NETGEAR RT311 Reference Manual
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NETGEAR RT311 Reference Manual

NETGEAR RT311 Reference Manual

Internet access gateway routers
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Download this manual See also: Reference Manual, Installation Manual
Reference Guide for the
Model RT311 and RT314
Internet Access Gateway
Routers
NETGEAR, Inc.
4401 Great America Parkway
Santa Clara, CA 95054 USA
Phone 1-888-NETGEAR
M-RT311NA-2
June 2000

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  • Page 1 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers NETGEAR, Inc. 4401 Great America Parkway Santa Clara, CA 95054 USA Phone 1-888-NETGEAR M-RT311NA-2 June 2000...
  • Page 2 In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes to the products described in this document without notice. NETGEAR does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein.

  • Page 3: Customer Support

    Read instructions for correct handling. Customer Support Refer to the Support Information Card that shipped with your Model RT311 or RT314 Internet Access Gateway Router. World Wide Web NETGEAR maintains a World Wide Web home page that you can access at the universal resource locator (URL) http://www.netgear.com.

  • Page 5: Table Of Contents

    Special Message Formats ...xvi Use of Enter, Type, Press, and Click ...xvi Other Conventions ...xvii Related Publications ...xvii Chapter 1 Introduction About the Router ...1-1 Features ...1-1 Key Features ...1-2 Autosensing 10/100 Ethernet ...1-3 TCP/IP ...1-3 IP Address Masquerading by Dynamic NAT+ ...1-3 Port Forwarding with NAT ...1-3...
  • Page 6 Router Description ...2-3 Connecting the Router ...2-5 Connecting to your Local Ethernet Network ...2-5 Connecting the Model RT311 router to your Local Area Network ...2-6 Connecting the Model RT314 router to your Local Area Network ...2-6 Connecting to the Internet ...2-6 Connecting the Serial Cable (Optional) ...2-7...
  • Page 7 LAN Port Filter Setup Menu ...5-10 TCP/IP and DHCP Setup ...5-11 Manager Password Setup ...5-13 Chapter 6 Using the Manager Interface to Configure the Router for Internet Access Internet Access Configuration ...6-1 Configuration for Local Servers ...6-3 Local Web and FTP Server Example ...6-4 Local Game Host or Videoconference Example ...6-5...
  • Page 8 Backing Up and Restoring the Configuration with a Serial Connection ...8-8 Backing Up and Restoring the Configuration Using FTP ...8-9 Software Update ...8-9 Updating Router Software Using a Serial Connection ...8-9 Updating Router Software Using FTP ...8-10 Command Interpreter Mode ...8-11...
  • Page 9 IP Configuration by DHCP ...10-10 Appendix A Technical Specifications General Specifications ... A-1 Glossary Index Contents...
  • Page 10 Contents...
  • Page 11 Figure 2-1. RT311 Front Panel ...2-3 Figure 2-2. RT314 Front Panel ...2-3 Figure 2-3. RT311 Rear Panel ...2-4 Figure 2-4. RT314 Rear Panel ...2-5 Figure 3-1. Network Dialog Box—Network Components List ...3-3 Figure 4-1. Browser-based configuration main menu ...4-2 Figure 4-2.
  • Page 12 Figure 10-1. Three Main Address Classes ...10-3 Figure 10-2. Example of Subnetting a Class B Address ...10-5 Figure 10-3. Single IP Address Operation Using NAT ...10-8 Figures...
  • Page 13 Table 2-1. LED Descriptions ...2-4 Table 4-1. Menu 3.2 - System Status Fields ...4-7 Table 4-2. Router Statistics Fields ...4-9 Table 5-1. Manager Menu Commands ...5-6 Table 5-2. Manager Menu Summary ...5-6 Table 5-3. WAN Setup Fields ...5-9 Table 5-4.
  • Page 14 Tables...

  • Page 15: Preface

    This guide describes the features of the Model RT311 and RT314 Internet Access Gateway Routers and provides installation and configuration instructions. Audience To configure and install the Model RT311 and RT314 routers, you should have the following background and experience: •...

