SMC Networks 48-Port 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 Industry Canada Class a Iii Safety ComplianceWarnhinweis Faseroptikanschlüsse Optische Sicherheit Underwriters Laboratories Compliance StatementWichtige Sicherheitshinweise Germany Table of Contents Troubleshooting A-1 Installing the SwitchMaking Network Connections Cables B-1 Specifications C-1Ordering Information D-1 Glossary Index ViiViii Overview Chapter About Tigerswitch 10/100Rear Panel Switch ArchitectureManagement Options Description of Hardware10BASE-T/100BASE-TX Ports SMC6948L2 LED Status LEDsNetwork Management Module Network Management ModuleVLANs Spanning Tree ProtocolOptional Media Extender Modules Multicast SwitchingTraffic Priority Power Supply Receptacles Optional Redundant Power Unit SMCRPU150WConnectivity Features and BenefitsExpandability Management PerformanceChapter 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 Fiber Optic Cable Distance for 1000BASE-SX Mbps Fast Ethernet Collision Domain Maximum Network Diameter Using RepeatersSMC 3-2 Rule for Class II Repeaters SMC 2-1 Rule for Class I RepeatersSMC 5-4-3 Rule Mbps Ethernet Collision DomainMaximum Ethernet Cable Distance Application Notes Network Planning Selecting a Site Installing the SwitchPackage Contents Equipment ChecklistOptional Rack-Mounting Equipment Rack Mounting MountingAttaching the Brackets Attaching the Adhesive Feet Desktop or Shelf MountingPower Receptacle Connecting to a Power SourceChapter Making Network Connections Connecting Network Devices1. Making Twisted-Pair Connections Connecting to PCs, Servers, Hubs and SwitchesWiring Closet Connections Wiring Closet ConnectionsFiber Optic Devices Making SC Port Connections Making Network Connections Diagnosing Switch Indicators Appendix a TroubleshootingInstallation Power and Cooling ProblemsIn-Band Access Troubleshooting Troubleshooting Appendix B Cables SpecificationsTwisted-Pair Cable and Pin Assignments Figure B-1. RJ-45 Connector Pin Numbers100BASE-TX/10BASE-T Pin Assignments Straight-Through WiringCrossover Wiring Figure B-2. DB-9 Console Port Pin Numbers Console Port Pin AssignmentsConsole Port to 9-Pin COM Port on PC DB-9 Port Pin AssignmentsConsole Port to 25-Pin DCE Port on Modem Console Port to 25-Pin DTE Port on PC Cables Physical Characteristics Appendix C SpecificationsTemperature WeightPower Supply Power ConsumptionSwitch Features Management Features Standards SafetyCompliances EmissionsWarranty 100BASE-FX Extender Module Slide-in Module1000BASE-SX Extender Module ModelSMC6948NMM Appendix D Ordering Information Ordering Information Glossary-1 GlossaryAuto-Negotiation BandwidthGlossary-2 Glossary-3 Glossary-4 Glossary-5 Glossary-6 Index-1 IndexIndex-2 See RPU Index-3Index-4 Page Internet