Nortel Networks 70 Series manual Types of Ethernet Switches

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Installation and Reference for the BayStack 70 Series 10/100 Ethernet Switches

Types of Ethernet Switches

Ethernet switches can be classified as desktop switches or as segment switches. A desktop switch is designed to support one or a few PCs per port. It is generally used when individuals need the full 10 Mb/s network throughput to support their applications. Often, these switches support only a single MAC (media access control) address per port, have high-speed 100 Mb/s ports to connect to high-power servers, and are relatively inexpensive compared to a segment switch. A segment switch, in contrast, is designed to support an entire workgroup on each port, with each port having significant memory buffering and supporting thousands of MAC addresses.

Switches can also be classified by speed. As the name suggests, 10 Mb/s switches support only 10 Mb/s connections. Similarly, 100 Mb/s switches support only 100 Mb/s connections. Some types of 10+100 Mb/s switches have primarily 10 Mb/s ports with one or a few 100 Mb/s ports. Autosensing 10/100 Mb/s switches such as the BayStack 70 Series 10/100 Ethernet Switch support 10 Mb/s or 100 Mb/s connections on each port, and offer great versatility and adaptability.

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Contents Installation and Reference for Copyright 1999 Nortel Networks Iii Restricted Rights Legend Statement of ConditionsNortel Networks NA Inc. Software License Agreement 206375-A Contents Chapter Troubleshooting Figures 206375-A Tables Xii Preface PurposeAudience Hard-Copy Technical ManualsHow to Get Help Technical Solutions Center Telephone NumberPage BayStack 70 Series 10/100 Ethernet Switches Overview Chapter IntroductionPhysical Description Front PanelFront Panel of the BayStack 70-8T 10/100 Ethernet Switch RJ-45 10BASE-T/100BASE-TX Ethernet Ports LEDs Description of Switch and Port Status LEDs Type Label Color Activity DescriptionRear Panel of the BayStack 70-24T 10/100 Ethernet Switch DC Power Adapter Features MAC Address QuantitiesModel MAC Addresses in Information Table Buffer Sizes Model Buffer SizeExternal Power Adapters Model External Power AdapterPage Chapter Network Configuration Benefits of Using Switching TechnologyTypes of Ethernet Switches Desktop Switching BeforeSegment Switching Before After Extending a Network Bridging from 10BASE-T to 100BASE-TX Networks Bridging 10 Mb/s Networks to 100 Mb/s NetworksPower Workgroups Power Workgroup ConnectionsChapter Installation Package ContentsPower Specifications Operating EnvironmentInstalling the Switch Set the switch on a desktop or any other flat surfaceAttach any additional devices to the ports in your switch Connecting Devices to the Switch Installing the Switch in a RackConnecting Power Verifying Installation Checking the Diagnostic Displays BayStack 70-24T 10/100 Ethernet Switch LED DisplayDescription of Switch and Port Status LEDs Page Chapter Troubleshooting Using the LED DisplayPage Appendix a Technical Specifications Product SpecificationsTable A-1 Technical Specifications Physical Specifications Environmental SpecificationsElectromagnetic Emissions Safety Agency Approvals Performance SpecificationsElectromagnetic Susceptibility Page 10BASE-T/100BASE-TX UTP Cable Appendix B Cables and ConnectorsTable B-1 RJ-45 Connector Pin Assignments RJ-45Straight-Through and Crossover Cables Figure B-1. Straight-Through Twisted-Pair CableIndex NumbersIndex-2