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Cabletron Systems user manual NB20E and NB25 E TWO PORT ETHERNET BRIDGES USER’S MANUAL

Models: NB25 E NB20E

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NB20E and NB25 E

NB20E and NB25 E

TWO PORT ETHERNET BRIDGES

USER’S MANUAL

CABLETRON SYSTEMS, P.O. BOX 6257, ROCHESTER, NH 03867-6257

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Cabletron Systems user manual NB20E and NB25 E TWO PORT ETHERNET BRIDGES USER’S MANUAL

Contents

CABLETRON SYSTEMS, P.O. BOX 6257, ROCHESTER, NH NB20E and NB25 E TWO PORT ETHERNET BRIDGES USER’S MANUALPage Copyright May 1990 by Cabletron Systems Inc FCC NOTICE INSTALLATION REQUIREMENTS CONTENTSSPECIFICATIONS INSTALLING THE NB20E OR NB25E BRIDGECONTENTS CHAPTER INTRODUCTION 1.1 USING THIS MANUAL1.3 THE NB20E AND NB25E TWO PORT ETHERNET BRIDGE 1.2 GETTING HELP1.4 THE BRIDGE FILTERING METHOD NODE A Figure 1-1 Bridging MethodNODE C LAN NODE B1.5.1 The Root Bridge 1.5 MULTIPLE BRIDGE ENVIRONMENTSFigure 1-2 Multiple Bridging Environments 1.5.2 Primary and Redundant Data Paths1.6 REMOTE LANVIEW 1.7 RELATED MANUALS 2.1 LOCATION REQUIREMENTS CHAPTER INSTALLATION REQUIREMENTS SPECIFICATIONS2.2 NETWORK REQUIREMENTS INSTALLATION REQUIREMENTS/ SPECIFICATIONS 2.3 OPERATING SPECIFICATIONSFRONT PANEL SWITCHES FRONT PANEL INDICATORSAUI PORT NB20E/NB25E FRONT PANEL SWITCHES contRS232 PORT Parameter POWER SUPPLY REQUIREMENTSTypical WorstSERVICE SAFETYPHYSICAL PROPERTIES 3.2 INSTALLING THE BRIDGE CHAPTER INSTALLING THE NB20E OR NB25E BRIDGE3.1 UNPACKING THE NB20E OR NB25E BRIDGE 3.2.1 Installing the Rack Mount Brackets 3.2.3 Connecting The Bridge To The Network 3.2.2 Cable Support Installation3.2.4 Setting The Mode Switches NB-25E 3.2.5 Connecting The NB20E or NB25E To The Power SourceThe following conditions indicate a problem has been detected with the bridge 4.1 INSTALLATION CHECK-OUT CHAPTER TESTING AND LANVIEWNB-25E 4.2 USING LANVIEW TESTING AND LANVIEW ON LINE LED 4.3 USING THE FORWARD BROADCAST SWITCHSTAND BY LED TRANSMIT XMT LED4.4 USING THE ROOT SWITCH