Compaq Netelligent 2524, Netelligent 2624, Netelligent 3512, Netelligent 3612 User Manual

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Writer: IM Project: Front Notice Comments: 283318-001 File Name:1_notice.doc Last Saved On:11/26/96 5:16 PM
NOTICE
The information in this publication is subject to change without notice. COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR
EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL.
This publication contains information protected by copyright. No part of this publication may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation.
The software described in this guide is furnished under a license agreement or non-disclosure agreement. The software may be used or copied only in accordance with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies.
1996 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.
Compaq
Registered United States Patent and Trademark Office.
Netelligent is a trademark of Compaq Computer Corporation.
Compaq Netelligent 2524/2624 and 3512/3612 100Base-T Repeater
User Guide
First Edition (December 1996)
Part Number 283318-001
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v
Compaq Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: IM Project: Federal Communications Commission Notice Comments: 283318-001
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Federal Communications Commission Notice
Part 15 of the Federal Communications Commission (FCC) Rules and Regulations has established Radio Frequency (RF) emission limits to provide an interference-free radio frequency spectrum. Many electronic devices, including computers, generate RF energy incidental to their intended function and are, therefore, covered by these rules. These rules place computers and related peripheral devices into two classes, A and B, depending upon their intended installation. Class A devices are those that may reasonably be expected to be installed in a business or commercial environment. Class B devices are those that may reasonably be expected to be installed in a residential environment (i.e., personal computers). The FCC requires devices in both classes to bear a label indicating the interference potential of the device as well as additional operating instructions for the user.
The rating label on the device shows which class (A or B) the equipment falls into. Class B devices have an FCC ID on the label. Class A devices do not have an FCC ID on the label. Once the class of the device is determined, refer to the following corresponding statement.
NOTE:
If this equipment contains a Token Ring interface, this equipment is a
Class A digital device when the Token Ring interface is utilized.
Class A Equipment
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at personal expense.
Canadian Notice
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Avis Canadien
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
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Modifications
The FCC requires the user to be notified that any changes or modifications made to this device that are not expressly approved by Compaq Computer Corporation may void the user's authority to operate the equipment.
Cables
Connections to this device must be made with shielded cables with metallic RFI/EMI connector hoods in order to maintain compliance with FCC Rules and Regulations.
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vii
Compaq Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: IM Project: Federal Communications Commission Notice Comments: 283318-001
File Name:2_notice.doc Last Saved On:11/26/96 5:17 PM
European Union (EU) Notice
Compliance with these directives implies conformity to the following European Norms (in brackets are the equivalent international standards):
EN55022 (CISPR 22) - Electromagnetic Interference
EN50082-1 (IEC801-2, IEC801-3, IEC801-4) - Electromagnetic Immunity
UL 1950, Second Edition; CAN/CSA C22.2 No. 950-93; TUV Rheinland EN 60950; and 1988 + A1/1990+A2/1991 - Product Safety
Japanese Notice
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Fiber Port Class 1 Classification
Compaq fiber ports have been tested in accordance with the IEC 825-1 test standard and found to meet the Class 1, intrinsically eye-safe emitter classification.
Product Label
CLASS 1 LED
KLASSE 1 LED
The fiber ports on this product have been tested in accordance with the IEC 825-1 Test Standard and found to meet the Class 1, intrinsically eye-safe emitter classification.
.
Lithium Battery
The non-volatile RAM (NVRAM) chip on the motherboard of the Netelligent 2524/2624 100Base-T repeater contains a non-replaceable lithium battery. Only trained service personnel should dispose of this chip.
La puce mémoire non volatile contient une pile au lithium non remplaçable. L'élimination de cette puce devrait être confieé à un personnel qualifié.
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: Liz Fischer Project: Table of Contents Comments: 283318-001
File Name:2636_t.doc Last Saved On:12/5/96 3:37 PM
Contents
Chapter 1
Overview
Features........................................................................................................................1-1
Package Contents.........................................................................................................1-3
Repeater Components ..................................................................................................1-5
LED Indicators......................................................................................................1-7
Model 2524/2624 LEDs....................................................................................1-7
Model 3512/3612 LEDs....................................................................................1-7
RJ-45 Ports............................................................................................................1-9
Smart Uplink Port (2624 and 3612 Repeaters).....................................................1-9
Serial COM Port (2624 and 3612 Repeaters) ....................................................1-10
Power Supply......................................................................................................1-11
Expansion Interface.............................................................................................1-11
Dip Switches (2524 and 3612 Repeaters)..........................................................1-12
Model 2524 Dip Switches...............................................................................1-12
Model 3612 Dip Switches...............................................................................1-12
Migrating from 10Base-T to Fast Ethernet ...............................................................1-12
Fast Ethernet Repeater Management..........................................................................1-14
100Base-T Repeater Expansion.................................................................................1-15
Expanding 2524 and 2624 Repeaters..............................................................1-15
Expanding 3512 and 3612 Repeaters..............................................................1-15
Extending Your Network with Smart Uplink Modules .....................................1-17
Smart Uplink Configuration Examples...............................................................1-18
Smart Uplink Configuration 1 (Models 2524/2624)...........................................1-19
Smart Uplink Configuration 2 (Models 2524/2624)...........................................1-20
Smart Uplink Configuration 3 (Model 3612) .....................................................1-21
Smart Uplink Configuration 3 (Model 3612) .....................................................1-21
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Smart Uplink Configuration 4 (Model 2624)..................................................1-22
Smart Uplink Configuration 5 (Model 3612)..................................................1-23
Chapter 2
Planning Repeater Installation
Optional Hardware.......................................................................................................2-1
Installation Requirements.............................................................................................2-1
Environmental Requirements................................................................................2-1
Electrical Requirements........................................................................................2-2
Spatial Requirements ............................................................................................2-2
Cable Requirements .....................................................................................................2-3
Understanding Fast Ethernet Cable Budgets.........................................................2-3
Checking Your Cable Budget...............................................................................2-4
Cable Types and Distance Limitations .................................................................2-5
Smart Uplink Port Cable.......................................................................................2-8
Modem Cable........................................................................................................2-8
System Planning Charts ...............................................................................................2-9
Chapter 3
Installing the Repeater
Mounting the Repeater.................................................................................................3-1
Attaching the Rubber Feet ....................................................................................3-1
Rack-Mounting the Repeater ................................................................................3-1
Installing a Smart Uplink Module................................................................................3-3
Inserting the Smart Uplink Module into a 2624/3612 Repeater ...........................3-3
Connecting Twisted-Pair Cable ...................................................................................3-5
Interconnecting Repeaters............................................................................................3-5
Interconnecting 2524/2624 Repeaters...................................................................3-6
2524 Dip Switch Settings..................................................................................3-6
HOST/TARGET............................................................................................3-7
Invalid Connections................................................................................. 3-8
MAN/UNM....................................................................................................3-8
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: Liz Fischer Project: Table of Contents Comments: 283318-001
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Interconnecting 3512/3612 Repeaters.................................................................3-10
Connecting Power......................................................................................................3-11
Disconnecting Power ..........................................................................................3-12
Chapter 4
Repeater Management
Supported MIBs...........................................................................................................4-1
Supported Frame Types ...............................................................................................4-1
NVRAM.......................................................................................................................4-2
SNMP Management.....................................................................................................4-2
IP Support .............................................................................................................4-2
IP Autodiscovery Support.....................................................................................4-3
IPX Support ..........................................................................................................4-3
Configuring the Repeater at Bootup.............................................................................4-4
Using the VT100 Serial Port/Telnet Management Interface........................................4-5
Setting up the Terminal Emulation Program ........................................................4-6
Starting the Management Session.........................................................................4-7
Error Messages..................................................................................................4-8
Navigating Menu Option Screens.........................................................................4-9
Viewing System Information..............................................................................4-10
Viewing the Stack Configuration (Model 3612).................................................4-11
Viewing the Backup Port Configuration.............................................................4-12
Adding a Backup Port Entry ...........................................................................4-12
Deleting a Backup Port Entry..........................................................................4-13
Updating the State of a Backup Port Entry .....................................................4-13
Error Messages................................................................................................4-14
Viewing Port Statistics........................................................................................4-15
Viewing Port Group Statistics.............................................................................4-16
Changing Your Password....................................................................................4-18
Error Messages................................................................................................4-18
Downloading Firmware ......................................................................................4-19
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Error Messages................................................................................................4-20
Setting Up the Modem........................................................................................4-21
Logging Out of the Management Session...........................................................4-22
RMON Support (Model 3612)...................................................................................4-23
Statistics Group...................................................................................................4-23
History Group .....................................................................................................4-23
Alarm Group.......................................................................................................4-24
Event Group........................................................................................................4-24
Intrusion Protection (Model 3612).............................................................................4-25
Changing the Status of a Port..............................................................................4-25
Security...............................................................................................................4-26
Appendix A
Specifications
Physical.......................................................................................................................A-1
Electrical ..................................................................................................................... A-1
Environmental.............................................................................................................A-2
Appendix B
Internal DIP Switch (Models 3512/3612)
Appendix C
Upgrading the DRAM (Model 3612)
Installing a SIMM ....................................................................................................... C-1
Appendix D
Electrostatic Discharge
Glossary
Index
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: Liz Fischer Project: Preface Comments: 283318-001
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Preface
This guide contains information about how to install, operate, and manage the Compaq Netelligent 2524/2624 and 3512/3612 100Base-T repeaters. We recommend that you read all chapters in this guide to become familiar with the repeater's features and to ensure a successful installation.
Intended Reader
This guide is written for network administrators and technicians responsible for hardware installation.
Chapter Organization
The contents of this guide are organized as follows: Chapter 1  Provides an overview of the repeater and describes the repeater's
features and components. Chapter 2  Helps you plan the installation of the repeater. It includes all
repeater installation requirements as well as charts for planning the repeater setup and rack inventory.
Chapter 3  Provides instructions for installing the repeater and a Smart Uplink Module (SUM), and interconnecting repeaters.
Chapter 4  Provides information about in-band and out-of-band repeater management, including SNMP, Telnet, and the VT100 console interface.
Appendix A  Includes the repeater's physical, electrical, and environmental specifications.
Appendix B  Describes precautions to avoid electrostatic discharge that can harm the repeater.
Appendix C  Provides instructions for installing additional DRAM, which allows the repeater to collect a larger number of RMON (3612 model) statistics.
The Glossary Provides definitions for terms related to repeaters, as well as general networking terms.
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1-1
Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
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Chapter 1
Overview
Compaq Netelligent 2524, 2624, 3512, and 3612 100Base-T repeaters are designed to bring reliable 100 Mb/s performance to your desktop. Compaq Smart Uplink technology lets you interconnect managing versions of these repeaters (Models 2624 and 3612) to increase the diameter of your network beyond the normal limitations set by 100Base-T Class 1 specifications. You can also integrate the repeater into your existing 10Base-T network using a switch, bridge, or router. These repeaters offer a wide array of features for a versatile, low-cost stackable repeater solution.