  • Page 16: Conventions

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway 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.

  • Page 17: Other Conventions

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Other Conventions This guide uses the following typographical conventions: italics Book titles and UNIX file, command, and directory names. Screen text, user-typed command-line entries. courier font Initial Caps Menu titles and window and button names.

  • Page 19: Introduction

    Chapter 1 Introduction This chapter describes the features of the NETGEAR Model RT311 and RT314 Internet Access Gateway Routers and discusses planning considerations for installation. About the Router The Model RT311 or RT314 Internet Access Gateway Router connects your local area network (LAN) to the Internet through an external single-user access device such as a cable modem or DSL modem.

  • Page 20: Key Features

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Key Features The Model RT311 and RT314 Internet Access Gateway Routers provide the following features: • Ethernet LAN connection at 10 megabits per second (Mbps) or 100 Mbps –...

  • Page 21: Autosensing 10/100 Ethernet

    Free technical support seven days a week, twenty-four hours a day Autosensing 10/100 Ethernet The Model RT311 and RT314 routers connect to either a 10 Mbps standard Ethernet network or a 100 Mbps Fast Ethernet network. The local LAN interface is autosensing and is capable of full-duplex operation.

  • Page 22: Automatic Configuration Of Attached Pcs By Dhcp

    PPP over Ethernet is a protocol for connecting remote hosts to the Internet over an always-on connection by simulating a dial-up connection. Security The Model RT311 and RT314 routers are equipped with several features designed to maintain security, as described in this section. PCs Hidden by NAT Network address translation (NAT) opens a temporary path to the Internet for requests originating from the local network.

  • Page 23: Management

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Management You can install, configure, and operate the router within minutes after connecting it to the network. Use your browser to configure for basic Internet access, or use Telnet to access the built-in manager interface for advanced features.
  • Page 24 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Introduction...

  • Page 25: Installing And Connecting The Router

    Installing and Connecting the Router This chapter provides instructions for installing the Model RT311 or RT314 Internet Access Gateway Router. Package Contents The product package should contain the following items: • Model RT311 or RT314 Internet Access Gateway Router •...

  • Page 26: Local Network Hardware Requirements

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Local Network Hardware Requirements The Model RT311 or RT314 Internet Access Gateway Router is intended for use in a network of workstations that are interconnected by twisted-pair Ethernet or Fast Ethernet cables.

  • Page 27: Router Description

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Router Description The front panels of the Model RT311 router contain status LEDs. Key: 1 = PWR (Power) LED 2 = TEST LED 3 = LOCAL LAN LNK/ACT (Link/Activity) and 100M LEDs 4 = INTERNET LNK/ACT (Link/Activity) LED Figure 2-1.
  • Page 28 INTERNET LNK/ACT (Link/Activity) Blinking The rear panels of the Model RT311 router and Model RT314 router are shown in Figure 2-4. Refer to these diagrams to identify all the ports on the router when you attempt to make any connections.

  • Page 29: Connecting The Router

    Your local network will attach to the router port or ports marked LOCAL. Because the Model RT314 router includes a four-port switch while the Model RT311 router has a single port for connection to your local network, the method of connection is different. Follow the procedure below for your specific model.

  • Page 30: Connecting The Model Rt311 Router To Your Local Area Network

    Connecting the Model RT311 router to your Local Area Network The Model RT311 router has a single port for connection to your local network. This port is wired as a host rather than a hub, and is intended to connect to a hub or switch in your network. To connect the Model RT311 router to your LAN: •...

  • Page 31: Connecting The Serial Cable (Optional)

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Connecting the Serial Cable (Optional) In normal operation, you will not need a serial connection to the Manager port. This connection is used: • to configure your router using the Manager interface if you cannot use Telnet, or •...
  • Page 32 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers If a LNK/ACT LED is lit, a link has been established to the connected device. If a LOCAL port is connected to a 100 Mbps device, verify that the 100 LED is lit.

