D-Link DSL-500T manual IP Network Classes, Class Beginning Address Ending Address

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DSL-500T ADSL Router User’s Guide

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 Number

Network Addresses (Host

Maximum Number of

 

of Networks in

Portion in Parenthesis)

Hosts per Network

 

Class

 

 

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

 

 

 

 

Note: All network addresses outside of these ranges (Class D and E) are either reserved or set aside for experimental networks or multicasting.

When an IP address's host portion contains only zero(s), the address identifies a network and not a host. No physical device may be given such an address.

The network portion must start with a value from 1 to 126 or from 128 to 223. Any other value(s) in the network portion may be from 0 to 255, except that in class B the network addresses 128.0.0.0 and 191.255.0.0 are reserved, and in class C the network addresses 192.0.0.0 and 223.255.255.0 are reserved.

The value(s) in the host portion of a physical device's IP address can be in the range of 0 through 255 as long as this portion is not all-0 or all-255. Values outside the range of 0 to 255 can never appear in an IP address (0 to 255 is the full range of integer values that can be expressed with eight bits).

The network portion must be the same for all the IP devices on a discrete physical network (a single Ethernet LAN, for example, or a WAN link). The host portion must be different for each IP device — or, to be more precise, each IP-capable port or interface — connected directly to that network.

The network portion of an IP address will be referred to in this manual as a network number; the host portion will be referred to as a host number.

To connect to the Internet or to any private IP network that uses an Internet-assigned network number, you must obtain a registered IP network number from an Internet-authorized network information center. In many countries you must apply through a government agency, however they can usually be obtained from your Internet Service Provider (ISP).

If your organization's networks are, and will always remain, a closed system with no connection to the Internet or to any other IP network, you can choose your own network numbers as long as they conform to the above rules.

If your networks are isolated from the Internet, e.g. only between your two branch offices, you can assign any IP Addresses to hosts without problems. However, the Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of IP Addresses specifically for private (stub) networks:

Class

Beginning Address

Ending Address

A

10.0.0.0

10.255.255.255

 

 

 

B

172.16.0.0

172.31.255.255

 

 

 

C

192.168.0.0

192.168.255.255

 

 

 

It is recommended that you choose private network IP Addresses from the above list. For more information on address assignment, refer to RFC 1597, Address Allocation for Private Internets and RFC 1466, Guidelines for Management of IP Address Space.

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Contents DSL-500T Adsl Router User’s Guide DSL-500T DSL Router User’s Guide FCC WarningWichtige Sicherheitshinweise Warranties ExclusiveHardware SoftwareWarranty and Registration Information for USA Only DSL-500T DSL Router User’s Guide Table of Contents Update Gateway Ping Test OAM Test Installation Requirements About This User’s GuideBefore You Start Ethernet Port NIC Adapter Additional SoftwareAbout Clip Connections RFC Information you will need from your Adsl service provider Information you will need about your LAN or computer What is ADSL? Router Description and OperationRouter Features Standards Compatibility and Compliance Front Panel Display Packing ListRear Panel Connections Power on Router Factory Reset ButtonConnect Adsl Line Hub or Switch to Router ConnectionNetwork Connections Connect Router to EthernetComputer to Router Connection Configuring IP Settings on Your Computer Wan Configuration SummaryConfigure Windows XP for Dhcp DSL-500T Adsl Router User’s Guide Configure Windows 2000 for Dhcp WindowsConfigure Windows ME for Dhcp Windows MEWindows 95 and Windows Configure Windows 95 and Windows 98 for Dhcp Configure Windows NT 4.0 for DhcpWindows NT 4.0 Workstations Access the Configuration Manager Login to HomeConfigure the Router Home Status Information windowSetup Menu Opening Setup windowDSL Modulation Settings DSL Setup menu change modulation typeConfigure Connection 1 for PPPoA PPPoA Connection 1 Setup menuConfigure Connection 1 for PPPoE Change the Connection TypeConfigure Connection 1 for Bridge Setup Configure Connection 1 for Bridge Configure Connection 1 for Static IP for WAN Setup Configure Connection 1 for Static IP for the WANConfigure Connection 1 for Dhcp for WAN Setup Configure Connection 1 for Dhcp service for the WANConfigure Connection 1 for Clip 10. Setup Configure Connection 1 for Clip IPoACreate a New Connection 11. Setup a New Connection Connection New Connection Example 1 Create a New PPPoE Connection12. Setup a New Connection Connection New Connection Example 2 Create a New Bridge ConnectionEnd IP Dhcp Configuration for LANDhcp Parameter Description Start IP Lease TimeEnable Dhcp Relay 14. Configure Dhcp Relay Service15. Configure Management IP Management IPSave Configuration Changes 16. Router Tools Menus17. Available System Commands Advanced Router Management UPnP Advanced UPnP windowLAN Clients Setup LAN ClientsPort Forwarding Advanced Port Forwarding windowApplications Category Available Rules GamesAudio/Video ServersSet up Custom Port Forwarding Rules Port Forwarding User Rules Management Access Control Access Control menuVPN Enable/Disable NAT and Firewall Advanced SecuritySetup Remote Management Bridge FiltersDMZ IP Address Multicast Pass-through 10. Multicast pass-through menuStatic Routing 11. Static Routing menuDynamic Routing 12. Dynamic Routing RIP menuMultiple Virtual Connections Tools and Utility Menus 13. Tools and utility menu linksUser Management 14. User Management menuSystem Function Description Save All System CommandsRestore RestartRemote Log 16. Remote Log menuUpdate Gateway 17. Tools Update Gateway windowPing Test 18. Tools Ping Test windowOAM Test 19. Tools OAM Test windowStatus Menus 20. Status display linksNetwork Statistics 21. Network Statistics windowConnection Status Dhcp ClientsModem Status Product InformationSystem Log Help MenuData Transfer StandardsProtocols RatePhysical and Environmental FCC Class B, CE Class BUsing the Default IP Address Assigning Network IP AddressesManual IP Address Assignment Using Dhcp IP Setup Example #2Changing the IP Address of the Router IP Concepts IP AddressesIP Network Classes Class Beginning Address Ending AddressSubnet Mask IP Class Subnet MaskMicrofilter Installation MicrofiltersLine Splitter Installation Line SplitterPage Offices Japan Link Japan Link U.S.A Registration Card