D-Link DES-2212 manual Ethernet Switching Introduction

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Ethernet Switching Introduction

Another approach to pushing beyond the limits of Ethernet technology is the development of switching technology. A switch bridges Ethernet packets at the lowest (MAC address) level between connected Ethernet or Fast Ethernet LAN segments.

Switching is a cost-effective way of increasing the total network capacity available to users on a local area network. A switch increases capacity and decreases network loading by making it possible for a local area network to be divided into different segments (also called collision domains) which don’t compete with each other for network transmission capacity, giving a decreased load on each.

The switch acts as a high-speed selective bridge between the individual segments. Traffic that needs to go from one segment to another is automatically forwarded by the switch, without interfering with any other segments. This allows the total network capacity to be multiplied, while still maintaining the same network cabling and adapter cards.

For Fast Ethernet networks, a switch is an effective way of eliminating problems of chaining hubs beyond the “two-repeater limit.” A switch can be used to split parts of the network into different collision domains, making it possible to expand your Fast Ethernet network beyond the 205 meter network diameter limit for 100BASE-TX networks. Switches supporting both traditional 10Mbps Ethernet and 100Mbps Fast Ethernet are also ideal for bridging between existing 10Mbps networks and new 100Mbps networks.

Switching LAN technology is a marked improvement over the previous generation of network bridges, which were characterized by higher latencies. Routers have also been used to segment local area networks, but the cost of a router and the setup and maintenance required make routers relatively impractical. Today’s switches are an ideal solution to most kinds of local area network congestion problems.

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Introduction

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Contents Recyclable Wichtige Sicherheitshinweise Warranties Exclusive Limited Warranty Software Trademarks Table of Contents Making Network Connections Product Specifications Page About this Guide Page DES-2212 Ethernet/Fast Ethernet Switch IntroductionPorts Switching ManagementCables and Connectors 100Mbps Fast Ethernet Introduction100BASE-TX Technology Overview Topology NetworkHubs Connectivity RulesEthernet Switching Introduction External Features Front PanelExternal Features LED Indicators Rear Panel External Features Page Installation Unpacking the SwitchInstalling the Switch LocationRack Mounting Connecting Power Replacing the Fuse Making Network Connections 10BASE-T Connection100BASE-T Connection MII Connection Making Network Connections Using the Console Interface Connecting to the SwitchConsole Usage Conventions First Time Connecting To The Switch Super and General User Privileges Steps to create a Super User or General UserMain Menu for General User Super User and General User Privileges Login On The Switch Console By Registered Users Changing your Password Choose Change PasswordAdding and Deleting Users Adding a New UserDeleting a User Setting up the Switch TCP/IP SettingsUsing the Console Interface Out-of-band management and console settings 10. TCP/IP Parameters Configuration MenuSoftware Updates 11. Out-of-Band/Console Setting MenuSnmp Information and Console Timeout 12. Software Update Menu13. System Configuration Menu 14. Snmp Trap Manager Configuration Menu Snmp TrapsSwitch Configuration Snmp Security Community Names16. Port Configuration Menu Controlling Individual PortsForwarding Configuration 17. STA, Forwarding TableUsing the Console Interface Spanning Tree Protocol and Configuration Introduction to Spanning Tree Protocol Parameters Using the Console Interface Setting Spanning Tree Protocol Parameters Using the Console Interface Using the Console Interface Using the Console Interface Monitoring the Switch Displaying Port StatisticsUsing the Console Interface Resetting the Switch System ResetFactory Reset Using the Console Interface Page Product Specifications GeneralEnvironmental and Physical Cables Connectors 10BASE-T/100BASE-TX ConnectorsStraight-through Cable MII Connector Crossover CableMII Connector Pin Assignment RS-232 DB9 Pin Specification E , D BE , D B -2 R 2 Page Boot Configuration File Sysdescr stringSyslocation string Clear-SNMP-comm-table Index IndexSnmp Page Offices Page Registration Card