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Cabletron Systems NB25 E manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    NB20E and NB25 E TW O POR T ETHERNET BRIDGES USER’S MANU AL CABLETRON SYSTEMS, P.O. BOX 6257, ROCHESTER, NH 03867-6257[...]

  • Page 2

    [...]

  • Page 3

    i NO TICE Cabletron Systems reserves the right to mak e changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes ha ve been made. The hardware, firmware, or softw are described in this manual is subject to change [...]

  • Page 4

    FCC NO TICE ii FCC NO TICE This de vice complies with Part 15 of the FCC rules. Operation is subject to the follo wing two conditions: (1) this de vice may not cause harmful interference, and (2) this de vice must accept any interference recei ved, including interference that may cause undesired operation. WARNING: This equipment uses and generates[...]

  • Page 5

    iii CONTENTS CHAPTER 1 INTRODUCTION 1.1 USING THIS MANUAL ................................................................ 1-1 1.2 GETTING HELP .......................................................................... 1-2 1.3 THE NB20E AND NB25E TWO PORT ETHERNET BRIDGE .... 1-2 1.4 THE BRIDGE FILTERING METHOD .....................................[...]

  • Page 6

    CONTENTS iv[...]

  • Page 7

    1-1 CHAPTER 1 INTR ODUCTION W elcome to the Cabletron Systems NB20E™ and NB25E™ T w o Port Ethernet Bridges User's Manual. W e hav e designed this user’ s manual to serve as a simple installation and reference guide for the NB20E and NB25E, and to explain the capabilities and special features of each indi vidual bridge. W ith the appropr[...]

  • Page 8

    INTRODUCTION 1-2 1.2 GETTING HELP If you need additional support related to the Cabletron Systems NB20E or NB25E T w o Port Ethernet Bridge, or if you hav e any questions, comments or suggestions related to this manual, feel free to contact Cabletron Systems' T echnical Support at: Cabletron Systems Inc. P .O. Box 6257 E. Rochester , NH 03867-[...]

  • Page 9

    INTRODUCTION 1-3 according to the specific needs of a network manager . The network manager's ability to set up parameters within Remote LANVIEW ensures optimal performance for each bridge, and hence, each network. F or example, a netw ork manager can manage and monitor: the flow of traf fic through a bridge, the status of a database, the b[...]

  • Page 10

    INTRODUCTION 1-4 Figure 1-1 Bridging Method In this example, when Node A sends a packet to Node B, the bridge learns Node A ’ s source address and adds the address to the Source Address T able, indicating that the node is on LAN 1. If Node C subsequently sends a packet to Node A, Node A ’ s address will be detected in the Source Address T able [...]

  • Page 11

    INTRODUCTION 1-5 This feature is referred to as Aging T ime. Aging T ime can be altered through Cabletron Systems’ Remote LANVIEW Network Control Management for the Cabletron Systems' NB20E and NB25E. 1.5 MUL TIPLE BRIDGE ENVIR ONMENTS Both the NB20E and NB25E T w o Port Bridges are designed to promote maximum network use in multiple bridge [...]

  • Page 12

    INTRODUCTION 1-6 1.5.2 Primary and Redundant Data Paths T o ensure the integrity of the netw ork, primary data paths through designated bridges, and redundant data paths through alternati ve bridges are determined in each LAN or loop configuration in the network. A LAN segment’ s designated bridge is the bridge in a LAN or loop configuration wi[...]

  • Page 13

    INTRODUCTION 1-7 if all three bridges are on line and Node A sends a packet to Node B. The packet will be forwarded through Bridges 1 and 3, and through Bridge 2, causing the packet to be circulated man y times around the data loop. If Bridge 1 has priority ov er Bridge 2, the Spanning T ree Algorithm will place Bridge 2 in blocking, pre venting th[...]

  • Page 14

    INTRODUCTION 1-8 For further information for refer to the Remote LANVIEW - Network Control Management f or the Cabletron Systems' NB20E and NB25E User's Manual. 1.7 RELA TED MANU ALS The manuals listed belo w should be used to supplement the procedures and other technical data provided in this manual. The procedures will be referenced whe[...]

  • Page 15

    2-1 CHAPTER 2 INST ALLA TION REQUIREMENTS/ SPECIFICA TIONS Before you attempt to install Cabletron Systems' NB20E or NB25E T w o Port Ethernet Bridge, re view the location and hardw are requirements outlined in this chapter . Also refer to the operating specifications and en vironmental requirements that are listed. All conditions, guidelines[...]

  • Page 16

    INST ALLA TION REQUIREMENTS/ SPECIFICA TIONS 2-2 2.3 OPERA TING SPECIFICA TIONS The operating specifications for Cabletron Systems' NB20E or NB25E T wo Port Bridge Series are included in this section. Cabletron Systems reserves the right to change these specifications at an y time without notice. GENERAL Parameter NB20E NB25E Pack et Buffer [...]

  • Page 17

    INST ALLA TION REQUIREMENTS/ SPECIFICA TIONS 2-3 FR ONT P ANEL INDICA TORS ON LINE When lit, this LED indicates the two port bridge is on line and operational (green indicator). ST AND BY When lit, this LED indicates the bridge is not forwarding packets (yello w indicator). NO TE: Ther e is one TRANSMIT , RECEIVE, COLLISION, and POK (Port OK) LED f[...]