These Netelligent repeaters are available in the following models:
Netelligent 2524 — 24-port unmanaged 100Base-TX repeater (Part Number 267001-001)
Netelligent 2624 — 24-port managing 100Base-TX repeater (Part Number 267000-001)
Model 3512 — 12-port unmanaged 100Base-TX repeater (Part No. 267008-001)
Model 3612 — 12-port managing 100Base-TX repeater (Part No. 267007-001)
Features
These Netelligent repeaters provide these features:
24 RJ-45 ports for 2524/2624; 12 RJ-45 ports for 3512/3612
One Smart Uplink slot for a Smart Uplink module (SUM) and one console port for Telnet and TFTP (Models 2624 and 3612 only)
24 bi-colored LED indicators (12 for Models 3512 and 3612) show port activity, port link, and port disable/auto partition; other LEDs show collisions, the power supply status, and the management status of the repeater
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1-2 Overview
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Smart Uplink capability extends the distance between repeaters to up to 100 meters/328 feet (or 412 meters/1352 feet with fiber). This allows integration of multiple 100 Mb/s repeaters into an existing 100Base-T configuration without normal repeater hop limitations.
TX, FX (ST), and FX (SC) Smart Uplink modules available
Four-group RMON (Remote MONitor) support allows remote diagnostic monitoring via the network management system (Model 3612 only)
Fast Ethernet wiring standards ensure compatibility with all types of UTP cabling
2524/2624 repeaters are stackable up to three units high (as long as the stack contains a 2624 model), providing up to 72 workstation connections. The 3512/3612 repeaters are stackable up to five units high (as long as the stack contains a 3612 model), providing up to 60 workstation connections.
2524/2624 repeaters allow one backplane segment per stack, connected via a backplane connection cable (Part No. 283305-001).
3512/3612 repeaters are segmentable on a per-unit basis; or, by interconnecting repeaters with a FlexPlane backplane connection cable (Part No. 810172-000), all repeaters in a stack can share up to three common backplane segments.
Host/target design allows unmanaged repeaters (Models 2524 or 3512) to be managed by a single managing repeater (Models 2624 or 3612).
2524 and 2624 repeaters provide an internal 110W power supply. 3512 and 3612 repeaters provide redundant hot-swappable load-sharing power supply (90W) capability .
Compaq Netelligent Management Software is included free of charge (2624 and 3612 managing units).
Port intrusion and security support (Model 3612 only)
Rack-mountable chassis
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
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Package Contents
Before you start to install the repeater, verify that the package contains the following items:
Netelligent 2524, 2624, 3512, or 3612 100Base-T repeater
Shielded AC power cord
Rack-mount kit (two side-mounting brackets, eight 3/8-inch bracket screws, and four 1/2-inch rack mount screws)
Four adhesive-backed rubber feet
Compaq Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Compaq Netelligent Management Software CD (with 2624 and 3612 repeaters)
Limited warranty information
The package may contain the following optional items, ordered separately:
Backplane connection cable (for Models 2524 and 2624) or FlexPlane backplane connection cable (for Models 3512 and 3612)
Smart Uplink modules
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Rack-Mounting Brackets
(2624 Only)
(3612 Only)
(2624 Only)
1/2-inch Rack Mount Screws (4)
3/8-inch Bracket Screws (8)
Power Cord
Rubber Feet (4)
COM PORT
COL PWR
HUB STATUS
1 2 3 4 5 6 7 9 10 11 128
13 14 15 16 17 18 19 21 22 23 2420
2524/2624 100Base-T Class I Repeater
3512/3612 100Base-T Class I Repeater
PWR A
BP3
BP2
BP1
COL
PWR B
STATUS
COM PORT
1234567 91011128
XXXXXXXXXXXX
Limited Warranty
Netelligent 2524/2624
and 3512/3612
100Base-T Repeater
User Guide
User Guide
Smart Uplink Modules
Limited Warranty
COLLISION
ACTIVITY
SMARTUP-TX
100BASE-TX
COLLISION
ACTIVITY
TX RX
SMARTUP-FX
100BASE-FX
COLLISION
ACTIVITY
SMARTUP-FXSC
100BASE-FX
100Base-FX (ST)
100Base-FX (SC)
Optional Parts, Ordered Separately
100Base-TX
68-pin
Connectors
2524/2624 Backplane
Connection Cable (P/N 283305-001)
Compaq Netelligent
Management Software CD
(For 2624 and 3612 Repeaters)
Netelligent
Management
Software
3512/3612 FlexPlane Backplane Connector
Figure 1-1. Package Contents
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
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Repeater Components
This section provides a summary of the repeater's components. Figures 1-2 and 1-3 show the repeaters’ front and back panels:
COM PORT
COL
PWR
HUB STATUS
1234 567 91011128
13 14 15 16 17 18 19 21 22 23 2420
2524/2624 100Base-T Class I Repeater
3512/3612 100Base-T Class I Repeater
Smart Uplink Module Port
(Model 2624 only)
Collision, Power Supply,
and Status LEDs
Serial COM Port
(for out-of-band management
and firmware upgrades,
Model 2624 only)
RJ-45 Ports
and Link Status LEDs
PWR A
BP3
BP2
BP1
COL
PWR B
MGMT STATUS
COM PORT
1
23456 7 91011128
XXXXXXXXXXXX
Serial COM Port
(for out-of-band management
and firmware upgrade —
Model 3612 only)
RJ-45 Ports and LEDs
Power Supply A, Power Supply B,
and Status LEDs
Collision, Backplane 1,
Backplane 2, and Backplane 3
LEDs
Smart Uplink Module Slot
Figure 1-2.
Repeater Front Panels
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1-6 Overview
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EXPN PORT BEXPN PORT A
UNM HOST
TARGET
MAN
68-Pin Backplane Connectors
2624 Repeater Back Panel
2524 Repeater Back Panel
3512/3612 Repeater Back Panel
DIP Switch
Factory Default Settings
TARGET/MAN
PWR A
PWR B
UP
DOWN
Main Power Supply Redundant Power Supply Hub Expansion Ports
Figure 1-3. Repeater Back Panels
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
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LED Indicators
The repeater has several LED indicators to help you monitor and manage the repeater. Table 1-1 describes the repeater LEDs.
Model 2524/2624 LEDs
The LEDs on the left side of the front panel indicate the collision status, power supply, and general status of the repeater. The LEDs above each RJ-45 port indicate activity on those ports. When you power on a managing 2624 repeater, it performs a power-on self test (POST). The POST lasts approximately 1 minute. After the POST, all LEDs automatically change to their operational modes.
Model 3512/3612 LEDs
The LEDs on the left side of the front panel indicate the status of both power supplies (PWR A/main and PWR B/redundant) and the general repeater status. The LEDs on the right side of the front panel show the collision status of the repeater and the current backplane selection (1, 2, or 3). The LEDs above each RJ-45 port indicates activity on those ports.
When you power on the managing 3612 repeater, it performs a power-on self test (POST). The POST lasts approximately 1 minute, depending on the amount of DRAM installed in the repeater (see Appendix C “Upgrading the DRAM”). After the POST, all LEDs automatically change to their operational modes.
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1-8 Overview
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Table 1-1
LED Operations and Descriptions (All Models)
LED Status and Meaning
COL (Collision)
Flashing Yellow
Global collisions are occurring anywhere in the repeater's collision domain
OFF No collisions are occurring
RJ-45 Ports
Link Status
Solid Green Successful link test Flashing Green Port activity Solid Yellow Port has been partitioned/disabled OFF Link test failure or no connection to the port.
PWR (Power -
Models 2524
and 2624)
OFF Power is OFF to the repeater. Solid Green Power is ON to the repeater.
PWR A and
PWR B (Power
Supply A/B ­Models 3512
and 3612)
Solid Green Power supply installed and operating properly
Solid Yellow Power supply installed but not operating properly Off Power supply not installed
HUB STATUS
(Models 2524
and 2624)
Unmanaged Repeater (Model 2524)
OFF The repeater is not currently managed; waiting for the 2624 to start. Solid Green The repeater is currently managed. Solid Yellow The repeater is isolated from the backplane or is not in a stack. In a two-repeater
2524/2524 (unmanaged) stack, you have set both repeater dip switches to TARGET or to HOST. In this stack, set one dip switch to TARGET and the other to HOST. Flashing Green The 2524 repeater dip switch is set to UNM, which overrides the non-volatile port enables from the 2624 managing repeater. Reset the 2524 dip switch to MAN.
Managing Repeater (Model 2624)
OFF Basic firmware failure preventing the firmware from functioning correctly Solid Green The repeater successfully finished POST and is ready to manage. Solid Yellow The repeater is booting up and is not ready to manage. Flashing Yellow The POST failed. Flashing Green In a stack with one 2624 managing repeater and one or more 2524 repeaters, you
have set a 2524 repeater dip switch(es) to UNM. This setting overrides the non-volatile port enables from the 2624 managing repeater. Reset the 2524 dip switch(es) to MAN.
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1-9
Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: Chris Seiter/Liz Fischer Project: Chapter 1 Comments: 283318-001
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Table 1-1, continued
STATUS
(Models 3512
and 3612)
Managing Repeater (Model 3612):
Off The repeater is not currently managed by a managing repeater. Solid Green The repeater is currently managed by a managing repeater. Solid Yellow The repeater is currently managed by a managing repeater and has the hardware
override switch enabled. See Appendix B, “Internal Dip Switch.”
Unmanaged Repeater (Model 3512):
Off Basic firmware failure preventing the firmware from functioning correctly Solid Yellow The repeater is booting up and is not ready to manage. Flashing Yellow The POST failed. Solid Green The repeater successfully finished POST and ready to manage. Flashing Green The hardware override switch is enabled and the repeater is ready to manage.
BP1, BP2, or
BP3
(Backplane -
Model 3612)
Green Shows the currently selected backplane Off Shows that the backplane is not currently selected
NOTE: LEDs listed as “Yellow” might appear orange on the front panel.
RJ-45 Ports
The repeater’s RJ-45 ports allow connection to UTP or STP cabling to workstations and servers in a 100Base-T network.
Smart Uplink Slot (2624, 3512/3612 Models)
The Smart Uplink slot houses a Smart Uplink module (SUM), which serves as a connection point between repeaters, repeater stacks, and other manufacturers' 100Base-T repeaters or stacks. Smart Uplink modules let you extend your network without the usual repeater hop limitations inherent with Class I repeaters. Figure 1-4 shows the Smart Uplink modules.
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1-10 Overview
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COM PORT
COL
PWR
HUB STATUS
1234 567 91011128
13 14 15 16 17 18 19 21 22 23 2420
2524/2624 100Base-T Class I Repeater
3512/3612 100Base-T Class I Repeater
Smart Uplink Module Port
(Model 2624 only)
Collision, Power Supply,
and Status LEDs
Serial COM Port
(for out-of-band management
and firmware upgrades,
Model 2624 only)
RJ-45 Ports
and Link Status LEDs
PWR A
BP3
BP2
BP1
COL
PWR B
MGMT STATUS
COM PORT
1
23456 7 91011128
XXXXXXXXXXXX
Serial COM Port
(for out-of-band management
and firmware upgrade —
Model 3612 only)
RJ-45 Ports and LEDs
Power Supply A, Power Supply B,
and Status LEDs
Collision, Backplane 1,
Backplane 2, and Backplane 3
LEDs
Smart Uplink Module Slot
Figure 1-4. Optional Smart Uplink Modules
Serial COM Port (2624 and 3612 Repeaters)
Managing repeaters (Models 2624 and 3612) contain a serial COM port that uses a DB9 connector with a standard AT pinout. This port lets you perform the following operations:
XMODEM Flash (firmware) downloads
VT100 console interface for basic management
SLIP (Serial Line Internet Protocol) transfers, including:
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2624 Model - TFTP Flash downloads
3612 Model - Remote (out-of-band) management (Statistics, History, Alarm, and Event RMON groups) and TFTP Flash downloads
Power Supply
Netelligent 2524 and 2624 repeaters have an internal 110-watt power supply. Netelligent 3512 and 3612 repeaters have a single 90-watt power supply (Part
No. 267322-001). If desired, you can purchase another power supply and operate the repeater in a redundant power supply configuration. The 3512 and 3612 repeaters have two power supply bays on the back panel. The left bay houses the main power supply (A); the right, the redundant power supply (B).
