D-Link DES-2212 manual Topology, Network

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closet must be Category 5 certified. Where these blocks do not meet the standard, an upgrade is necessary.

Topology

A Fast Ethernet workgroup is configured in a star topology and is built around a maximum of two repeaters. Each workgroup forms a separate LAN (also known as a segment or collision domain), and these workgroups can be easily interconnected through switches, bridges, or routers to form one LAN large enough to encompass a high-rise building or campus environment. Recent innovations in LAN hub technology such as stackable hubs, coupled with the decreasing cost of switches, bridges, and routers, allow the design of low-cost, efficient Fast Ethernet workgroups and enterprise LANs.

The following factors strongly influence the architecture of Fast Ethernet networks:

♦The EIA/TIA 568 Wiring Standard imposes a 100 meter limit on horizontal runs of twisted-pair cables; that is, connections from the wiring closet to the end-station.

♦Fast Ethernet’s increased operational speed reduces the maximum distance between all elements of the LAN (see below).

♦The EIA/TIA 568 Wiring Standard does not support the use of coaxial cables for horizontal wiring.

Network

Network diameter, which is the distance between two end-stations in the same collision domain, is the primary difference between traditional Ethernet and Fast Ethernet. Due to the increased speed in Fast Ethernet and adherence to the EIA/TIA 568 wiring rules, the network diameter of a Fast Ethernet collision domain is limited to 205 meters; in contrast, the maximum 10BASE-T Ethernet collision domain diameter can be up to 2500 meters.

4	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 Introduction DES-2212 Ethernet/Fast Ethernet SwitchPorts Switching Management100Mbps Fast Ethernet Introduction Cables and Connectors100BASE-TX Technology Overview Topology NetworkHubs Connectivity RulesEthernet Switching Introduction External Features Front PanelExternal Features LED Indicators Rear Panel External Features Page Installation Unpacking the SwitchLocation Installing the SwitchRack 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