  • Page 33: Preparing Your Network

    This chapter describes the preparation for connecting your PCs to the Internet using the Model RT311 or RT314 Internet Access Gateway Router. Before configuring your router, you must perform the following tasks: • Configure your PCs for using the TCP/IP networking protocol •...

  • Page 34: Configuring Windows 95 Or Windows 98 For Ip Networking

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers In your IP network, all PCs and the router must be assigned IP addresses. Each PC must also have certain other IP configuration information such as a subnet mask (netmask), a domain name server (DNS) address, and a default gateway address.

  • Page 35: Figure 3-1. Network Dialog Box-Network Components List

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Figure 3-1. Network Dialog Box If you need the adapter: Click on the Add button. Select Adapter, and click on Add again. Select the manufacturer and model of your Ethernet adapter, and click on OK.

  • Page 36: Configuring Tcp/Ip Properties

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Select Client, and then click on Add again. Select Microsoft. Select Client for Microsoft Networks, and click on OK. You need to restart your PC after making these changes.

  • Page 37: Verifying Tcp/Ip Properties

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Verifying TCP/IP Properties After your PC has been configured and rebooted, you can check the TCP/IP configuration using the Windows utility winipcfg.exe (for Windows NT systems, use ipconfig.exe). From the Start button, open the Run window, type winipcfg, and click on OK.

  • Page 38: Account Information

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Account Information Unless these items are dynamically assigned by the ISP, your ISP should give you the following basic information for your account: • An IP address and subnet mask •...

  • Page 39: Sharing The Internet Connection

    Panel. Select TCP/IP and click on Properties. Sharing the Internet Connection The Model RT311 or RT314 Internet Access Gateway Router provides an Internet connection for multiple computer workstations through an external broadband access device (such as a cable modem or DSL modem) that is intended for use by a single workstation. For a single-workstation Internet account, an Internet service provider (ISP) supplies TCP/IP configuration information for one workstation.
  • Page 40 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers • Make one or more computers available for access from the Internet • Create additional static routes • Create filters for incoming or outgoing data traffic The Manager interface is accessible through a serial or a Telnet connection. For instructions on...

  • Page 41: Using Your Browser For Configuring The Router

    Using Your Browser for Configuring the Router This chapter contains information about configuring your Model RT311 or RT314 Internet Access Gateway Router using the router’s browser interface. You can configure your router for basic Internet access using a web browser such as Microsoft Internet Explorer or Netscape Navigator.

  • Page 42: Figure 4-1. Browser-Based Configuration Main Menu

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers If your router password has been previously changed from the factory default of 1234, enter the current password. 6. In the opening screen, shown in Figure 4-1. Browser-based configuration main menu Figure 4-1, select WIZARD SETUP.

  • Page 43: Figure 4-2. Browser-Based Setup Wizard, First Screen

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers In the first Wizard screen, enter your account’s Host Name and Domain Name, as shown Figure 4-2 below: Figure 4-2. Browser-based Setup Wizard, first screen These parameters may be necessary to access your ISP’s services such as mail or news servers.

  • Page 44: Figure 4-3. Browser-Based Setup Wizard, Second Screen

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Click on Next to go to the ISP Parameters screen, shown in Figure 4-3. Browser-based Setup Wizard, second screen This screen determines whether a login program will be run.

  • Page 45: Figure 4-4. Browser-Based Setup Wizard, Third Screen

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers • If RoadRunner provided an authentication server address, enter it as Login Server IP address. Otherwise, leave this field as 0.0.0.0. Not all RoadRunner regions require a login program. If your region does not require a login, leave Service Type as Standard.
  • Page 46 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers WAN MAC address: If your ISP allows access by only one specific PC’s Ethernet MAC address, select "Spoof this PC’s MAC address" and enter the IP address of that •...

  • Page 47: Other Features Of The Browser Interface

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Other Features of the Browser Interface In addition to the Setup Wizard, the browser interface provides a limited amount of status and usage information. From the Main Menu of the browser interface, click on Maintenance to view the System Status screen, shown in Figure 4-5.