  • Page 18

    INST ALLA TION REQUIREMENTS/ SPECIFICA TIONS 2-4 FR ONT P ANEL SWITCHES (cont.) R OO T | / O When the switch is on ( | ), it designates the bridge as the root bridge in the network. A UI POR T (NB20E/NB25E) Interface Connector T ype: 15 position D type receptacle. Pin 1 Logic Ref. Pin 9 Collision - 2 Collision + 10 T ransmit - 3 T ransmit + 11 Logi[...]

  • Page 19

    INST ALLA TION REQUIREMENTS/ SPECIFICA TIONS 2-5 PO WER SUPPL Y REQUIREMENTS Parameter T ypical W orst V alue Case 120V Input V oltage: 120 V 90 to 130 V Input Current NB20E: 0.5 Amps 1.0 Amps NB25E: 0.75 Amps 1.5 Amps Frequency Range: 47 - 63 Hz 220V Input V oltage: 220 V 180 to 264 V Input Current NB20E: 0.25 Amps 0.5 Amps NB25E: 0.375 Amps 0.75 [...]

  • Page 20

    INST ALLA TION REQUIREMENTS/ SPECIFICA TIONS 2-6 SAFETY Designed in accordance with UL478, UL910, NEC 725-2(b), CSA, IEC, TUV , VDE class A. Meets FCC part 15, Subparagraph J, Class A limits. W ARNING : It is the r esponsibility of the person who sells the system of which the NB20E or NB25E will be a part to ensur e that the total system meets allo[...]

  • Page 21

    3-1 CHAPTER 3 INST ALLING THE NB20E OR NB25E BRIDGE This section contains instructions for installing Cabletron Systems' NB20E or NB25E T w o Port Ethernet Bridge, and for preparing the bridge for operation. V erify that all network design guidelines and site requirements listed in Chapter 2, Installation Requirements/ Specifications , are me[...]

  • Page 22

    INST ALLING THE NB20E OR NB25E BRIDGE 3-2 3.2.1 Installing the Rack Mount Brac kets If the NB20E or NB25E will be rack mounted: 1. Remove the four screws (5, Fig. 3-1) holding the four rubber feet to the bridge. This frees the top plastic housing (1) from the bridge. 2. Carefully remove the top plastic housing. 3. Remove the four screws (6) holding[...]

  • Page 23

    INST ALLING THE NB20E OR NB25E BRIDGE 3-3 4. Remove the NB20E or NB25E from the bottom housing. 5. Remove the four screws (2) that secure the cover to the front of the bridge. The screws are located on the left and right sides of the bridge (closest to the front side), two per side. 6. Attach the rack mount brackets (3, 7) using the screws removed [...]

  • Page 24

    INST ALLING THE NB20E OR NB25E BRIDGE 3-4 Figure 3-3 Installation 2. Attach an AUI cable (2, 8) no more than 50 meters in length to each of the transceivers that you connected to each network segment. 3. Connect the AUI cable from the transceiver to the AUI port (4, 5) located on the back panel of the NB20E or NB25E bridge. 3.2.4 Setting The Mode S[...]

  • Page 25

    INST ALLING THE NB20E OR NB25E BRIDGE 3-5 Figure 3-4 Bridge Front P anel 3.2.5 Connecting The NB20E or NB25E T o The P ower Source When installation of the NB20E/NB25E Bridge is complete and the switches hav e been set, connect the bridge to the power source in the follo wing manner: 1. If you have not already done so, plug the power cord (7, Fig. [...]

  • Page 26

    INST ALLING THE NB20E OR NB25E BRIDGE 3-6 The follo wing conditions indicate a problem has been detected with the bridge: • The ON-LINE, ST ANDBY , POR T 1 OK and POR T 2 OK LEDs do not start to flash on po wer up, indicating that the Real T ime Clock has failed. • The ON-LINE, ST ANDBY , POR T 1 OK and POR T 2 OK LEDs do not stop flashing af[...]

  • Page 27

    4-1 CHAPTER 4 TESTING AND LANVIEW This section contains procedures to test the NB20E or NB25E T w o Port Ethernet Bridge after it has been connected to the network. A description of the LANVIEW LEDs, the Forw ard Broadcast, and the Root Switch, is also provided. 4.1 INST ALLA TION CHECK-OUT After the NB20E or NB25E is connected to the network, v er[...]

  • Page 28

    TESTING AND LANVIEW 4-2 5. Using a transceiver (5) and an AUI cable, connect another LAN-MD (4) to the other segment connected to the bridge. 6. Select and run test 4 - NODE on the LAN-MD connected in the previous step. 7. Verify that this test passes. At least 100 packets should be sent and received by the bridge, with no errors. Packets will be s[...]

  • Page 29

    TESTING AND LANVIEW 4-3 ON LINE LED When this green LED is lit, the bridge is on line and operational. The unit has completed a self diagnostics test and is capable of forwarding packets. ST AND BY LED When this yello w LED is lit, the bridge is in the “Stand by” mode and not capable of forwarding packets. NO TE: There ar e separate XMT , RCV ,[...]

  • Page 30

    TESTING AND LANVIEW 4-4 4.4 USING THE ROO T SWITCH In a multiple-bridge en vironment, the Root switch, Figure 4-1, for a particular bridge allo ws the user to set that bridge as the root bridge. Only one bridge can serve as the root bridge in a multiple bridge en vironment, ho we ver . In the e v ent that two bridges hav e been selected as root bri[...]