SMC Networks SMCBGLLCX1, SMCRPS600W* manual Chapter Network Planning, Introduction to Switching

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CHAPTER 2

NETWORK PLANNING

Introduction to Switching

A network switch allows simultaneous transmission of multiple packets via non-crossbar switching. This means that it can partition a network more efficiently than bridges or routers. The switch has, therefore, been recognized as one of the most important building blocks for today’s networking technology.

When performance bottlenecks are caused by congestion at the network access point (such as the network card for a high-volume file server), the device experiencing congestion (server, power user or hub) can be attached directly to a switched port. And, by using full-duplex mode, the bandwidth of the dedicated segment can be doubled to maximize throughput.

When networks are based on repeater (hub) technology, the maximum distance between end stations is limited. For Ethernet, there may be up to four hubs between any pair of stations; for Fast Ethernet, the maximum is two. This is known as the hop count. However, a switch turns the hop count back to zero, so subdividing the network into smaller and more manageable segments, and linking them to the larger network by means of a switch, removes this limitation.

A switch can be easily configured in any Ethernet or Fast Ethernet network to significantly boost bandwidth while using conventional cabling and network cards.

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Contents TigerSwitch 10/100 Page TigerSwitch 10/100 Installation Guide Trademarks Limited Warranty Limited Warranty FCC Class a CompliancesEC Conformance Declaration Class a IiiCompliances Industry Canada Class a Underwriters Laboratories Compliance Statement Safety ComplianceWarnhinweis Faseroptikanschlüsse Optische Sicherheit Wichtige Sicherheitshinweise Germany ViiViii Contents Making Network Connections Installing the SwitchContents Xii Overview Chapter About Tigerswitch 10/100Management Options Switch ArchitectureSwitching Method VLANs Spanning Tree ProtocolTraffic Priority Multicast Switching1000BASE-T/SFP Ports Description of Hardware10BASE-T/100BASE-TX Ports Port and System LEDs Status LEDsSystem Status LEDs Power Supply Receptacles Optional Redundant Power UnitConnectivity Features and BenefitsPerformance Management About the Tigerswitch 10/100 Chapter Network Planning Introduction to SwitchingCollapsed Backbone Sample ApplicationsCentral Wiring Closet Central Wiring ClosetRemote Connections with Fiber Cable Collapsed Backbone Using Fiber CableMaking Vlan Connections Making Vlan ConnectionsMbps Gigabit Ethernet Collision Domain Connectivity RulesMaximum Fast Ethernet Cable Distance Mbps Fast Ethernet Collision DomainSMC 3-2 Rule for Class II Repeaters SMC 2-1 Rule for Class I RepeatersMbps Ethernet Collision Domain Maximum Network Diameter Using RepeatersMaximum Ethernet Cable Distance SMC 5-4-3 RuleApplication Notes Network Planning Selecting a Site Installing the SwitchOptional Rack-Mounting Equipment Equipment ChecklistPackage Contents Rack Mounting MountingAttaching the Brackets Attaching the Adhesive Feet Desktop or Shelf MountingPower Receptacle Connecting to a Power SourceChapter Making Network Connections Connecting Network DevicesTwisted-Pair Devices Cabling GuidelinesMaking Twisted-Pair Connections Connecting to PCs, Servers, Hubs and SwitchesWiring Closet Connections Wiring Closet ConnectionsMaking Network Connections Power and Cooling Problems Appendix a TroubleshootingDiagnosing Switch Indicators In-Band Access InstallationAppendix B Cables SpecificationsTwisted-Pair Cable and Pin Assignments Figure B-1. RJ-45 Connector Pin NumbersRJ-45 Pin Assignments 100BASE-TX/10BASE-T Pin Assignments1000BASE-T Pin Assignments Pin MDI Signal Name MDI-X Signal Name1000BASE-T Cable Requirements Cable Testing for Existing Category 5 CableAdjusting Existing Category 5 Cabling to Run 1000BASE-T Console Port to 9-Pin COM Port on PC Console Port Pin AssignmentsDB-9 Port Pin Assignments Console Port to 25-Pin DTE Port on PC Cables Physical Characteristics Appendix C SpecificationsPower Supply TemperaturePower Consumption HumiditySwitch Features Standards Management FeaturesSafety WarrantyCompliances CE Mark EmissionsSpecifications Appendix D Ordering Information Ordering Information Glossary-1 Glossary1000BASE-T Auto-NegotiationGlossary-2 Glossary-3 Glossary-4 Virtual LAN Vlan Glossary-5Transmission Control Protocol/Internet Protocol TCP/IP Glossary-6 Index-1 IndexIndex-2 Index-3 Index-4 Page For Technical SUPPORT, Call