100-240 VAC, 3A-1.5A,50/60 HZ
Figure 1-5.
90-Watt Power Supply (Models 3512/3612)
PWR A
PWR B
UP
DOWN
Main Power Supply Redundant Power Supply
Figure 1-6.
Power Supply Bays (Models 3512/3612)
Expansion Interface
The back panels of the repeaters have expansion interfaces to interconnect the repeaters in managed and unmanaged stacks. These are described in the “100Base-T Repeater Expansion” section in this chapter.
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Dip Switches (Models 2524 and 3512/3612)
The repeaters contain two external (Model 2524) or four internal (Models 3512/3612) dip switches. The functions of these switches, which differ for each model, are briefly described below. For more information about the 2524 dip switch settings, see “Dip Switch Settings” in Chapter 3; for information about the 3512/3612 dip switch settings, see Appendix B.
CAUTION:
Remove power from the repeater before you set the dip switch.
Model 2524
The 2524 repeater back panel has two dip switches. These come factory preset so that you can connect one or two 2524 repeaters to a 2624 managing repeater for a three-repeater managed stack of 72 ports. Or, you can reset the dip switches to interconnect two 2524 repeaters in an unmanaged stack.
Model 3512/3612
The 3512/3612 repeater contains an internal dip switch accessible through the Power Supply A or B opening on the back of the unit. If management is not available for the repeater, you can isolate the repeater's collision domain from the other repeaters in the stack by setting the dip switch. Use the dip switch for the 3612 repeater only when all other configuration methods are unsuccessful.
Migrating from 10Base-T to Fast Ethernet
Fast Ethernet (100Base-T) has evolved from standard Ethernet (10Base-T). Therefore, migrating to Fast Ethernet is fairly simple. Consider the following three suggestions as you incorporate Fast Ethernet into your network:
Purchase dual-speed Network Interface Controllers (NICs) from this point forward. These NICs operate at 10 Mb/s or 100 Mb/s, so you can use them with your 10Base-T repeaters now and continue to use them when you decide to buy 100Base-T equipment.
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Verify that any fiber runs you plan to use at 100 Mb/s meet the distance limitations discussed in the “Cable Requirements” section in Chapter 2, “Planning Repeater Installation.”
Change 100Base-TX repeaters and reconnect the dual-speed NICs to these repeaters. Interconnect the 10 Mb/s and 100 Mb/s networks using a server, dual-speed switch, or a router.
Figure 1-7 shows an example of a network configuration that incorporates both 10Base-T and Fast Ethernet equipment, using a 2624 100Base-TX repeater.
Figure 1-7. Integrating Fast Ethernet with 10Base-T
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Fast Ethernet Repeater Management
Netelligent 2624 and 3612 repeaters contain a Management Daughtercard (MDC100) that provides SNMP management through both in-band and out-of­band communications. The 2624 uses a host/target management architecture. The 3612 repeater uses a host/target management architecture in conjunction with the repeater hardware to provide four-group RMON support (Statistics, History, Alarm, and Event) in a stack of 100Base-T repeaters.
In addition to normal repeater operation, both managing repeaters (2624 and
3612) provide in-band and out-of-band management through a dedicated local MAC port and the front panel DB9 COM port, described as follows:
In-band (or out-of-band via SLIP): SNMP, RMON (Model 3612), Telnet console, and TFTP download
Out-of-band via VT100 interface: Same console as Telnet and firmware upgrades
You can perform the following operations through the Compaq Netelligent Management Software or other network management application:
Both 2624 and 3612 Models
Enable or disable ports
Monitor port link status, port partition/enable status, and port statistics
Model 3612
Select the backplane
Enable port intrusion security
Model 2624
Set backup port configuration
NOTE: The repeater retains most configuration settings when powered down and automatically re-initializes during the power-up cycle.
For more information about the repeater's management capabilities, see Chapter 4, “Repeater Management.”
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100Base-T Repeater Expansion
Netelligent 2524/2624 and 3512/3612 repeaters have expansion interfaces on their back panels to allow the interconnection of repeaters within a stack.
Expanding 2524 and 2624 Repeaters
The 2624 repeater has an expansion interface on the repeater's back panel containing two 68-pin external backplane connectors. These are labeled EXPN PORT A and EXPN PORT B. The 2524 repeater has one 68-pin external backplane connector (EXPN PORT) and a dip switch to change from UNM/HOST or MAN/TARGET.
You can achieve both management and Ethernet expansion by connecting either EXPN PORT (A or B) of a 2624 repeater to the EXPN PORT of one or two 2524 repeaters using an external backplane connector (Part No. 283305-001). You can also create an unmanaged stack of two 2524 repeaters using an external backplane connector between the EXPN PORTs. In this scenario, you must set the dip switch on one repeater to HOST and the other to TARGET.
Expanding 3512 and 3612 Repeaters
Netelligent 3512 and 3612 repeaters have an expansion interface on the repeater's back panel that consists of two 100-pin connectors. These are labeled UP and DOWN. You can achieve both management and Ethernet expansion by connecting the UP connector of a lower repeater to the DOWN connector of an upper repeater using a FlexPlane backplane connection cable (Part No. 810172-000).
A FlexPlane interconnection is shown in Figure 1-8.
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PWR A
PWR B
UP
DOWN
PWR A
PWR B
UP
DOWN
FlexPlane
Connector
100-240 VAC, 3A-1.5A,50/60 HZ
100-240 VAC, 3A-1.5A,50/60 HZ
100-pin Connectors
Figure 1-8. FlexPlane Interconnection
Management Expansion
The FlexPlane connector includes a management bus that enables one managing repeater to manage all other unmanaged 100Base-T repeaters in a stack. All internal stack management is out-of-band so that there is no impact on your network traffic.
Ethernet Expansion
The FlexPlane connector provides three Fast Ethernet backplane segments that let you segment a stack of repeaters into three vertical collision domains (Figure 1-9). You can also segment repeaters on an individual basis.
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Backplane
Segment
213
100Base-T Repeater Stack
Figure 1-9. Expansion via Three Backplane Segments (3512/3612 Units)
Extending Your Network with Smart Uplink Modules
A Netelligent Smart Uplink module lets you integrate multiple repeaters into a 100Base-T configuration without the usual repeater hop limitations inherent with Class I. Smart Uplink modules use a special buffer to isolate collisions between segments. In effect, this buffer restarts the repeater count and distance measurement each time a transmission passes through the Smart Uplink module.
A Smart Uplink module is up to 20 times faster than a Fast Ethernet bridge and up to 200 times faster than an Ethernet bridge. This enhanced speed allows network transmissions to pass through multiple Smart Uplink modules without significantly reducing throughput.
Other features of the Smart Uplink module are described below:
Supports multiple repeater hops
IEEE 802.3u standards compliant (non-proprietary) uplinks to any available TX, FX (ST), or FX (SC) repeater port
SUM Connector Part Number
TX 267042-001
FX (ST) 267043-001
FX (SC) 267045-001
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Supports up to 412 meter (1352 feet) fiber uplinks between stacks when a Smart Uplink module is used at each end
Connection to repeaters in
different
repeater stacks, allowing Ethernet
traffic to all stacks
IMPORTANT: Do not connect a Smart Uplink module to ports in the same stack. Excessive collisions will occur that will greatly reduce network operations.
The 2624 repeater
cannot
manage repeater stacks that are connected via Smart
Uplink modules.
NOTE: The maximum number of Smart Uplink modules depends on your specific network application. Neither the 100Base-T repeaters nor the Smart Uplink module has characteristics that limit the number of Smart Uplink modules that can exist in a single collision domain.
Smart Uplink Configuration Examples
The following three illustrations show sample network configurations using one or more Smart Uplink modules installed in 2624 and 3612 repeaters.
Configuration 1 (Figure 1-10) shows Smart Uplink modules in a 100Base-FX environment (Model 2524/2624).
Configuration 2 (Figure 1-11) shows Smart Uplink modules with 100Base-TX repeaters (Model 2524/2624).
Configuration 3 (Figure 1-12) shows SUMs with 100Base-TX and 100Base-T4 repeaters (Model 3612).
Configuration 4 (Figure 1-13) shows Smart Uplink modules in a hierarchical environment (Model 2624).
Configuration 5 (Figure 1-14) shows Smart Uplink modules in a hierarchical environment (Model 3612).
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Smart Uplink Configuration 1 (Models 2524/2624)
Figure 1-10.
Smart Uplink in a 100Base-FX Environment (Model 2624)
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Smart Uplink Configuration 2 (Models 2524/2624)
Figure 1-11.
Smart Uplink with 100Base-TX (Models 2524/ 2624)
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Smart Uplink Configuration 3 (Models 3512/3612)
100 m
100 m
100Base-TX Repeater
100Base-TX Smart Uplink
Module
100Base-TX Smart Uplink
Module
100Base-T4 Smart Uplink
Module
100Base-TX Repeaters
100Base-T4 Repeaters
100Base-TX and 100Base-T4 Repeaters
100 m
100 m
100 m
100 m
100 m
100 m
100 m 100 m
TX Workstation
TX Workstation TX Workstation
T4 WorkstationTX Workstation
TX TX TX
TX
T4
T4 Workstation
T4 Workstation
Figure 1-12.
Smart Uplink with 100Base-TX and 100Base-T4 (Models 3512/3612)
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Smart Uplink Configuration 4 (Model 2624)
Figure 1-13.
Smart Uplink in a Hierarchical Environment (Model 2624)
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Smart Uplink Configuration 5 (Models 3512/3612)
100 m
100 m
100 m
100 m
100 m
TX Workstation TX Workstation TX WorkstationTX Workstation
100 m
100 m
3512 100Base-TX
Repeater
100Base-TX
Smart Uplink Module
100Base-TX
Smart Uplink Module
100Base-TX
Smart Uplink Module
3512 100Base-TX
Repeater
100Base-TX Repeater
3512 100Base-TX
Repeater
Figure 1-14.
Smart Uplink Modules in a Hierarchical Environment (Models 3512/3612)
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Chapter 2
Planning Repeater Installation
This chapter contains information that will help you prepare for installing the repeater. This includes optional hardware, installation requirements, cable requirements, and system planning charts.
Optional Hardware
Along with the supplied hardware, your network installation might also require the following optional items:
Backplane cable (2524/2624)
FlexPlane connector (3512/3612)
Smart Uplink modules (SUMs)
Redundant power supply (3512/3612)
Installation Requirements
To help ensure a correct installation, read this section to determine the hardware, environmental, electrical, and spatial requirements.
Environmental Requirements
Be sure the operating environment for the repeater is within the following ranges:
Temperature: 32° to 104° F (0° to 40° C)
Humidity: 5% to 95% (non-condensing)
Altitude: 0 to 10,000 feet (0 to 3 km)
Clearance: minimum of 2 inches (5.1 centimeters) on each side of the repeater to allow for proper ventilation
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Electrical Requirements
The electrical requirements for a repeater are as follows:
Voltage: 100 to 240 VAC
Power:
2524/2624 - 1.7A (@ 100 VAC) to 0.65A (@ 240 VAC)
3512/3612 - 1.5A (@ 100 VAC) to 0.90A (@ 240 VAC)
Frequency: 50 to 60 Hz
CAUTION: The power outlet must be a non-switched, grounded power source. Do not use a three-to-two pronged adapter at an outlet. Doing so may result in electrical shock and/or damage to the repeater and will void your warranty.