  • Page 48: Figure 4-6. Browser-Based Configuration, Router Statistics Screen

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 4-1. Menu 3.2 - System Status Fields Field IP Address IP Subnet Mask DHCP LAN Port IP Address IP Subnet Mask DHCP Click on the “Show Statistics” button to display router usage statistics, as shown in below: Figure 4-6.

  • Page 49: Table 4-2. Router Statistics Fields

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers This screen shows the following statistics:. Table 4-2. Router Statistics Fields Field Description Port The statistics for the WAN (Internet) and LAN (local) ports. For each port, the screen...
  • Page 50 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers 4-10 Using Your Browser for Configuring the Router...

  • Page 51: Using The Manager Interface For Initial Router Configuration

    Using the Manager Interface for Initial Router This chapter contains information about basic configuration for your Model RT311 or RT314 Internet Access Gateway Router using the internal Manager interface. The initial configuration consists of: – accessing the Manager, – naming the router, –...

  • Page 52: Connecting Through A Serial Port

    In order to use the Telnet Protocol, you must know the current IP address of the router. If you do not know the router’s current IP address, you must use a serial connection to assign an IP address. The router is shippped with a default address of 192.168.0.1.
  • Page 53 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Click on OK. The router should respond with a “Password:” prompt. Type the current password to access the Manager interface. The default password is 1234. .When using Telnet, consider the following restrictions: •...

  • Page 54: Using The Manager Interface

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Using the Manager Interface Turning on Power to the Router When power is first applied to the router, several internal tests are performed by the router. Your Internet line is initialized at this time. During the initialization, the start-up display is...

  • Page 55: Figure 5-2. Manager Main Menu

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers To log in to the Manager interface: Press [Enter] when prompted. A login screen is displayed and prompts you to enter a password. Enter the default password 1234 to reach the Main Menu Getting Started 1.

  • Page 56: Navigating The Manager

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Navigating the Manager The Manager is the interface that you use to configure your router. commands that enable you to navigate through the Manager menus. Table 5-1. Manager Menu Commands...

  • Page 57: Table 5-2. Manager Menu Summary

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 5-2. Manager Menu Summary (continued) Number Menu Title Internet Access Setup Remote Node Setup Static Routing Setup SUA Server Setup Filter Set Configuration Set up filters to be used in Menu 3 and Menu 4 to provide security...

  • Page 58: General Setup Menu

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers General Setup Menu The General Setup Menu contains administrative and system-related information, such as the router name. To enter administrative and system-related information: Enter 1 from the Main Menu to display Menu 1 - General Setup, as illustrated in Figure 5-3.

  • Page 59: Wan Setup

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers WAN Setup Menu 2 enables you to configure the 10 Mbps Ethernet port to a broadband modem device, such as a cable or DSL modem. This port is labeled INTERNET on the rear panel of the router.

  • Page 60: Lan Setup

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers LAN Setup Menu 3 enables you to configure the Ethernet LAN parameters, including filters, DHCP, and IP address information. These parameters specify the behavior of the router’s local port.

  • Page 61: Ip Configuration By Dhcp

    Device Filters TCP/IP and DHCP Setup The Model RT311 and RT314 routers have the capability to act as a DHCP server, allowing them to assign IP, DNS, and default gateway addresses to attached PCs or workstations. The assigned default gateway address is the LAN address of the router, as set in the TCP/IP section. Each pool address is tested before it is assigned to avoid duplicate addresses on the LAN.
  • Page 62 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 5-5 lists and describes the fields to use for setting up TCP/IP and DHCP parameters in Menu 3.2. When you finish entering information in all of the fields, press [Enter] at the prompt Press ENTER to Confirm.

  • Page 63: Manager Password Setup

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 5-5. Menu 3.2 - TCP/IP and DHCP Setup Fields (continued) Field RIP Direction RIP Version Multicast Manager Password Setup For security, you should change the Manager password from the default value of 1234.

  • Page 64: Figure 5-6. Menu 23 - System Password

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Menu 23 - System Password Old Password= ? New Password= ? Retype to confirm= ? Enter here to CONFIRM or ESC to CANCEL: Figure 5-6. Menu 23 - System Password Enter your previous system password, and press [Enter].

