NETGEAR PS111W manual Subnet Addressing, Example of Subnetting a Class B Address

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NetGear Print Server Manual

Subnet Addressing

By looking at the addressing structures, you can see that even with a Class C address there are a large number of hosts per network. Such a structure is an inefficient use of addresses if each end of a routed link requires a different network number. It is unlikely that the smaller office LANs would have that many devices. You can resolve this problem by using a technique known as subnet addressing. 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. A Class B address gives us 16 bits of node numbers translating to 64,000 nodes. Most organizations do not use 64,000 nodes, so there are free bits that can be reassigned. Subnet addressing makes use of those bits that are free, as illustrated below.

Example of Subnetting a Class B Address

A Class B address can be effectively translated into multiple Class C addresses. For example, the IP address of 172.16.0.0 is assigned, but node addresses are limited to 255 maximum, allowing 8 extra bits to use as a subnet address. The IP address of 172.16.97.235 would be interpreted as IP network address 172.16, subnet number 97, and node number 235. In addition to extending the number of addresses available, subnet addressing provides other benefits. Subnet addressing allows a network manager to construct an address scheme for the network by using different subnets for other geographical locations in the network or for other departments in the organization.

Although the preceding example uses the entire third octet for a subnet address, note that you are not restricted to octet boundaries in subnetting. To create more network numbers, you need only shift some bits from the host address to the network address. For instance, to partition a Class C network number (192.68.135.0) into two, you shift 1 bit from the host address to the network address. The new netmask (or subnet mask) is 255.255.255.128. The first subnet has network number 192.68.135.0 with hosts 192.68.135.1 to 129.68.135.126, and the second subnet has network number 192.68.135.128 with hosts 192.68.135.129 to 192.68.135.254.

•The number 192.68.135.127 is not assigned because it is the broadcast address of the first subnet. And 192.68.135.128 is not assigned because it is the network address of the second subnet.

The table below 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. For instance, to partition your Class C network 204.247.203.0 with subnet mask 255.255.255.0 into 16 subnets (4 bits), the new subnet mask becomes 255.255.255.240.

Netmask Notation Translation Table for One Octet

Number of Bits

Dotted-Decimal Value

1

128

2

192

3

224

4

240

5

248

85

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Contents Installation and Reference For Netgear PS111W Print Sever 2000, 2002 by NETGEAR, Inc. All rights reserved Bestätigung des Herstellers/Importeurs United States 888-NETGEAR Purpose PrefaceAudience Special Message Formats ConventionsRelated Publication Use of Enter, Type, and PressChapter List of FTP Files and Commands Supported by the Print Server Appendix C Config File Features IntroductionFront Panel Front Panel of the Model PS111W Print SeverLabel LEDsLED Descriptions Color Activity DescriptionRear Panel 2Rear Panel of the Model PS111W Print SeverVerifying Package Contents InstallationPreparing the Site Connecting Devices to the Print Server Verifying Power Connecting to the Print Server Configuring Print Server for TCP/IPWeb Management for Print Server Browser Menu selections and Configuration Screens Server StatusConfigure Server System Configuration ScreenConfigure Server Fields Print Server Name Password Confirm Password Enable ProtocolsTCP/IP Configuration Fields TCP/IPApple Talk Configuration Fields AppleTalkRegulatory Domain Station Name WirelessConfiguration fields and buttons Channel NoNetwork Type WEP Data Privacy Fields Stat Associated Wireless Link InfoWireless Link Info Fields Current Channel Current Tx Rate ThroughputPrinter Port Printer PortLogical Printer Logical Port FieldsButtons Reset Microsoft Windows System Printing Printing in WindowsNetgear Print Server Software Installation Print Server InstallationInformation Components Destination Location Page There will be a program group created and shown as below Page Setting Up Your PC to Recognize the Print Server Netgear Print Server software IconNetGear Print Server Manual To set up each PC Click on Next Select the PS111W print server and click on Next Auto-IP 13 Set up TCP/IP for Print Server to get an IP address Wireless Configuration 14 Wireless Configuration Click on Finish Netgear Add Printer Wizard Write Down the Port Name Click on OK19 Epson Spool Manager Queue Setup Window Addport Window Epson ConnectionADD Port Window Write Down the Port NameAdd a printer to your system to print Select Printer Port for Add Printer Wizard22 Find and select the printer port 23 Add Printer Wizard 24 Use Existing Driver for Add Printer Wizard 25 Name Your Printer for Add Printer Wizard 26 Share Printer for Add Printer Wizard If you answer Yes to print a test page, see Figure 29 Completing the Add Printer Wizard Unix Printing Using TCP/IP Assigning an IP Address to the Print Server Using Dhcp Temporary IP Address ResolutionAssigning an IP Address to the Print Server Using BootP Assigning an IP Address to the Print Server Using Rarp Assigning an IP Address to the Print Server Using ARP Arp -s Name 00c002xxyyzz Configuring Your Print Server Using FTP Configuration ExampleFile Name Purpose Mode FTP CommandsFTP Files in the Directory Setting the Print Method LPD Configuration and PrintingSample Commands for Using LPD on System Action Sample CommandSample Commands for Using LPD on BSD ActionPrinting Using DSI Printing Using LPDPrinting Using FTP Socket Number DefinitionsSetting up Print Server for AppleTalk AppleTalk PrintingSetting up Host Computer Using PSTool Utility Sample CONFIG.3P Configuration FilePSTool Utility Config File Entries PSTool Utility Config File FormatEntry inConfig File Description Using Advanced Management Tools Buttons Advanced ButtonBrowse Button System Tab Advanced Print Server ConfigurationField Description System Tab Fields TCP/IP Tab TCP/IP Tab WindowAppleTalk Tab AppleTalk TabLogical Port Tab Logical Port Tab WindowPhysical Port Tab Wireless Tab Physical PortSsid Use the same Channel number Wireless Link Info Link Info ScreenMenu Options Control MenuPrinter Menu Configuring Using IP Setup Help MenuAppendix a Technical Specifications General SpecificationsEN 55 022 Cispr 22, Class B Vcci Class B ITE IP Addresses and the Internet Appendix B Understanding IP AddressesThree Main Address Classes Netmask Netmask Notation Translation Table for One Octet Subnet AddressingExample of Subnetting a Class B Address Number of Bits Dotted-Decimal ValueNetmask Formats Private IP AddressesDotted-Decimal Masklength Address Resolution Protocol IP Configuration by DhcpConfiguration Settings Appendix C Config FileConfig File TCP/IP Settings Parameter and CommandConfig File Line Numbers Logical Printer Line NumbersCreating an Ndps Manager Object Appendix D Using NetWare 5 NdpsOverview Create Ndps Manager Object WindowCreating an Ndps Printer Agent Create Printer Agent WindowWorkstation Configuration Configure Port Handler WindowClick on Close IP Configuration Settings Appendix E IP SetupSetting Recommended Value Appendix F Ascii to Hexadecimal Conversion Table Hexadecimal Value Ascii CharacterNetGear Print Server Manual NetGear Print Server Manual
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