NOTE: The repeater comes with a shielded AC power cord. If you lose or damage the supplied shielded power cord, replace it with a shielded power cord that meets local regulatory requirements to ensure emissions compliance.
Spatial Requirements
The repeater's dimensions (HxWxD) are as follows:
2524/2624: 2.60 x 17.00 x 13.65 inches (6.7 x 43.6 x 35.0 cm)
3512/3612: 1.75 x 17.00 x 13.65 inches (4.5 x 43.6 x 35.0 cm).
You can interconnect up to three 2524/2624 repeaters in one stack and up to five 3512/3612 repeaters in a stack. Be sure to allow at least 2 inches (5.1 centimeters) on each side of the repeater for proper air circulation and cable connections.
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Cable Requirements
This section defines the requirements for cable used to connect the RJ-45 ports, the Smart Uplink port, and the serial COM port. (Remember that the serial COM port is only on Models 2624 and 3612.)
Understanding Fast Ethernet Cable Budgets
A cable budget is the overall length of cable allowed between two DTEs (data terminal equipment, such as a PC) in a single network segment. With Fast Ethernet, the cable budget is affected by the type of network media between two DTEs and the class of repeater used. The Netelligent 2524/2624 and 3512/3612 100Base-TX repeaters are Class I repeaters.
Fast Ethernet uses Ethernet's CSMACD protocol. Therefore, the cable budget is based on the time it takes for part of an Ethernet packet to reach one end of the network and for notification of an error (a collision) to return before the entire packet is generated. This period is called the propagation delay.
Figure 2-1.
Propagation Delay
Fast Ethernet transmits packets ten times faster than Ethernet. To compensate for this timing difference, Fast Ethernet allows fewer repeaters per segment than 10Base-T and allows a shorter distance between repeaters.
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Checking Your Cable Budget
The following sections state the cabling distance limitations, cable budget, for 100Base-TX and 100Base-FX. However, if your particular network installation deviates from these examples, use the following guidelines to check your DTE­to-DTE cable budget:
Locate the longest DTE-to-DTE cable run and add the lengths of all the cables (UTP and/or fiber) between the two DTEs.
Find the appropriate cable budget in the table below and verify that the cable length for your installation is less than or equal to the table entry.
If the cable run you chose contains fiber, locate the longest DTE-to-DTE run in your installation that consists of only UTP cable and check its cable budget, as well.
NOTE: Cable budgets apply only to DTE-to-DTE cable runs that are directly connected to or that pass through repeaters. If a Smart Uplink module, bridge, switch, or router exists between the DTEs, the cable budget restarts when the transmission passes through any of these devices.
Table 2-1 shows the maximum total length of cable allowed between any two DTEs in a segment. (Information in this table was extracted from Table 29-2 of the IEEE 802.3u specification.)
Table 2-1
Table of Maximum Cable Budgets in Meters (Feet in Parenthesis)
Connection Type
TX Only Fiber Only Fiber TX and Fiber
Direct
100 (328) 412 (1352) N/A N/A
One Class I Repeater
200 (656) 272 (892) 231 (758) 261 (856)
One Class II Repeater
200 (656) 320 (1050) 204 (669) 309 (1014)
Two Class II Repeaters
205 (673) 228 (748) 236 (774) 216 (709)
NOTE: A UTP cable should never exceed 100 meters (328 feet) in length.
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Cable Types and Distance Limitations
The following information states the required cable type and distance limitations for 100Base-TX and 100Base-FX Fast Ethernet.
100Base-TX
100Base-TX is the IEEE 802.3u specification for transmitting 100 Mb/s Fast Ethernet over two pairs of copper wire. The pinout, connectors (RJ-45 modular plugs), and protocol (CSMA/CD) are exactly the same as for 10Base-T.
Unshielded Twisted Pair (UTP)
Category 5 only
Two pairs used (same as 10Base-T)
Maximum 100-meter (328-foot) link
Shielded Twisted Pair (STP)
Two pairs used (same as 10Base-T); other two pairs must be terminated
Distance Rules
One repeater hop per segment (because the repeater is a Class I repeater)
Collision domain diameter (total allowable distance end-to-end) is 200 meters (656 feet)
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Figure 2-2 shows the maximum cable distance for a DTE-to-DTE connection with one repeater in the configuration using 100Base-TX cabling.
Figure 2-2. DTE-to-DTE 100Base-TX Connection
Figure 2-3 shows a one-to-one cable pinout for 100Base-TX.
TX+
TX+
TX-
TX-
RX+
RX+
RX-
RX-
DTE Repeater
1
8
1
8
Figure 2-3. One-to-One Cable Pinout for 100Base-TX
NOTE:
To prevent potential electromagnetic interference, terminate the unused
wires (4, 5, 7, and 8).
Figure 2-4 shows the crossover cable pinout for 100Base-TX.
Figure 2-4. Crossover Cable Pinout for 100Base-TX
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100Base-FX
100Base-FX is the IEEE 802.3u specification for transmitting 100 Mb/s Fast Ethernet over two strands (one pair) of fiber optic cable.
Cable Type
Fiber optic
Multi-mode 62.5/125 to 100/150 micron fiber
Both strands used
Media Connection Options
FX(ST) type (Part Number 267042-001)
FX(SC) type (Part Number 267043-001)
Distance Rules
One repeater hop per segment
Collision domain diameter (total allowable distance end-to-end) is 272 meters (892 feet)
Figure 2-5 shows the maximum cable length for an FX SUM-to-FX SUM fiber connection (412 meters, 1352 feet).
Figure 2-5. FX SUM-to-FX SUM (Fiber) Connection
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Figure 2-6 shows the maximum cable distance for a DTE-to-DTE connection with one repeater in the configuration using 100Base-FX cabling.
Figure 2-6. DTE-to-DTE 100Base-FX Connection
Smart Uplink Port Cable
The Smart Uplink module requires the following types of cable:
TX Type (Part Number 267045-001) Standard 4-wire twisted-pair (UTP or STP), Category 5
FX (ST) Type (Part Number 276042-001) Multi-mode 62.5/125 micron fiber
FX (SC) Type (Part Number 267043-001) Multi-mode 62.5/125 micron fiber
Modem Cable
You can use a standard EIA RS-232 cable to connect the serial COM port, located on the front panel of the managed 100Base-T repeater (Models 2624 and 3612), to a modem. This lets you perform out-of-band management and Flash (firmware) downloads via a remote dial-up to the modem. When you connect a PC to the serial interface for local management, you must use an EIA RS-232 null modem cable.
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System Planning Charts
The charts in Figures 2-7, 2-8, and 2-9 provide a convenient way of planning the connections for your repeater.
Port Connects To
1
2 3 4
5
6
7
8
9 10
11
12
Uplink
Module
2524/2624 Repeater Setup and Cabling Chart
Unit Number Building Location
Rack Mount Table Mount
MAC Address IP Address
Installed Uplink Module
None TX FX (ST Type) FX (SC Type)
Date
18
17
1615
14
13
21
20
19
24
23
22
Figure 2-7.
2524/2624 Repeater Setup and Cabling Chart
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3512/3612 Repeater Setup and Cabling Chart
Port Connects To
1 2 3
4 5
6
7
8 9 10 11 12
Uplink
Module
Unit Number Building Location
Rack Mount Table Mount
MAC Address IP Address
Installed Redundant Power Supply Module
Installed Uplink Module
None TX FX (Fiber)
Date
Figure 2-8. 3512/3612 Repeater Setup and Cabling Chart
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Figure 2-9. Rack Inventory Chart
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: Liz Fischer Project: Chapter 3 Comments: 283318-001
File Name:2636_3.doc Last Saved On:12/19/96 5:03 PM
Chapter 3
Installing the Repeater
This chapter explains how to mount the repeater, attach cables, install a Smart Uplink module, and interconnect repeaters. The illustrations in this chapter show a 2624 repeater, but the procedure for installing the 2524/2624 and 3512/3612 repeaters is the same.
Mounting the Repeater
You can place the repeater on a level surface (table top or shelf, for example) or mount it in a standard EIA 19-inch rack.
Attaching the Rubber Feet
If you will place the repeater on a table top or shelf, attach the supplied adhesive-backed rubber feet as described in the following steps.
1. Turn the repeater over so that the bottom side is up.
2. Remove the four rubber feet from their packaging.
3. Peel the protective paper backing off the rubber feet. Then position the feet near the corners of the repeater and press the feet into place.
4. Turn the repeater to its upright position and place it on the mounting surface.
NOTE: Be sure to allow at least 2 inches (5.1 cm) on each side of the repeater for proper air flow.
Rack-Mounting the Repeater
To mount the repeater in a rack, use the supplied mounting brackets, 3/8-inch bracket screws, and 1/2-inch rack-mount screws.
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To rack mount the repeater, follow these steps:
1. Position the right bracket as shown in Figure 3-1 and attach it to the repeater using four of the smaller, 3/8-inch bracket screws. Then tighten the screws. Repeat this step to attach the left mounting bracket.
Figure 3-1. Attaching the Mounting Brackets
2. After you attach both mounting brackets, position the bracket slots over
the desired holes on the rack (Figure 3-2). Then insert and tighten the four 1/2-inch rack-mount screws.
Figure 3-2. Positioning the Repeater in a Rack
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Installing a Smart Uplink Module
Netelligent 2624 and 3512/3612 managing repeaters have a Smart Uplink bay that lets you install one of the following optional Smart Uplink modules (SUMs):
100Base-TX version (Part No. 267045-001)
100Base-FX (fiber) version with ST connector
(Part No. 267042-001)
100Base-FX (fiber) version SC connector (Part No. 267043-001)
Figure 3-3. Optional Smart Uplink Modules
NOTE:
The Smart Uplink port is the 25th logical port on the 2624 repeater (the 13th
logical port on the 3512/3612 repeater).
Inserting the Smart Uplink Module into a 2624 or 3512/3612 Repeater
To insert a Smart Uplink Module into a Netelligent 2624 or 3512/3612 repeater, follow these steps:
1. Power down the repeater by disconnecting the power cord from the wall outlet or power cord strip.
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2. Remove the Smart Uplink port cover plate from the 2624 or 3512/3612 repeater's front panel.
3. Insert the Smart Uplink module through the port hole, aligning the sides of the SUM with the card guides inside the repeater (Figure 3-4).
CAUTION: Do not tighten the Smart Uplink Module’s spring screws until completing Step 4 of this procedure. If you tighten the spring screws before the SUM is properly seated in the socket, you may damage the repeater.
Figure 3-4.
SUM Installation
4. Carefully push the Smart Uplink module's 50-pin male connector into the
SUM socket on the repeater motherboard until the SUM is firmly seated and its faceplate is flush with the repeater's front panel.
5. Secure the SUM to the repeater by tightening the SUM's spring screws.
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Connecting Twisted-Pair Cable
Each RJ-45 port on the repeater can accept a standard 8-wire twisted-pair (UTP or STP) cable that ends with an RJ-45 connector. These ports can support cable lengths up to 100 meters (328 feet). The TX models use Category 5 cable.