  • Page 65: Internet Access Configuration

    Using the Manager Interface to Configure the This chapter describes how to configure your Model RT311 and RT314 Internet Access Gateway Routers for Internet access using the internal Manager interface. For information about using the Manager interface, refer to Chapter 5, “Using the Manager Interface for Initial Router Configuration.”...
  • Page 66 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Menu 4 - Internet Access Setup ISP's Name= ChangeMe Encapsulation= Ethernet Service Type= Standard My Login= N/A My Password= N/A Login Server IP= N/A IP Address Assignment= Dynamic...

  • Page 67: Configuration For Local Servers

    Internet. Requested services are identified by port numbers in an incoming IP packet. For example, a packet that is sent to the external IP address of your router and destined for port number 80 is an HTTP (Web server) request, and port 21 is an FTP request. Examples of port numbers are shown at the bottom of Menu 15, although you are not limited to these choices.

  • Page 68: Local Web And Ftp Server Example

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Use Menu 15, SUA Server Setup, to configure the router to forward incoming protocols to IP addresses on your local network based on the port number. In addition to servers for specific protocols, you can also specify a default server to which all other incoming protocols are forwarded.

  • Page 69: Local Game Host Or Videoconference Example

    Some online games and videoconferencing applications are incompatible with NAT. The Model Model RT311 and RT314 routers are programmed to recognize some of these applications and to work properly with them, but there are other applications that may not function well. In some cases, one local PC can run the application properly if that PC’s IP address is entered as the default...

  • Page 70: Figure 6-3. Ip Static Routing Table Example

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Press [Enter]. The command interpreter displays the static IP routing table as shown in the example in Figure 6-3. ras> ip rout stat Dest FF Len Interface 192.168.0.0...
  • Page 71 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Menu 12.1 - Edit IP Static Route Route #: 1 Route Name= ? Active= No Destination IP Address= ? IP Subnet Mask= ? Gateway IP Address= ? Metric= 2...

  • Page 72: Static Route Example

    • Your company’s network is 134.177.0.0. When you first configured your Model Model RT311 and RT314 routers, two implicit static routes were created. A default route was created with your ISP as the gateway, and a second static route was created to your local network for all 192.168.x.x addresses. With this configuration, if you attempt to access a device on the 134.177.0.0 network, your router will forward your request to the...

  • Page 73: Figure 6-5. Static Route Example

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Menu 12.1 - Edit IP Static Route Route #: 1 Route Name= company Active= Yes Destination IP Address= 134.177.0.0 IP Subnet Mask= 255.255.0.0 Gateway IP Address= 192.168.0.10 Metric= 2...

  • Page 74: Dynamic Dns

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Dynamic DNS You can configure your router to register its dynamically assigned IP address with a dynamic DNS service by configuring Menu 1.1, shown in account with either DynDNS.org or DDNS.org. Refer to their websites for more information.

  • Page 75: Configuring Filters

    Windows PC in a file called \windows\services. The Model RT311 and RT314 routers allow you to customize filter sets according to your needs. The following sections describe how to configure the filter sets for your router.

  • Page 76: Configuring A Filter Set

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers When implementing these filter sets, you can link up to four of the filter sets to screen the data packet. Therefore, with each filter set having up to six rules, you can have a maximum of 24 rules active for a single filtering application.

  • Page 77: Figure 7-2. Menu 21.1 - Filter Rules Summary

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers When you have finished filling in the Edit Comments field, press [Enter] at the Press ENTER to Confirm... prompt to confirm your selections, or press [Esc] at any time to cancel your selections.

  • Page 78: Table 7-2. Abbreviations Used If Filter Type Is Ip

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 7-1. Abbreviations Used in Menu 21.1 - Filter Rules Summary (continued) Abbreviation Description Refers to Action Matched. F means to forward the packet, D means to drop the packet, and N means to check the next rule.

