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TCP/IP Configuration, LAN-to-LAN Application

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Chapter 7 TCP/IP Configuration This chapter describes how to configure your Model RM356 Modem Router for TCP/IP. Depending on your particular applications, you must configure different menus. For instance, Internet access is the most common application of TCP/IP. For this application, you should configure Menu 4. Configurations for other applications are provided in the following sections. LAN-to-LAN Application An example of a typical LAN-to-LAN application is to use the router to call from a branch office to the headquarters, as shown in Figure 7-1. Branch office Corporate headquarters Model RM356 router 56 kbps LAN Modem Router Remote Access PWR TEST COL 1 2 3 MODEM MODEL RM356 4 OH CD TD RD Model RM356 router 56 kbps LAN Modem Router Remote Access PWR TEST COL 1 2 3 MODEM MODEL RM356 4 OH CD TD RD Figure 7-1. LAN-to-LAN Application 8697EA For the branch office, you must configure a remote node in order to dial out to the headquarters. Additionally, you may also need to configure static routes if some services reside beyond the immediate remote LAN. TCP/IP Configuration 7-1

Section	Page
Reference Guide for the Model RM356 Modem Router	1
Contents	5
Figures	11
Tables	13
Preface	15
Purpose	15
Audience	15
Conventions	16
Special Message Formats	16
Use of Enter, Type, and Press	16
Other Conventions	17
Related Publications	17
Chapter1 Introduction	19
About the Router	19
Features	19
Key Features	20
V.90 Support	21
TCP/IP Support	21
IP Address Masquerading by Dynamic NAT+	21
Automatic Configuration of Attached PCs by DHCP	21
Security	22
Calling Line Identification	22
PAP and CHAP Authentication	22
Callback	22
Management Support	22
Basic Router Concepts	23
What is a Router?	23
Routing Information Protocol	23
IP Addresses and the Internet	24
Netmask	26
Subnet Addressing	27
Private IP Addresses	29
Single IP Address Operation Using NAT	30
Address Resolution Protocol	31
Domain Name Server	31
IP Configuration by DHCP	32
Chapter2 Router Installation and Connection	33
Package Contents	33
Checklists	34
Telephone Line Checklist	34
ISP Checklist	34
Single-User Account	35
LAN Account	35
Account Information	35
Network Checklist	36
Connecting the Router	37
Connecting the Serial Cable (Optional)	39
Connecting to the Line Port	39
Connecting to the Hub Ports	40
Connecting a Telephone, Fax, or Modem	40
Connecting the Power Adapter	40
Connecting for Configuration	41
Connecting Through the Serial Port	41
Connecting Through a Telnet Connection	42
Chapter3 Router Configuration	43
Configuration Methods	43
Powering on the Router	44
Navigating the Manager	45
Manager Menu Summary	47
General Setup Menu	48
MODEM Menus	49
MODEM Setup Menu	49
Advanced MODEM Setup Menu	50
Ethernet Menu	51
General Setup Menu	51
DHCP and TCP/IP Setup	52
Manager Password Setup	54
Chapter4 Configuration for Internet Access	55
Information Checklist	55
Internet Access Configuration	56
Configuration for Single-User Account	57
Backup ISP Accounts	58
Configuring for a Backup ISP	58
Switching to a Backup ISP	58
Chapter5 Remote Node Configuration	59
Editing PPP Options	62
Editing Script Options	63
Chapter6 Dial-In Configuration	65
Default Dial-In Setup	65
Dial-In User Setup	67
More On CLID	69
Chapter7 TCP/IP Configuration	71
LAN-to-LAN Application	71
Remote Node Setup	72
Static Route Setup	74
Chapter8 Filter Configuration	77
Router Filter Structure	78
Configuring a Filter Set	78
Configuring a Filter Rule	80
TCP/IP Filter Rule	80
Generic Filter Rule	83
Applying a Filter Set	84
Reducing Unnecessary Calls by Windows 95	85
Diagnosing the Situation	85
Implementing the Filter	87
Applying the Filter	90
Chapter9 System Maintenance	91
System Status	91
Terminal Baud Rate	93
Log and Trace	93
View Error Log	94
Syslog and Accounting	94
Diagnostic Menu	96
Call Testing and TCP/IP Tools	97
System Tools	98
Back Up Configuration	99
Restore Configuration	99
Software Update	99
Command Interpreter Mode	100
Call Control	100
Blacklist	101
Budget Management	101
Call History	101
Chapter10 Troubleshooting	103
Basic Functioning	103
LEDS	103
LAN Link LED	103
Troubleshooting a TCP/IP Network Using a Ping Utility	104
Testing the LAN Path to Your Router	104
Testing the Path from Your PC to a Remote Device	105
Troubleshooting a Remote Node or ISP Connection	106
Troubleshooting a Remote User Connection	106
Troubleshooting the Manager Interface	107
Restoring the Default Configuration and Password	108
Using the Packet and Log Trace	109
Packet Trace Display Format	110
Appendix A Technical Specifications	111
General Specification	111

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TCP/IP Configuration

7-1

Chapter 7

TCP/IP Configuration

This chapter describes how to configure your Model RM356 Modem Router for TCP/IP.

Depending on your particular applications, you must configure different menus. For instance,

Internet access is the most common application of TCP/IP. For this application, you should

configure Menu 4. Configurations for other applications are provided in the following sections.

LAN-to-LAN Application

An example of a typical LAN-to-LAN application is to use the router to call from a branch office

to the headquarters, as shown in

Figure 7-1

Figure 7-1.

LAN-to-LAN Application

For the branch office, you must configure a remote node in order to dial out to the headquarters.

Additionally, you may also need to configure static routes if some services reside beyond the

immediate remote LAN.

8697EA

Branch office

Model RM356

router

Model RM356

router

Corporate

headquarters

RM356

Modem Router

RM356

Modem Router