To attach twisted-pair cable, plug one of the RJ-45 connectors into the selected port on the repeater. Connect the other RJ-45 connector into a 100Base-T­equipped device.
Figure 3-5.
Connecting Twisted-Pair Cable
Interconnecting Repeaters
You connect 2524/ 2624 and 3512/3612 repeaters in somewhat different ways. Each method is described below.
NOTE:
You cannot mix 2524/ 2624 and 3512/3612 repeaters in the same stack.
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Interconnecting 2524/2624 Repeaters
You can interconnect one or two 2524 repeaters with one 2624 100Base-T repeater to form one logical repeater stack that supports up to 72 Fast Ethernet ports. You can also interconnect two 2524 repeaters to form one logical repeater stack that supports up to 48 Fast Ethernet ports. Configurations include:
Two 2524 repeaters
One 2524 and one 2624 managing repeater
Two 2524 repeaters and one 2624 managing repeater
You can place the 2624 repeater in any position (top, middle, bottom) in a two­or three-repeater stack. The 2624 100Base-T repeater has an expansion interface that consists of two 68-pin backplane connection cables (EXPN PORT A and EXPN PORT B) on the repeater's back panel.
The 2524 repeater has one 68-pin backplane connection cable (EXPN PORT) and two dip switches for UNM/MAN and HOST/TARGET settings. The switch settings are described in the section “2524 Dip Switch Settings” in this chapter.
If possible, mount the repeaters on a rack or place them on a stable mounting surface with the supplied rubber feet affixed before you attach the backplane connection cable. This helps ensure the correct spacing between repeaters and helps prevent stretching and possibly damaging the backplane connection cable during installation.
2524 Dip Switch Settings
The dip switches on the back of the 2524 repeater come factory pre-set so you can create a managed stack of three repeaters (one or two 2524 repeaters and one 2624 repeater). Or, by reconfiguring the dip switches, you can create an unmanaged stack of two 2524 repeaters. The dip switch settings are described below:
IMPORTANT:
Incorrectly setting the dip switches will
not
damage the repeaters.
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HOST/TARGET
TARGET (Factory default setting) Lets you connect one or two 2524 repeaters to a 2624 managing repeater to form a “managed” 72-port Fast Ethernet repeater
HOST Lets you connect two 2524 repeaters in an unmanaged stack to form a single 48-port Fast Ethernet repeater (with no 2624 repeater in the stack). One repeater must be re-configured as the HOST and the other as the TARGET.
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Invalid Connections
The following are invalid connections for the 2524/2624 repeaters:
Connecting two 2624 managing repeaters together Repeaters will operate as if disconnected
Setting a 2524 repeater in a managed stack to the HOST mode Repeaters will operate as if disconnected and the HUB STATUS LED on the 2524 and 2624 repeaters will be solid YELLOW to indicate isolation. To correct, set the dip switch on the 2524 repeater to TARGET.
Setting both 2524 repeaters in an unmanaged stack to HOST or to TARGET mode HUB STATUS LED will be solid YELLOW, indicating the repeaters cannot communicate. To correct, set the dip switch on one repeater to HOST and on the other as TARGET.
UNM/MAN
UNM (Unmanaged) In this mode, if you change the dip switch on the 2524 repeater to UNM, all repeater ports on the 2524 are automatically enabled after turning the repeater OFF and then ON. This mode lets you use a 2524 under the following conditions:
The 2524 is disconnected from the 2624.
The 2624 is OFF or otherwise not operating.
MAN (Managed) (Factory-default setting) In this mode, the port configuration settings for the 2524 repeater are non-volatile. In addition, if you remove the 2524 repeater from the stack, the disabled ports remain disabled. (You can re-enable them by setting the dip switch to UNM and turning the repeater OFF and then ON.) For example, if you disable Ports 1 and 2, then power down the stack, Ports 1 and 2 will still be disabled when the stack is powered up again.
In a managed stack, if you set the 2524 dip switch to UNM, the HUB STATUS LED on the 2524 FLASHES GREEN.
Figure 3-6 shows EXPN PORT A and B of a 2624 repeater connected to the EXPN PORTs of two 2524 repeaters using an backplane connection cable.
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Figure 3-6. Stack Connecting One 2624 and Two 2524 Repeaters with Backplane Connectors
In this example, the 2624 repeater (top repeater in the stack) manages two 2524 repeaters. The dip switches on both 2524 repeaters are set to “TARGET,” as required in a managed stack.
Figure 3-7 shows two 2524 repeaters connected via a backplane connector between the EXPN PORTs. The dip switches on the 2524 repeaters are set with the top repeater as the HOST and the bottom repeater as the TARGET.
Figure 3-7. Interconnecting Two 2524 Repeaters Via a Backplane Connection Cable
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In this example, the unmanaged stack consists of the maximum of two 2524 repeaters. The top repeater has been set to HOST, while the bottom repeater is the TARGET. Either repeater in the stack can be the HOST or the TARGET. Both repeaters are in the factory-default MAN mode.
Interconnecting 3512/3612 Repeaters
You can interconnect up to five 3512/3612 100Base-T repeaters to form one logical repeater that supports up to 60 Fast Ethernet ports. You can place the managing repeater (Model 3612) in any position in the stack.
Each repeater has an expansion interface that is comprised of two 100-pin connectors (UP and DOWN) on the repeater's back panel. Figure 3-6 shows how the UP connector of a bottom repeater connects to the DOWN connector of an adjacent upper repeater via a FlexPlane connector (Part No. 810172-000). If possible, mount the repeaters on a rack or place them on a stable mounting surface with the supplied rubber feet affixed before you attach the FlexPlane connector. This helps ensure the correct spacing between repeaters and helps prevent stretching and possibly damaging the FlexPlane cable during installation.
WARNING:
The FlexPlane connector is not hot swappable. Be sure you
power down the entire repeater stack before you connect repeaters.
PWR A
PWR B
UP
DOWN
PWR A
PWR B
UP
DOWN
Backplane Connector
100-240 VAC, 3A-1.5A,50/60 HZ
100-240 VAC, 3A-1.5A,50/60 HZ
Figure 3-8.
Interconnecting Repeaters with a FlexPlane Connector
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Connecting Power
Follow these steps to connect the repeater to power:
1. Plug the power cord into the power cord connector on the back of the repeater. (In this example, a 2624 repeater is shown.)
Figure 3-9.
Connecting Power
2. Insert the three-pronged plug on the power cord into a non-switched,
grounded power source that is near the repeater and easily accessible.
WARNING:
Plugging in the power cord applies power to the repeater.
There is no ON/OFF switch on the repeater.
When you plug in the power cord, the repeater performs a power-on self test (POST), which lasts approximately 1 minute. After a successful POST, the LEDs indicate the current operating status. See the “LED Indicators” section in Chapter 1, “Overview” for more information about the LED status.
If the POST fails, the STATUS LED flashes yellow. If this occurs, disconnect the repeater from power and then reconnect power. If the problem continues, contact Compaq Technical Support.
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Disconnecting Power
To disconnect power from the repeater, remove the power cord from the power source. Do not remove the power cord from the power cord connector on the repeater to disconnect power. Figure 3-8 shows the correct and incorrect ways of disconnecting power from the repeater.
PWR A
100-240 VAC, 3A-1.5A,50/60 HZ
Do
Unplug the Power Cord
From the Grounded Power Source
Unplug the Power Cord
From the Repeater’s
Power Cord Connector
Do Not
Figure 3-10.
Disconnecting Power
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4-1
Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: Liz Fischer Project: Chapter 4 Comments: 283318-001
File Name:2636_4.doc Last Saved On:12/20/96 9:28 AM
Chapter 4
Repeater Management
This chapter discusses management topics common to both the 2624 and 3612 repeaters, including supported MIBs and frame types, IP and IPX support, and the VT100/Telnet management. RMON (Remote MONitor) support and intrusion protection (Model 3612) is at the end of the chapter.
Supported MIBs
Netelligent 2624 and 3612 repeaters support the following MIBs (Management Information Bases) (unless noted, MIBs apply to both repeaters):
Supported MIBs
MIB Model 2624 Model 3612
RFC1213 (MIB II) and RFC1516 (Standard repeater MIB) Yes Yes RFC1271 (RMON MIB) No Yes Proprietary MIB Yes;
CPQN2624 MIB
Yes; MDC100.MIB
Novell proprietary repeater MIB (lets Novell Management Services directly manage the repeater)
Yes Yes
Supported Frame Types
Netelligent 2624 and 3612 repeaters support the following frame types:
Supported Frame Types
802.3 Raw (IPX)
802.2 SNAP (IPX)
Ethernet SNAP (IP)
Ethernet_II (IP)
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NVRAM
Netelligent 2624 and 3612 repeaters store their management configurations (supplied by the SNMP manager or the console manager, VT100 or Telnet) in NVRAM (Non-Volatile RAM). This enables the repeater to recover from a power failure with its full configuration intact.
CAUTION:
The non-volatile SRAM chip (Socket U1) on the repeater's motherboard contains a non-replaceable lithium battery. Only trained service personnel should dispose of this chip.
SNMP Management
Netelligent 2624 and 3612 repeaters supply SNMP management through both in-band and out-of-band communications.
The repeater provides in-band SNMP support in the following manner:
UDP/IP and Novell's IPX protocol stacks
Telnet through TCP/IP for VT100 emulation
Proprietary protocol using IPX
The repeater provides out-of-band management in the following manner:
Serial Line IP (SLIP)
Serial interface using VT100 emulation
IP Support
Netelligent 2624 and 3612 repeaters support the following Internet protocols:
ARP Address Resolution Protocol
RARP Reverse Address Resolution Protocol
BOOTP Boot Protocol
ICMP Internet Control Message Protocol
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UDP User Datagram Protocol
TCP Transmission Control Protocol
SNMP Simple Network Management Protocol
TFTP Trivial File Transfer Protocol
ARP, RARP, and BOOTP provide Internet address resolution capabilities. The repeater uses ARP to resolve the MAC address of any known Internet address with which it needs to communicate. The repeater uses RARP and BOOTP to resolve its Internet address based on the factory-assigned MAC address.
ICMP messages allow IP routers to communicate with various hosts to report abnormal conditions or to send new routing information.
The repeater uses IP fragmentation to provide a seamless interface for management software regardless of the physical constraints of the network interface. IP messages can be up to 1520 bytes long.
IP Autodiscovery Support
Some SNMP management platforms cannot discover repeaters that are not in the ARP cache of a gateway or router. Therefore, it is necessary to regularly update the cache with the IP address of the repeater to be autodiscovered. When IP communication stops between the agent and the SNMP management software, the ARP cache on the gateway or router removes the agent's address (because the agent no longer updates the ARP cache of the gateway or router). The repeater periodically updates the cache by transmitting an ICMP ping to the gateway.
IPX Support
The repeater supports SNMP over Novell's IPX protocol and SNMP over IP. Using SNMP/IPX and Novell's repeater MIB, Novell's NMS can directly manage the repeater. The repeater also supports SAP (Service Advertising Protocol), RIP (Routing Information Protocol), and IPX diagnostics protocols. These features make the repeater HMI (Hub Management Interface) compliant.