  • Page 79: Figure 7-3. Menu 21.1.1 - Tcp/Ip Filter Rule

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Menu 21.1.1 - TCP/IP Filter Rule Filter #: 1,1 Filter Type= TCP/IP Filter Rule Active= Yes IP Protocol= 17 Destination: IP Addr= 0.0.0.0 Source: IP Addr= 0.0.0.0 TCP Estab= N/A...

  • Page 80: Configuring A Filter Rule

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Configuring a Filter Rule You can configure two types of filter rules. Some of the parameters differ depending on the type of rule. When you first enter the filter rule menu, Menu 21.1.1 - TCP/IP Filter Rule is displayed.

  • Page 81: Table 7-4. Tcp/Ip Filter Rule Fields

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 7-4. TCP/IP Filter Rule Fields Field Descriptions Active Make the filter rule active (Yes) or inactive (No). IP Protocol Protocol refers to the IP-specific number of the protocol. The range for the value entered in this field should be between 0 and 255 (for example, 6 refers to the TCP protocol).
  • Page 82 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 7-4. TCP/IP Filter Rule Fields (continued) Field Descriptions TCP Estab This field is dependent upon the IP Protocol field. This field is inactive (N/A) unless the value in that field is 6 (TCP protocol). Determine what type of TCP packets to filter, from the following two options: •...

  • Page 83: Generic Filter Rule

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Generic Filter Rule This section provides information about configuring the protocol-independent parameters for a generic filter rule for your router. Menu 21.1.1 - Generic Filter Rule, press [Enter] at the Press ENTER to Confirm... prompt to confirm your selections.

  • Page 84: Applying A Filter Set

    In the following example, the user specifies that filter sets 1, 3, and 10 are to be applied to packets entering the router from the LAN: Incoming Filter Sets = 1,3,10 In cascading filter sets, you may need to modify all but the last set in order to have each set continue to the next set rather than terminate.

  • Page 85: Default Filters

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Default Filters The Model RT311 router is preconfigured with the three filters shown in and in this section. Filter 1: NetBIOS_WAN The NetBIOS_WAN filter is an IP protocol filter used to prevent the sending of Windows NetBIOS name service packets to the ISP.
  • Page 86 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers 7-12 Configuring Filters...

  • Page 87: System Maintenance

    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.
  • Page 88 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Menu 24 - System Maintenance Enter Menu Selection Number: Figure 8-1. Menu 24 - System Maintenance Enter 1 to display Menu 24.1 - System Maintenance - Status menu Menu 24.1 - System Maintenance - Status...

  • Page 89: Table 8-1. System Maintenance Status

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 8-1 lists the commands used in the System Maintenance - Status menu. Table 8-1. System Maintenance Status Command Field Name Enter 1 Drop WAN Enter 9 Reset counters...

  • Page 90: Terminal Baud Rate

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Terminal Baud Rate You can change the baud rate of the serial Manager connection using Menu 24.2.2 - System Maintenance - Change Console Port Speed. The router supports 9600 (default), 19200, 38400, 57600, and 115200 bits per second (bps) for the serial connection.

  • Page 91: Syslog And Accounting

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Syslog and Accounting Syslog and Accounting can be configured in Menu 24.3.2 - System Maintenance - Syslog and Accounting. Menu 24.3.2 configures the router to send UNIX system logs to another machine.

  • Page 92: Diagnostic Menu

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers • Filter event log • PPP event log Save this menu. To configure the syslogd program on the local host PC: Edit the /etc/syslog.conf file to add the line: local n .*...

  • Page 93: Figure 8-3. Menu 24.4 - System Maintenance - Diagnostic

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Menu 24.4 - System Maintenance- Diagnostic TCP/IP 1. Ping Host 2. WAN DHCP Release 3. WAN DHCP Renewal 4. Internet Setup Test System 11. Reboot System Enter Menu Selection Number: Figure 8-3.

  • Page 94: Back Up And Restore Configuration

    Back Up and Restore Configuration You can save the router configuration settings to a disk as a binary file. You can also restore the settings from the file at a later time. Saving and restoring the router configuration lets you restore the router to working order if the configuration information in the router is lost or damaged.

