D-Link DI-206 manual Appendix B IP Concepts, IP Addresses, IP Network Classes

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DI-206 ISDN Remote Router

Appendix B - IP Concepts

This appendix describes some basic IP concepts, the TCP/IP addressing scheme and show how to assign IP Addresses.

When setting up the router, you must make sure all ports to be utilized on the router have valid IP addresses. Even if you will not use the ISDN or WAN ports, you should, at the very least, make sure the LAN port is assigned a valid IP address. This is required for telnet, in-band SNMP management, and related functions such as “trap” handling and TFTP firmware download.

IP Addresses

The Internet Protocol (IP) was designed for routing data between network sites all over the world, and was later adapted to allow routing between networks (often referred to as “subnets”) within any site. IP includes a system by which a unique number can be assigned to each of the millions of networks and each of the computers on those networks. Such a number is called an IP address.

To make IP addresses easy to understand, the originators of IP adopted a system of representation called “dotted decimal” or “dotted quad” notation. Below are examples of IP addresses written in this format:

201.202.203.204 189.21.241.56 125.87.0.1

Each of the four values in an IP address is the ordinary decimal (base 10) representation of a value that a computer can handle using eight “bits” (binary digits — 1s and 0s). The dots are simply convenient visual separators.

Zeros are often used as placeholders in dotted decimal notation; 189.21.241.56 can therefore also appear as 189.021.241.056.

IP networks are divided into three classes on the basis of size. A full IP address contains a network portion and a “host” (device) portion. The network and host portions of the address are different lengths for different classes of networks, as shown in the table below.

Networks attached to the Internet are assigned class types that determine the maximum number of possible hosts per network. The previous figure illustrates how the net and host portions of the IP address differ among the three classes. Class A is assigned to networks that have more than 65,535 hosts; Class B is for networks that have 256 to 65534 hosts; Class C is for networks with less than 256 hosts.

IP Network Classes

Class

Maximum

Network Addresses (Host

Maximum

 

Number of

Portion in Parenthesis)

Number of

 

Networks in

 

Hosts per

 

Class

 

Network

A

126

1(.0.0.0) to 126(.0.0.0)

16,777,214

B

16,382

128.1(.0.0) to 191.254(.0.0)

65,534

 

 

 

 

C

2,097,150

192.0.1(.0) to 223.255.254(.0)