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Using SAP, the repeater advertises itself as an HSL service. When Novell's NMS initiates autodiscovery, it produces bindery requests through NCP (NetWare Core Protocol) to a NetWare server. This allows NMS to obtain the internal network number of the repeater's HSL server. RIP allows NMS to obtain the MAC address and other necessary information to start SNMP over IPX communication. IPX diagnostics is implemented only to support the NetExplorer server. This protocol is not directly involved with the NMS autodiscovery algorithm.
The proprietary IPX repeater protocol, as well as SNMP, is supported over Novell's IPX protocol stack. The implementation of this protocol provides support for Redirector. Through the Redirector, Novell's Hubcon can manage the repeater.
The repeater IPX proprietary protocol provides a mechanism over IPX to set the IP address. Since the IPX address of a repeater is derived from the network number and the hardware MAC address, you do not need to set an address for IPX communication. Using the proprietary protocol, you can set the IP address, subnet mask, default gateway IP address, SNMP write community, IPX frame type, RARP and BOOTP, SAP broadcast disable, and an additional parameter for the frame type.
The repeater supports the following frame types: IPX over Ethernet II, 802.3 RAW, 802.2 Type I and II, and 802.2 SNAP.
Configuring the Repeater at Bootup
You can configure a BOOTP server to supply the IP address, subnet mask, and a default gateway IP address for a particular hardware MAC address. When you power up a repeater stack, the managed repeater uses the information stored in NVRAM to configure the repeater at bootup. There are two boot phases: Boot and Runtime.
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In the Boot phase, the HUB STATUS LED is yellow. If you have enabled BOOTP/RARP requests, the repeater issues the number of requests defined in the fsnBootpRarpRetries MIB object in the CPQN2624 MIB (2624) or MDC100 MIB (3612) and displayed in the VT100 console interface). The default number of requests is two. The repeater issues the requests using two different frame types (Ethernet_II and 802.2 SNAP). You define the interval between requests in the fsnBootpRarpRetryInterval MIB object. The interval for the default request retry is 5 seconds.
In the Runtime phase, the HUB STATUS LED is green. If BOOTP/RARP requests are enabled and the repeater does not have an IP address currently assigned, the repeater issues requests every 5 minutes using only one frame type (same as the IP frame type).
If the repeater receives a response from either type of server, the managed repeater uses the information and configures the stack accordingly.
If desired, you can use your network management software or the serial interface to set the fsnBootpRarpRequests MIB variable so that the repeater does not issue BOOTP/RARP requests. This is preferred if you use only IPX communication, as it helps reduce unnecessary traffic generated by the repeater.
NOTE: A RARP server provides only an IP address. A BOOTP server is required to automate downloads.
Using the VT100 Serial Port/Telnet Management Interface
Besides SNMP and RMON (3612 only) network management, the repeaters support out-of-band management via a serial port connection and in-band management via a Telnet connection. These let you set numerous management parameters, including the IP address and subnet mask for both the Ethernet and serial interface, as well as the default gateway IP address and SNMP write community for the Ethernet interface. The VT100 interface has two distinct modes of operation, Boot and Runtime, which let you perform the following management operations:
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Boot Mode (HUB STATUS LED is yellow)
View and edit system information
Download firmware via XMODEM or TFTP (over Ethernet)
Set up the modem
Change the password
Runtime Mode (HUB STATUS LED is green)
All the above functions plus:
View and edit port and port group statistics/status
Change the backup port configuration
Download firmware via TFTP over SLIP (if the session is running through Telnet over an Ethernet connection)
Setting up the Terminal Emulation Program
Set up the terminal emulation program with the following settings:
8 data bits
1 stop bit
No parity
9600 bps
No flow control
NOTE: If you use the Windows 3.1 Terminal program, select Terminal Preferences from the Settings menu. Then uncheck the Use Function, Arrow, and Ctrl Keys
for Windows option box. This enables the arrow keys to function correctly in the interface program. If you use the Windows 95 HyperTerminal program, enter a name in the Connection Description box and set up a New Connection Direct to Com 1. Set the Com 1 Port Settings as described above. From File Properties/Settings, set the Emulation to VT100.
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Starting the Management Session
NOTE:
The Login screen in the VT100 console interface requires that you enter your
password within a specific amount of time.
You start the management session for the 2624 and 3612 repeaters in the same way. When you apply power to the repeater, the Boot phase starts (the HUB STATUS LED is yellow). After about 10 seconds, the HUB STATUS LED changes to green to indicate that the repeater is in the Runtime phase and is ready for the management session.
After the repeater enters the Runtime mode, follow these steps to start a management session.
If the repeater uses a null modem connection, start with Step 1. If the repeater uses a regular modem connection, start with Step 2.
1. In the Runtime mode, the repeater firmware displays a modem
initialization string every 10 seconds, with each string representing a different baud rate (19.2K, 14.4K, 9600, and 2400). When the firmware detects the baud rate that matches the terminal baud rate, it displays a readable alphanumeric character string similar to the following:
at&fs0=1
2. Within 10 seconds after a readable alphanumeric character string
appears, enter the following command:
VT100
The Login screen appears.
Figure 4-1.
Login Screen
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NOTE: If the 10 seconds expires before you enter VT100, you must wait for the
port to cycle back to the modem initialization string.
3. Within 10 seconds after the Login screen appears, enter the password.
The default password is <public>. The Main menu screen appears.
NOTE: The following screen shows the Runtime main menu for a 2624 repeater (the 3612 repeater also contains a Stack Configuration option). If you start the VT100 session while the HUB STATUS LED is orange (less than 1 minute after you power up the repeater), the Boot main menu appears. This menu differs slightly from the Runtime menu. To get to the Runtime main menu from the Boot main menu, you must end the VT100 session, wait for the HUB STATUS LED to turn to green, and then restart the VT100 session.
Figure 4-2.
Main Menu Screen
Error Messages
If you enter an incorrect password, the following error message appears:
ERROR: Password incorrect, please re-enter.
If you forget the password, contact Compaq Technical Support.
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Navigating Menu Option Screens
To select a menu option from the Main menu screen, use the Tab key or arrow keys to position the cursor on the option. Then press the Enter key to display the screen for the selected option.
Each menu option screen displays the system time, system name, and repeater IP address. Some menu options screens let you edit various fields. Editable fields are highlighted. Other screens allow you only to view the information on the screen. Un-editable fields are in normal text (not highlighted).
Use the following methods to navigate a menu option screen:
To move the cursor from one field to the next, press the Tab key or the arrow keys. Press the right or down arrow key to move the cursor forward, and press the left or up arrow key to move the cursor backward. When the cursor is on a field, it blinks to indicate its position.
Multiple-choice fields are enclosed in left and right angle brackets (<>). To toggle between options for a field, press the space bar.
To apply changes to all modified fields and return to the main menu, move the cursor to the Accept changes box and press the Enter key. To return to the main menu without saving changes, move the cursor to the Cancel changes field and press the Enter key.
To execute an operation, press the Enter key.
NOTE: If you use the Windows 3.1 Terminal program, select Terminal Preferences from the Settings menu. Then uncheck the Use Function, Arrow, and Ctrl Keys
for Windows option box. This enables the arrow keys to function correctly in the interface program. If you use the Windows 95 HyperTerminal program, enter a name in the Connection Description box and set up a New Connection Direct to Com 1. Set the Com 1 Port Settings as described above. From File Properties/Settings, set the Emulation to VT100.
The following sections describe each menu option screen.
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Viewing System Information
The System Information screen shows the primary system identification information.
Figure 4-3.
System Information Screen
You can select the following frame types from the System Information window:
IP frame types: Ethernet_II or Ethernet SNAP
IPX frame types: 802.2, or 802.3
Error Messages
The following error message can occur if you have incorrectly entered information in the System Information window:
ERROR: The field must be in the range [0...255]
The following error messages can occur if entered values are out of range:
ERROR: The value is too small ERROR: The value is too large
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Viewing the Stack Configuration (Model 3612)
The Stack Configuration screen (Model 3612) shows the unit number, backplane number, backplane type, managed status, and unit description. You can change only the backplane number (1, 2, 3, or Isolated). When you make a change, the change becomes effective immediately.
Figure 4-4.
Stack Configuration Screen
The Managed Status field indicates the status of the repeater’s hardware management override switch setting (see “Appendix B, Internal DIP Switch [Models 3512/3612]”). If the field reads Yes, the switch is at its default (no management override) setting.
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Viewing the Backup Port Configuration
The Backup Port Configuration screen shows information about the slot number of the primary and backup port and the status of the ports. The screen also lets you add, delete, and enable or disable the state of backup port entries.
Figure 4-5.
Backup Port Configuration Screen
Adding a Backup Port Entry
To add a backup port entry, follow these steps:
1. From the Action field, move the cursor to the Primary Unit entry field.
Then enter the number of the desired primary unit.
2. Move the cursor to the Primary Port entry field. Then enter the number of
the desired primary port.
3. Move the cursor to the Backup Unit entry field. Then enter the number of
the desired backup unit.
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4. Move the cursor to the Backup Port entry field. Then enter the number of
the desired backup port.
5. Move the cursor to the State Entry field and press the space bar to select
Enable or Disable.
6. Move the cursor to the Action field and press the space bar until Add
appears.
7. Press the Enter key. The new backup port entry appears in the backup port
configuration list.
Deleting a Backup Port Entry
To delete a backup port entry, follow these steps:
1. When the cursor at the Action field, press the - or + keys to highlight a
backup port entry.
2. Move the cursor to the Action field and press the space bar until Delete
appears.
3. Press the Enter key. When you delete an entry, the backup port remains disabled. To enable the port,
see the section “Port Statistics” in this chapter.
Updating the State of a Backup Port Entry
To update the state of a backup port entry, follow these steps:
1. Press the - or + keys to highlight a backup port entry.
2. Move the cursor to the State entry field.
3. Press the space bar until the desired option (Disabled or Enabled) appears.
4. Press the Enter key.
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Error Messages
The following error messages may appear if you enter information incorrectly in the Backup Port Configuration window:
ERROR: Input fields not complete ERROR: Unable to set backup group ERROR: Invalid port number ERROR: Unable to set backup group and port
To correct the error, be sure you have correctly entered all the necessary information in the various fields, including valid port and backup port numbers. Be sure the spelling and number sequences are correct. If the error message continues to appear, contact Compaq Technical Support.
NOTE: To move to the Return to menu field, the cursor must first be in the Action field.
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Viewing Port Statistics
The Port Statistics screen shows statistical information for each port, as shown in the following illustration.
Figure 4-6.
Port Statistics Screen
To enable or disable a port, move the cursor to the desired port and press the space bar. You can toggle the <Port State> field to Enabled/Disabled.
To scroll forward or backward to other ports, move the cursor to the Scroll field and press the < and > keys. To scroll forward or backward to other units, move the cursor to the Scroll field and press the - and + keys.
Shortcut: You can change the Scroll setting to scroll up to nine ports at a time (the default is one, as shown in Figure 4-5). When you press the < and > keys, the screen scrolls the specified number of ports.
NOTE:
Refer to the glossary for definitions of these statistics.
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Viewing Port Group Statistics
The Port Group Statistics screen shows statistical information for a specific port group. This information varies for the 2624 and 3612 repeaters, each of which is shown below. The 2624 repeater displays the unit number, managed status, readable frames, and collisions (Figure 4-7).
Figure 4-7.
Port Group Statistics Screen (Model 2624)
The 3612 repeater displays the unit number, backplane number, backplane type, managed status, readable frames, and collisions (Figure 4-8).