  • Page 95: Backing Up And Restoring The Configuration Using Ftp

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers The procedure for receiving or sending the configuration file varies depending on the type of terminal software used to access the router. Backing Up and Restoring the Configuration Using FTP To back up or restore the configuration file over the LAN, you must have an FTP client program.

  • Page 96: Updating Router Software Using Ftp

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Note: NETGEAR recommends that you change the Manager port baud rate to 38400 or higher before updating the software using the serial port. Doing so results in an update time of 5 to 10 minutes.

  • Page 97: Command Interpreter Mode

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Command Interpreter Mode To enter the command interpreter mode: • Select option 8 from Menu 24, Maintenance, to enter the command interpreter mode. This mode allows you to diagnose, test, and configure your router using a script or specified set of commands.
  • Page 98 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers 8-12 System Maintenance...

  • Page 99: Troubleshooting

    • Check that you are using the 12 V DC power adapter supplied by NETGEAR for this product. If the error persists, you have a hardware problem and should contact technical support.

  • Page 100: Test Led Never Blinks Or Led Stays On

    — If you are connecting a Model RT311 router directly to a workstation or to the uplink (MDI) port of a hub, use the red crossover cable. — If you are connecting a Model RT311 router to a normal (MDI-X) hub port, use the white straight-through cable.
  • Page 101 Check that an IP address is shown for the WAN Port If 0.0.0.0 is shown, your router has not obtained an IP address from your ISP. If your router is unable to obtain an ISP address from the ISP, the problem may be one of the following: •...

  • Page 102: Troubleshooting A Tcp/Ip Network Using A Ping Utility

    Testing the LAN Path to Your Router You can ping the router from your PC to verify that the LAN path to your router is set up correctly. To ping the router from a PC running Windows 95, Windows 98, or Windows NT: From the Windows toolbar, click on the Start button and select Run.
  • Page 103 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers If the path is not functioning correctly, you could have one of the following problems: • Wrong physical connections — Make sure the Local LNK/ACT LED is on. If the LNK/ACT LED is off, follow the instructions in “LNK/ACT LEDs Not...

  • Page 104: Testing The Path From Your Pc To A Remote Device

    If the path is functioning correctly, replies as in the previous section are displayed. If you do not receive replies: — Check that your PC has the IP address of your router listed as the default gateway. If the IP configuration of your PC is assigned by DHCP, this information will not be visible in the control panel network utility.

  • Page 105: Restoring The Default Configuration And Password

    You can erase the current configuration and restore factory defaults by uploading the utility file romfile0.311, which can be found in the directory in which FirstGear was installed. This file is also available on the NETGEAR Web site. This procedure restores the Manager password to 1234 and sets the Manager baud rate to 9600.

  • Page 106: Using Ftp

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Starting XMODEM upload... From your terminal program, send the binary file romfile0.311 using XMODEM transfer protocol. Wait for the following message: Programming successful... Restart the router. Using FTP To restore the configuration file over the LAN, you must have an FTP client program.

  • Page 107: Networks And Routing Basics

    A router is a device that forwards traffic between networks based on network layer information in the data and on routing tables maintained by the router. In these routing tables, a router builds up a logical picture of the overall network by gathering and exchanging information with other routers in the network.

  • Page 108: Routing Information Protocol

    Information Protocol (RIP). Using RIP, routers update one another periodically and check for changes to be added to the routing table. The Model RT311 and RT314 routers support both the older RIP-1 and the newer RIP-2 protocols. Among other improvements, RIP-2 supports subnet and multicast protocols.
  • Page 109 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Class A Network Class B Network Class C Network Figure 10-1. Three Main Address Classes Class A addresses can have up to 16,777,214 hosts on a single network. They use an 8-bit network number and a 24-bit node number.

