trace Scre
                    
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                              RH348LOT.fm  Page xiii  Tuesday, October 10, 2000  3:13 PM Tables Table 1-1. Netmask Notation Translation Table for One Octet ................................1-11 Table 1-2. Netmask Formats ...................................................................................1-12 Table 2-1. LED Descriptions .....................................................................................2-5 Table 3-1. Manager Menu Commands  .................................................................
                    
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                            RH348LOT.fm  Page xiv  Tuesday, October 10, 2000  3:13 PM Table 9-1. System Maintenance Status Menu Fields ................................................9-1 Table 9-2. System Maintenance Status Menu Fields  ...............................................9-2 Table 9-3. System Maintenance - Log and Trace Menu Fields .................................9-4 Table 9-4. System Maintenance - Syslog and Accounting Menu Fields ...................9-5 Table 9-5. System Maintenance - Diagnostic Menu Fiel
                    
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                                    Preface.fm  Page xv  Tuesday, October 10, 2000  3:14 PM Preface ™ Congratulations on your purchase of the NETGEAR Model RT328 ISDN Router or Model  RH348 ISDN Router. These ISDN router models provide connection for one or more computer workstations to the  Internet or to the office over Integrated Services Digital Network (ISDN) lines. They operate at a  speed of up to 512 kilobits per second (Kbps) or 128 Kbps without compression. At these speeds,  you can download video clips, music
                    
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                                           Preface.fm  Page xvi  Tuesday, October 10, 2000  3:14 PM Reference Guide for the Model RT328 and Model RH348 ISDN Routers Conventions This section describes the conventions used in this guide. Special Message Formats This guide uses the following formats to highlight special messages:  Note: This format is used to highlight information of importance or special interest. Caution: This format is used to highlight information that will help you prevent  equipment failure or loss 
                    
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                                               Preface.fm  Page xvii  Tuesday, October 10, 2000  3:14 PM Reference Guide for the Model RT328 and Model RH348 ISDN Routers Other Conventions This guide uses the following typographical conventions: italics Book titles and UNIX file, command, and directory names. courier font Screen text, user-typed command-line entries. Initial Caps Menu titles and window and button names. [Enter] Named keys in text are shown enclosed in square brackets. The notation  [Enter] is used for th
                    
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                                  Intro.fm  Page 1  Tuesday, October 10, 2000  3:15 PM Chapter 1 Introduction This chapter describes the features of the NETGEAR Model RT328 ISDN Router and Model  RH348 ISDN Router and discusses planning considerations for installation. About the Router The Model RT328/RH348 router transports data from one local area network (LAN) to another  through a wide area network (WAN) connection. The router compares the network addresses of data packets sent through the LAN to the entries in  it
                    
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                                 Intro.fm  Page 2  Tuesday, October 10, 2000  3:15 PM Reference Guide for the Model RT328 and Model RH348 ISDN Routers Key Features The Model RT328/RH348 router provides the following features: • Standard basic rate ISDN (BRI) connection – ISDN, 2B+D, providing two 64 Kbps data channels and a 16 Kbps control channel – Four-wire S/T interface on Model RT328-S/RH348-S router – Two-wire U interface on Model RT328-U/RH348-U router – Two-wire NTT interface on Model RH348-D router • Protocol S