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Figure 4-8. Port Group Statistics Screen (Model 3624)
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Changing Your Password
The Change Password screen lets you change your current password. To change your password, follow these steps:
1. Enter the old password in the Old password field.
NOTE:
You must enter information in the Old password field to advance the
cursor to the New and Verify password fields.
2. Enter the new password in the New password and Verify password fields.
3. Press the Enter key.
Figure 4-9.
Change Password Screen
Error Messages
The following error messages can occur if you have incorrectly entered information in the Change Password window:
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ERROR: Old password not valid ERROR: Verify Password does not match New Password
Downloading Firmware
The Download Firmware screen lets you download an updated version of firmware. You can download Runtime only or a combination of Boot and Runtime. The download can take place via a serial connection using XMODEM (default) or TFTP over Ethernet, or via a Telnet connection using TFTP over SLIP or Ethernet. Null modem SLIP connections can only occur at 9600 baud. SLIP connections over a remotely linked modem are available at 2400, 9600, and 19.2K baud.
Figure 4-10.
Download Firmware Screen
To download firmware, follow these steps:
1. Position the cursor on the Download Type field. Press the space bar to
select Runtime Only or Boot/Runtime.
2. Position the cursor on the Protocol type field. Press the space bar to
select the desired option (XMODEM, TFTP, and so forth).
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3. Position the cursor on the Version field and enter the firmware version,
including any leading zeros (no periods). This information must be correct for a successful download. Refer to any release notes, README files, or other documentation that accompanies the firmware upgrade for the correct firmware version.
4. If you selected TFTP as the protocol type, enter the TFTP server IP
address in the TFTP server IP address field and enter the firmware image filename in the Filename field.
5. To execute the download, position the cursor on the Start download field
and press <Enter>. Or, to cancel the download and return to the Main menu screen, position the cursor on the Return to menu field and press the Enter key.
Error Messages
The following error messages may appear if you enter information incorrectly in the Download Firmware window:
ERROR: Invalid parameter set ERROR: Version string invalid ERROR: Invalid version identifier
To correct the error, be sure you have entered the correct parameters and version string. Be sure the spelling and number sequences are correct. If the error message continues to appear, contact Compaq Technical Support.
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Setting Up the Modem
The Modem Setup screen lets you enter the modem's initialization string and disable or enable auto negotiation. The default initialization string is usually adequate. For more information, refer to the modem documentation.
Figure 4-11.
Modem Setup Screen
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Logging Out of the Management Session
The Logout screen lets you end the VT100 management session.
Figure 4-12.
Logout Screen
If you select Yes, the Login screen reappears and you have 10 seconds to retype the password if desired.
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RMON Support (Model 3612)
The 3612 repeater's remote monitoring (RMON) support allows the management system to remotely monitor the repeater for diagnostic purposes. The repeater supports four RMON groups including Statistics, History, Alarm, and Event.
Statistics Group
The Statistics group contains statistics measured for a collision domain. This helps indicate the load on a collision domain and the overall health of the domain by reporting conditions such as CRC (cyclic-redundancy check) alignment errors, collisions, and undersize and oversize packets.
History Group
The History group records periodic statistical samples from the collision domain and stores them in an SNMP table for later retrieval. The historyControl table stores configuration entries, each of which defines an interface, polling period, and other parameters. Once samples are taken, the sample data is stored in an entry in a media-specific table. Each such entry defines one sample and is associated with the historyControl entry that caused the sample to be taken. The only media-specific table defined is the etherHistoryTable, for Ethernet networks. You can specify the number of samples and sample interval.
You can sample the following variables:
Octets
BroadcastPkts
MulticastPkts
CRCAlignErrors
UndersizePkts
OversizePkts
Fragments
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Jabbers
Collisions
Utilization
Alarm Group
The Alarm group periodically takes statistical samples from variables and compares them to previously configured thresholds. The alarm table stores configuration entries, each of which defines a polling period and various threshold values. If a monitored variable exceeds a threshold value, the repeater generates an event. No more events are generated for that threshold until the opposite threshold is exceeded. You can limit the generation of events via the MIB. When sampling a delta value, you can increase the precision of the sample by taking the sample twice per period and comparing the sum of the latest two samples to the threshold. This allows the repeater to detect threshold crossings that span the sampling boundary. This does not require any special configuration of the threshold value.
Event Group
The Event group controls the generation and notification of events from the repeater. Each entry in the eventTable describes the event's parameters that can be triggered. The repeater generates an event when an associated condition is present in the MIB. The event can trigger a related function in the MIB. Each eventEntry can specify that, when an event occurs, a log entry and an SNMP trap message is created for the event. The community for the SNMP trap message is contained in the associated eventCommunity object. The condition that triggers the event determines the enterprise and specific trap fields of the trap. If the eventTable is triggered by a condition specified elsewhere, the enterprise and specific trap fields must be specified for traps generated for that condition.
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Intrusion Protection (Model 3612)
The 3612 repeater's firmware supports intrusion protection, which provides a method of preventing unauthorized access to the network. Intrusion protection allows any SNMP manager to configure one MAC address per port and to enable or disable intrusion protection on a per port basis.
Do not set intrusion protection on an uplink port that receives multiple MAC addresses. Otherwise, the repeater partitions the port.
Follow these steps to enable intrusion protection for a port:
1. Using an SNMP MIB browser, set the authorized MAC address in the
mdcIntrusionPortMACAddress or mdcIntrusionPortMACAddressStr MIB variable.
2. Set the mdcIntrusionPortStatus MIB variable to enable(2).
Once you configure intrusion for a port, the repeater's firmware monitors the port for intruders. If the port detects an unauthorized MAC address, the repeater partitions the port, sets mdcIntrusionPortStatus variable to tripped(3), and generates a Novell Health State trap in the trap table.
To restore the port after it detects an intruder, use an SNMP manager to set the rptrBasPortAdminState MIB variable (located in the Novell MIB) to enable(2).
Changing the Status of a Port
The SNMP manager lets you change the intrusion status of a port via the mdcIntrusionPortStatus MIB variable. To do so, follow these steps:
1. Verify that the mdcSecurityStatus MIB variable is set to disable(1).
2. Set the mdcIntrusionPortStatus MIB variable to disable(1) or enable(2).
NOTE:
If the SNMP manager tries to change the settings of mdcIntrusionPortStatus when mdcSecurityStatus is set to enable(2), a PDU error occurs. See “Security” in the next section for more information about the mdcSecurityStatus settings.
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Security
The security feature provides further network security by restricting access to the mdcIntrusionPortStatus, mdcIntrusionPortMACAddress, and mdcIntrusionPortMACAddressStr MIB variables. You can restrict access to these intrusion table MIB variables by setting the mdcSecurityStatus MIB variable to enable(2). The default value is disable(1), which allows the SNMP manager to directly access the intrusion table through normal SNMP set PDUs (Protocol Data Units).
CAUTION:
Once you set mdcSecurityStatus to enable(2), you cannot directly disable security; you must use the mdcSecurityResetStatus MIB variable to indirectly set mdcSecurityStatus to disable(1). If you need to set values in the intrusion table after you enable security, you must do so using the mdcSecurityCommand MIB variable (an encrypted value). Do not set mdcSecurityStatus to enable(2) unless the SNMP manager can encrypt values for the mdcSecurityCommand and mdcSecurityResetStatus MIB variables. Do not use a MIB browser to enable security.
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Appendix A Specifications
The following specifications list the physical, electrical, and environmental characteristics of the repeater.
Physical
Weight
2524/2624: 11.00 lb (4.78 kg)
3512/3612: 6.65 lb (3.01 kg)
Dimensions (HxWxD)
2524/2624: 2.60 x 17.00 x 13.65 inches (6.7 x 43.6 x 35.0 cm)
3512/3612: 1.75 x 17.00 x 13.65 inches (4.5 x 43.6 x 35.0 cm)
Rubber Foot: 0.25 inches, 0.635 cm high
Electrical
Power
2524/2624 - 1.7A (@ 100 VAC) to 0.65A (@ 240 VAC)
3512/3612 - 1.5A (@ 100 VAC) to 0.90A (@ 240 VAC)
Power Supply
2524/2624 - 110W internal
3512/3612 - 90W redundant, hot-swappable
Frequency: 50 to 60 Hz
Cooling
2524/2624 - One 60mm, 5 VDC fan (rear-mounted)
3512/3612 - Two 40mm, 12 VDC fans (rear- and side-mounted)
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Environmental
Temperature: Operating: 32° to 104° F, 0° to 40° C Storage: 32° to 151° F, 0° to 60° C
Humidity: Operating/Storage: 5% to 95% (non-condensing)
Altitude: Operating: 0 to 10,000 ft, 0 to 3 km Storage: 0 to 30,000 ft, 0 to 9 km
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Appendix B
Internal Dip Switch (Models 3512/3612)
If management is not available for the repeater, you can isolate the repeater's collision domain from other repeaters in the stack by setting an internal dip switch that is accessible through the Power Supply A or B opening. The following diagram shows the available switch settings.
11
1
1
22
2
2
3
3
Switches 1 and 2:
Backplane Select
Switch 3:
Hardware Override
= Backplane 1
= Enable Switch Settings
= Disable Switch Settings
(default)
= Backplane 2
= Backplane 3
= Isolated
100Base-T Repeater Internal DIP Switch
ON
1122334
4
Figure B-1. Optional Dip Switch Settings
CAUTION:
After you set the dip switches and power on the repeater, all ports on the unit default to enabled. In this “standalone” mode, you cannot change the repeater's configuration from the management platform. Use this mode of operation only when all other configuration methods are unsuccessful.
NOTE:
Switch 4 is not used.
NOTE:
The unmanaged 2524 repeater contains external dip switches on the back of the unit. The functions of these switches differ from the 35122/3612 dip switches. For information about the dip switch settings for the 2624 repeater, see the section “Dip Switch Settings” in Chapter 3.
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Appendix C
Upgrading the DRAM (Model 3612)
The 3612 repeater comes with 512KB of DRAM pre-installed. You can upgrade the DRAM by installing a 4MB or 8MB SIMM. More DRAM allows the repeater to collect more RMON statistics.
Figure C-1. 8MB SIMM for DRAM Upgrade
Installing a SIMM
Follow these steps to install a SIMM in the repeater.
1. Disconnect power from the repeater by removing the power cord from
the power source.
NOTE:
Do not disconnect power by removing the power cord from the repeater's power cord connector on the back panel. This is not a tested disconnect.
2. Remove the chassis cover from the repeater.
3. Facing the front of the repeater, locate the SIMM socket at the front of the elevated PCB on the left of the repeater.
4. Align the SIMM's contacts with the contacts in the SIMM socket. Then carefully press the SIMM into the socket.
5. Push the SIMM into the metal tabs until the SIMM snaps into place.
6. Replace the chassis cover.
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Appendix D
Electrostatic Discharge
A discharge of static electricity from a finger or other conductor may damage printed circuit boards or other static-sensitive devices. This type of damage may reduce the life expectancy of the device.
Preventing Electrostatic Discharge
To prevent electrostatic damage, observe the following precautions:
Avoid hand contact by transporting and storing parts in static-safe containers.
Keep electrostatic-sensitive parts in their containers until they arrive at static-free workstations.
Place parts on a grounded surface before removing them from their container.
Avoid touching pins, leads, or circuitry.
Always be properly grounded when touching a static-sensitive component or assembly.