254

96

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Contents DI-206 Isdn Router User’s Guide Page FCC Warning CE Mark WarningHardware Link Offices for Registration and Warranty ServiceSoftware Wichtige Sicherheitshinweise Page Table of Contents Using Telnet 102 101104 Page Introduction Product FeaturesEase of Installation Built-in HubIsdn Leased Line Radius Remote Authentication Dial In User ServiceDhcp Support Dynamic Host Configuration Protocol Standard Phone JacksApplications for your DI-206 What This Manual CoversWhat This Manual Doesn’t Cover Other ResourcesAdditional Installation Requirements Packing ListDI-206 Front Panel InstallationOrdering Your Isdn Line DI-206 Rear Panel Telephone Features Installation and Initial ConfigurationSetting up the Console Connecting the Console to the RouterConnecting a Telephone or Fax Machine to the Router Using the ConsoleConnecting an Isdn Line to the Router Connecting Ethernet Cables to the RouterImportant Notes on Ethernet Connections Device Port Device Being Cable to USE Used Connected TypePowering Up Devices for Initial Configuration Initial Configuration of the RouterConfiguring the LAN Port Choose Network Configuration, IP Configuration Choose Interface Configuration, LANFrom the Main Menu choose Advanced Functions Plugging in All Devices Configuration and Management Console Program Main MenuSystem Information Interface Configuration LAN DI-206 Isdn Remote Router Network Configuration IP Stack Configuration DI-206 Isdn Remote Router DI-206 Isdn Remote Router IP Static Route IP Static Route ExamplesIP Networking Snmp Agent ConfigurationRouter Advertisement Snmp Community Configuration Snmp Trap Manager Configuration Snmp Authenticated TrapAdvanced Functions Remote Access ConfigurationRemote Operation Overview Remote Network Connections DI-206 Isdn Remote Router Dial Configuration Dial-In User Profile DI-206 Isdn Remote Router Phone Number Supplied by Toggle between Router and Caller Remote Network ProfileDI-206 Isdn Remote Router Incoming Dhcp Configuration OutgoingDhcp Server Configuration Dynamic IP PoolDI-206 Isdn Remote Router Static IP Pool Filter Configuration Dhcp Relay AgentConfiguring a Filter Set Filter State of InterfaceLayer 2 Filter IP Filter DI-206 Isdn Remote Router Multiple Home Configuration DI-206 Isdn Remote Router Static ARP NAT Configuration How NAT Works NAT Setting Local IP Addresses Configure NAT/NAPT DI-206 Isdn Remote Router Dynamic NAT Dynamic Napt Static NATConfigure Napt for Special Aps Static NaptDI-206 Isdn Remote Router Telnet/Discovery Enable DNS Configuration Host Table Radius Configuration Multi-Link PPP ConfigurationDI-206 Isdn Remote Router Admin Configuration System Maintenance System StatusCounter StatisticsLAN Counter Table DI-206 Isdn Remote Router Isdn Counter Table Runtime Tables IP Routing Table ARP Table PPP TableLog Configuration Event/Error LogLog and Trace View Log File Trace Buffer Configuration Trace BufferView Trace Buffer Packet Triggered Last CallDiagnostic Connection TestPing Test Loopback TestSystem LAN Software Update System IsdnSystem Restart Factory Reset System Settings Backup/RestoreBackup System Settings Restore System SettingsDI-206 Isdn Remote Router Prom System Configuration System ConfigurationTCP/IP Parameters Configuration System ResetSoftware Update Eeprom Factory Reset Execute BootloadDI-206 Isdn Remote Router Using Telnet via LAN Using TelnetTelnet Configuration Using Telnet via IsdnSystem Timeout Installing a Radius Server Using Radius AuthenticationConfiguring the DI-206 for Radius Authentication Adding Users to the Radius Database Problems With the Isdn Line Appendix a TroubleshootingSome Common Problems With the DI-206 Problems with the LAN InterfaceDI-206 Isdn Remote Router IP Addresses Appendix B IP ConceptsIP Network Classes Subnet Mask IP Protocol Numbers Appendix C IP Protocol and Port NumbersIP Port Numbers Appendix D Technical Specifications GeneralPhysical & Environmental Appendix E Country ID Numbers Appendix F Configuration File Configuration File Example103 Index BAPSee LAN Snmp Offices Registration Card

DI-206 specifications

The D-Link DI-206 is a versatile and reliable networking solution designed to cater to the demands of both home and small office environments. This router is equipped with a range of features and technologies that ensure efficient connectivity and seamless online experiences.

One of the key highlights of the D-Link DI-206 is its robust and user-friendly interface, which is ideal for users of all technical levels. It offers an easy setup process, typically involving a simple web-based configuration that allows users to get their network up and running in no time. The device supports multiple operating modes, including router and access point modes, making it flexible and adaptable to varying networking requirements.

The DI-206 is equipped with dual WAN ports, which provide users with the ability to connect to two separate internet connections. This feature enhances reliability and ensures continuous internet access, as it can automatically switch to a backup connection if the primary line fails. Such redundancy is particularly advantageous for businesses that require uninterrupted connectivity for operations.

In terms of performance, the D-Link DI-206 supports advanced wireless standards, offering data transfer rates that cater to modern bandwidth needs. With dual-band capabilities, it can operate on both 2.4GHz and 5GHz frequencies, allowing users to maximize their wireless coverage while minimizing interference from other devices. This is essential for activities such as streaming, gaming, and video conferencing, where bandwidth demands can be high.

Security is another critical aspect of the D-Link DI-206. It incorporates comprehensive security features, including WPA/WPA2 encryption to protect user data from unauthorized access. Additionally, the router features a built-in firewall and supports VPN passthrough, providing an extra layer of security for users engaging in sensitive online activities.

The DI-206 also offers multiple Ethernet ports for wired connections, enabling users to connect various devices such as computers, printers, and gaming consoles directly to the network. This ensures stable and high-speed internet access for devices that require a consistent connection.

Overall, the D-Link DI-206 stands out as a reliable networking device that combines performance, versatility, and security. Whether for home use or small office environments, it provides an effective solution for users looking to establish a strong and secure network. With its range of features and technologies, the DI-206 is a compelling option for those seeking to enhance their online connectivity and overall experience.
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