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System Maintenance, System Status

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Chapter 8 System Maintenance The Model RT311 or RT314 Internet Access Gateway Router provides tools for maintenance and diagnostics. These tools include displays of system status and connections, log and trace capabilities, and upgrades to the system software. This chapter describes the use of these tools. System Status The System Maintenance Status Menu (Menu 24.1) allows the user to monitor the operation of the router. This screen displays the current status of the two Ethernet ports and the number of packets sent and received. The system software version is also displayed. To access the System Maintenance Status Menu: 1. Enter 24 from the Main Menu to display the System Maintenance menu (Figure 8-1). System Maintenance 8-1

Section	Page
Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers	1
Contents	5
Figures	11
Tables	13
Preface	15
Purpose	15
Audience	15
Conventions	16
Special Message Formats	16
Use of Enter, Type, Press, and Click	16
Other Conventions	17
Related Publications	17
Chapter1 Introduction	19
About the Router	19
Features	19
Key Features	20
Autosensing 10/100 Ethernet	21
TCP/IP	21
IP Address Masquerading by Dynamic NAT+	21
Port Forwarding with NAT	21
Automatic Configuration of Attached PCs by DHCP	22
DNS Proxy	22
PPP over Ethernet (PPPoE)	22
Security	22
PCs Hidden by NAT	22
Packet Filtering	22
Port-Address Translation	22
Management	23
Browser-based Setup Wizard	23
Manager Interface	23
Chapter2 Installing and Connecting the Router	25
Package Contents	25
Local Network Hardware Requirements	26
Router Description	27
Connecting the Router	29
Connecting to your Local Ethernet Network	29
Connecting the Model RT311 router to your Local Area Network	30
Connecting the Model RT314 router to your Local Area Network	30
Connecting to the Internet	30
Connecting the Serial Cable (Optional)	31
Connecting the Power Adapter	31
Verifying Power	31
Chapter3 Preparing Your Network	33
Preparing the PCs for IP Networking	33
Configuring Windows 95 or Windows 98 for IP Networking	34
Configuring TCP/IP Properties	36
Verifying TCP/IP Properties	37
Your Internet Account	37
Login Protocols	37
Account Information	38
Obtaining Configuration Information After the ISP Configures Your PC	38
Sharing the Internet Connection	39
Configuration Methods	39
Chapter4 Using Your Browser for Configuring the Router	41
Configuring for Internet Access	41
Other Features of the Browser Interface	47
Chapter5 Using the Manager Interface for Initial Router Configuration	51
Connecting for Configuration	51
Connecting Through a Serial Port	52
Connecting Through a Telnet Connection	52
Using the Manager Interface	54
Turning on Power to the Router	54
Navigating the Manager	56
Manager Menu Summary	56
General Setup Menu	58
WAN Setup	59
LAN Setup	60
LAN Port Filter Setup Menu	60
TCP/IP and DHCP Setup	61
Manager Password Setup	63
Chapter6 Using the Manager Interface to Configure the Router for Internet Access	65
Internet Access Configuration	65
Configuration for Local Servers	67
Local Web and FTP Server Example	68
Local Game Host or Videoconference Example	69
Setting Static Routes	69
Static Route Example	72
Dynamic DNS	74
Chapter7 Configuring Filters	75
Router Filter Structure	75
Configuring a Filter Set	76
Configuring a Filter Rule	80
TCP/IP Filter Rule	80
Generic Filter Rule	83
Applying a Filter Set	84
Default Filters	85
Filter 1: NetBIOS_WAN	85
Filter 2: NetBIOS_LAN	85
Filter 3: TELNET_FTP_WAN	85
Chapter8 System Maintenance	87
System Status	87
Terminal Baud Rate	90
Log and Trace	90
View Error Log	90
Syslog and Accounting	91
Diagnostic Menu	92
Back Up and Restore Configuration	94
Backing Up and Restoring the Configuration with a Serial Connection	94
Backing Up and Restoring the Configuration Using FTP	95
Software Update	95
Updating Router Software Using a Serial Connection	95
Updating Router Software Using FTP	96
Command Interpreter Mode	97
Chapter9 Troubleshooting	99
Basic Functioning	99
PWR LED Not On	99
Test LED Never Blinks or LED Stays On	100
LNK/ACT LEDs Not On	100
Troubleshooting the ISP Connection	100
Troubleshooting a TCP/IP Network Using a Ping Utility	102
Testing the LAN Path to Your Router	102
Testing the Path from Your PC to a Remote Device	104
Troubleshooting the Manager Interface	104
Restoring the Default Configuration and Password	105
Using a Serial Connection	105
Using FTP	106
Chapter10 Networks and Routing Basics	107
Basic Router Concepts	107
What is a Router?	107
Routing Information Protocol	108
IP Addresses and the Internet	108
Netmask	110
Subnet Addressing	110
Private IP Addresses	113
Single IP Address Operation Using NAT	113
MAC Addresses and Address Resolution Protocol	115
Domain Name Server	115
IP Configuration by DHCP	116
Appendix A Technical Specifications	117
General Specifications	117
Glossary	119

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System Maintenance

8-1

Chapter 8

System Maintenance

The Model RT311 or RT314 Internet Access Gateway Router provides tools for maintenance and

diagnostics. These tools include displays of system status and connections, log and trace

capabilities, and upgrades to the system software. This chapter describes the use of these tools.

System Status

The System Maintenance Status Menu (Menu 24.1) allows the user to monitor the operation of the

router. This screen displays the current status of the two Ethernet ports and the number of packets

sent and received. The system software version is also displayed.

To access the System Maintenance Status Menu:

Enter 24 from the Main Menu to display the System Maintenance menu (

Figure 8-1