  • Page 110: Netmask

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers For each unique value of the network portion of the address, the base address of the range (host address of all zeros) is known as the network address and is not usually assigned to a host. Also, the top address of the range (host address of all ones) is not assigned but is used as the broadcast address for sending a packet simultaneously to all hosts with the same network address.
  • Page 111 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Subnet addressing allows us to split one IP network address into smaller multiple physical networks known as subnetworks. Some of the node numbers are used as a subnet number instead.

  • Page 112: Table 10-1. Netmask Notation Translation Table For One Octet

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Table 10-1 lists the additional subnet mask bits in dotted-decimal notation. To use the table, write down the original class netmask and replace the 0 value octets with the dotted-decimal value of the additional subnet bits.

  • Page 113: Private Ip Addresses

    Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers NETGEAR strongly advises that all hosts on a LAN segment use the same netmask for the following reasons: • So that hosts recognize local IP broadcast packets When a device broadcasts to its segment neighbors, it uses a destination address of the local network address with all ones for the host address.
  • Page 114 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers The router accomplishes this address sharing by translating the internal LAN IP addresses to a single address that is globally unique on the Internet. The internal LAN IP addresses can be either private addresses or registered addresses.

  • Page 115: Mac Addresses And Address Resolution Protocol

    Many of the resources on the Internet can be addressed by simple descriptive names such as www.NETGEAR..com . This addressing is very helpful at the application level, but the descriptive name must be translated to an IP address in order for a user to actually contact the resource. Just as...

  • Page 116: Ip Configuration By Dhcp

    IP addresses, along with other information (such as gateway and DNS addresses) that it may assign to the other devices on the network. The Model RT311 and RT314 routers have the capacity to act as a DHCP server.

  • Page 117: Technical Specifications

    This appendix provides technical specifications for the Model RT311 and RT314 Internet Access Gateway Routers. General Specifications Network Protocol and Standards Compatibility Data and Routing Protocols: Power Adapter North America: United Kingdom, Australia: Europe: Japan: All regions (output): Technical Specifications...
  • Page 118 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Physical Specifications Dimensions: Weight: Environmental Specifications Operating temperature: Operating humidity: Electromagnetic Emissions Meets requirements of: Interface Specifications LAN: WAN: Manager: 253 by 181 by 35 mm 9.95 by 7.1 by 1.4 in.

  • Page 119: Glossary

    10BASE-T IEEE 802.3 specification for 10 Mbps Ethernet over twisted pair wiring. 100BASE-Tx IEEE 802.3 specification for 100 Mbps Ethernet over twisted pair wiring. DHCP See Dynamic Host Configuration Protocol. Dynamic Host An Ethernet protocol that provides a centralized administration point for Configuration assigning network configuration information.
  • Page 120 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers masquerading A technique by which several hosts share a single IP address for access to the Internet. This process is an extension of Network Address Translator (NAT). See also Network Address Translator.
  • Page 121 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers unnumbered links A method of connecting two LANs by way of a WAN, where the two WAN end points do not have their own IP addresses. See wide area network.
  • Page 122 Reference Guide for the Model RT311 and RT314 Internet Access Gateway Routers Glossary...

  • Page 123: Index

    Generic IP 7-4 filters, configuring 7-1 front panel 2-3 FTP 8-9, 9-8 FTP, updating the router software 8-10 gateway 3-7 Gateway IP Address field, Edit IP Static Route menu General Setup menu 5-8 Generic Filter Rule menu 7-9...
  • Page 124 host name 3-6, 5-8 IETF xvii IGMP 5-13 Input and Output Filters field, Ethernet Setup menu 5-11 installation 1-2 Internet, accessing 6-1 IP addresses and NAT 10-7 and the Internet 10-2 assigning 10-2 masquerading 1-3 private 10-7 IP configuration by DHCP 10-10 IP networking for Windows 95 3-2 for Windows 98 3-2...
  • Page 125 Routing Information 1-3, 10-2 support 1-2 publications, related xvii RAS S/W Version, System Maintenance menu 8-3 rear panel 2-4, 2-5 rear panel, RT311 2-4 rear panel, RT314 2-5 RFC xvii RoadRunner 3-5, 6-3 Route Name field, Edit IP Static Route menu 6-7...

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