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Grounding Methods
There are several methods for grounding, Use one or more of the following measures when handling or installing electrostatic-sensitive parts:
Use a wrist strap connected by a ground cord to a grounded workstation or the computer chassis. Wrist straps are flexible straps with a minimum of 1 megohm +/- 10 percent resistance in the ground cords.
Use heel straps, toe straps, or bootstraps at standing workstations. Wear the straps on both feet when standing on conductive floors or dissipating floor mats.
Use conductive field service tools.
Use a portable field service kit with a folding static-dissipating work mat.
If you do not have any of the suggested equipment for proper grounding, have an Authorized Compaq Service Provider install the part.
NOTE: For additional information on static electricity, or assistance with the installation of this product, contact your Authorized Compaq Service Provider.
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Glossary
This Glossary defines general terms associated with local area networks and with 2524/2624 and 3512/3612 repeaters.
10BASE-T
An IEEE Standard (802.3) for local area networks. Complying networks must be able to carry information at a rate of 10 Mb/s over distances up to 100 meters of unshielded twisted-pair cable.
100Base-T
An IEEE Standard (802.3) for local area networks. This term is synonomous with Fast Ethernet and encompasses 100Base-TX, 100Base-T4, and 100Base-FX.
100Base-T4
The IEEE 802.3u specification for transmitting 100 Mb/s Fast Ethernet over four pairs of copper wire (including Categories 3, 4, and 5).
100Base-TX
The IEEE 802.3u specification for transmitting 100 Mb/s Fast Ethernet over two pairs of copper wire.
802.2 SNAP
(Sub-Network Access Protocol)A variation on the 802.2/802.3 scheme which expands the 802.2 LLC header to provide sufficient space in the header to identify almost any network protocol.
802.3
An IEEE standard for Ethernet local area networks based on Carrier Sense Multiple Access with Collision Detection (CSMA/CD), which includes 10BASE2, 10BASE 5 and 10BASE-T.
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802.3 RAW
A frame type that uses the packet format defined by the 802.3 IEEE standard without the additional header support such as that provided by
802.2.
ARP
Address Resolution Protocol is used by the TCP/IP protocol stack to dynamically bind an IP address with a MAC address.
Autopartition
A port is autopartitioned (disabled) by the hardware after a continuous collision for 1024 to 2048 bit times or after it detects 32 consecutive collisions.
Backplane
The data bus used to interconnect different communications modules in a concentrator or repeater stack.
Boot Sectors
The 3512/3612 repeater uses 96KB sectors of Flash as the firmware boot sectors. The primary boot sector, which is hardware write-protected, cannot be modified by downloading the Flash.
BOOTP
Bootstrap ProtocolA BOOTP server can be used to provide the initial repeater configuration parameters (e.g., IP address, IP net mask, IP default gateway) and to assist in downloading the latest version of the Flash. A repeater BOOTP request contains its MAC address.
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Bridge
A program running on a computer connecting two LANs that allows traffic from one network to be exchanged with a second network. The networks can be the same or very different (e.g., Ethernet and Token Ring).
Cable Budget
The overall length of cable allowed between two DTEs in a single network segment.
Class I
An IEEE 802.3u repeater class that specifies that only one repeater or repeater stack is permitted in the data path. Class I repeaters can typically support a mix of T4, TX, and FX ports. The 2524/2624 and 3512/3612 repeaters are Class I repeater.
Class II
An IEEE 802.3u repeater class that specifies that up to two repeaters or repeater stacks are permitted in the data path.
COM Port
The communications port on a workstation, server, or other DTE. This port is sometimes referred to as the serial, RS-232, or DB-9 port.
CSMA/CD
Carrier Sense Multiple Access/Collision Detect. This communications access method is used by both 10Base-T and 100Base-T networks.
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DB-9
A category of connector that contains nine pins. DB-9 connectors are commonly used for RS-232 interfaces. For example, a computer's serial (COM) port is usually a DB-9 connector.
DIP Switch
Dual In-line Package Switch. A DIP switch contains a set of small switches that are usually used to set a configuration component of a device.
DTE
Data Terminal Equipment. A device that sends or receives data over a communications channel.
DUART
Dual Universal Asynchronous Receiver Transmitter; a UART provides hardware support for serial communications.
Ethernet II
Ethernet II or "Ethernet DIX v2" was defined by Digital, Intel, and Xerox. The frame format for Ethernet II differs from that of 802.3 in that the header specifies a packet type instead of the packet length.
Fast Ethernet
A term that describes the different categories of the IEEE 100Base-T standard. This includes 100Base-TX, 100Base-T4, and 100Base-FX.
FDDI
Fiber Distributed Data Interface. A high-speed communications standard that uses fiber cabling as the data transfer medium.
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: IM Project: Glossary Comments: 283318-001
File Name:2636_g.doc Last Saved On:12/4/96 2:48 PM
Flash
A memory device that allows unlimited read and limited write (approximately 100K) cycles. Flash PROM in the 2624 and 3612 repeater contains the boot sectors (hardware write protected), an SNMP information sector and the Flash program sectors.
Hub
A device or group of devices that localizes the connections for multiple network nodes.
Hot Swappable
Ability to add or remove a repeater or module without removing power. The 3512/3612 repeater is hot swappable.
Hub Autodiscovery, Novell:
The following terms are associated with the Novell repeater autodiscovery:
IPX Autodiscovery: The ability of a network manager to discover the node address and functionality of network devices. The 2524/2624 and 3512/3612 repeaters support IPX autodiscovery.
HMI Driver: A Hub Management Interface (HMI) driver is an ODI driver running on a NetWare server that is compliant with the Novell HMI specification. A node may emulate an HMI driver by supporting the Novell NWHUB.MIB and IPX autodiscovery.
IPX Diagnostics: IPX diagnostics are required to support the Novell NetExplorer server. The NetExplorer server is used to update the NMS database with the current network configuration.
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G-6 Glossary
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RIP: NetWare Routing Information Protocol (RIP) is the routing protocol used by IPX routers. Using a distance-vector routing protocol, it optimizes the routing between source and destination addresses by minimizing the "hop" count. The firmware supports RIP to allow NMS to ascertain the repeater's MAC address, thus allowing NMS to initiate SNMP over IPX communications.
SAP: The NetWare Services Advertising Protocol (SAP) allows the firmware to advertise its services. The SAP requests, which are issued over IPX, are broadcasted every 60 seconds. The SAP packet contains the SAP IDs of the available services.
SAP ID: The SAP ID is used to identify the type of services available by a server.
ICMP
Internet Control Message Protocol provides error handling and control messages for TCP/IP.
IEC
International Electrotechnical Commission. Sets international electrical and electronics standards.
IEEE 802.3u
An IEEE standard that states the specifications of Fast Ethernet.
IP
Internet Protocol provides connectionless, best effort datagram delivery service.
IP Address
The Internet Protocol address assigned to a repeater, module or node.
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: IM Project: Glossary Comments: 283318-001
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IPX
Novell NetWare Internetwork Packet eXchange protocol that provides a connectionless datagram service.
Jabbering
Continuous transmission from a node; generally as a result of a hardware or firmware failure.
LED
Light Emitting Diode. An LED usually indicates the operating status of a device by displaying various conditions (i.e., different colors and on/off states).
Link Test
A link test is performed by the hardware to ensure the integrity of the cable (i.e., the link). The link test can be disabled to allow old style NICs which are not capable of performing a link test to connect to the repeater. For 10Base-T, the link test is a periodic pulse sent during idle times between packets. For 100Base-T, a continuous transmission of idle codes are sent between packets to ensure link integrity.
MAC Address
The Ethernet MAC address is a 6-byte node address. All Ethernet node addresses are unique. The MAC address of a 2524/2624 or 3512/3612 repeater must be known before the repeater IP address can be set.
Manageable
A module is manageable if it contains a SNMP agent and there is a data communication path to that agent.
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G-8 Glossary
Writer: IM Project: Glossary Comments: 283318-001
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MIB
Management Information Base describes an agent's configuration flexibility, diagnostic ability and information that can be reported to a network management station.
MIC
Media Interface Connector. A MIC is the physical connection between the optical fiber and a workstation in an FDDI installation.
MII
Media Independent Interface.
NCP
NetWare Core Protocol. NCP provides a method of controlling communications between a client station and server.
NIC
Network Interface Controller.
NMS, Novell
Novell's NMS (NetWare Management System) is an integrated network management system that provides a platform for managing a multivendor, heterogeneous network environment. NMS can autodiscover network services by monitoring transmitted SAP IDs. The 2524/2624 or 3512/3612 repeater will advertise that it has HMI driver and repeater services.
NVRAM
NonVolatile Random Access Memory is generally implemented with battery backed up CMOS RAM and/or with Flash PROM.
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: IM Project: Glossary Comments: 283318-001
File Name:2636_g.doc Last Saved On:12/4/96 2:48 PM
Octet
An octet consists of 8 bits (i.e., a byte).
Partition
The electrical disconnecting of a node from a LAN at its point of connection to a repeater. The node remains physically attached. A node can be autopartitioned by the hardware based on network errors. If the node is autopartitioned, the repeater continues to listen to the node and removes the autopartition if the signal becomes acceptable.
POST
Power-On Self Test. A POST consists of a series of diagnostic tests that a computer or other device runs when power is first applied to the unit.
Port
An external connector in which a cable is plugged; used to connect PCs and other node devices to the network.
Propagation Delay
The length of time required for part of an Ethernet packet to reach the far end of a network and for notification of an error (collision) to return before the entire packet is generated.
RARP
Reverse Address Resolution Protocol. A Reverse ARP server can be used to set a repeater's IP address.
Reconnection
The hardware uses a standard reconnection algorithm that reconnects (i.e., enables) an autopartitioned port after data is received for 488 bit times without a collision.
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G-10 Glossary
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Repeater Hop
The action of a data transmission passing through a repeater in a communications circuit. IEEE 802.3 standards specify the number of repeater hops allowed for various types of repeaters. For example, Class II repeaters allow up to two repeater hops per segment.
RJ-45
An 8-wire modular connector used for RJ-45 Ethernet and some telephones.
RMON
Remote Monitor. RMON allows remote data collection and analysis.
Router
A program that connects two networks together. Routers are much more intelligent than bridges and should be used when packets need to be routed according to their higher level protocols. Unlike bridges, routers can maintain several alternative paths and can choose the best path based on traffic conditions.
RS-232
The EIA (Electronics Industries Association) recommended standard 232 defines a standard way of transferring serial information by wire using single-ended line drivers and receivers. RS-232 lines generally include transmit, receive, ground and various control lines.
RS-485
The EIA (Electronics Industries Association) Recommended Standard 485 defines a standard way of transferring serial information by wire using differential line drivers and receivers.
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Netelligent 2524/2624 and 3512/3612 100Base-T Repeater User Guide
Writer: IM Project: Glossary Comments: 283318-001
File Name:2636_g.doc Last Saved On:12/4/96 2:48 PM
SAP
Service Advertising Protocol. SAP distributes services information to all nodes in an IPX network.
SC Connector
A low-cost optical fiber connector.
Segment
A segment is a separate collision domain. Each Ethernet segment supports a 10 Mb/s bandwidth. A multiple segment implementation increases the bandwidth of a Local Area Network.
Segmentation
Segmentation is the process of dividing a network into multiple collision domains.
Server
A computer shared by multiple users in a client/server network.
SLIP
Serial Line IP provides a method of transporting IP datagrams over a serial connection.
SNMP
Simple Network Management Protocol; a protocol used by network management stations to communicate management information over a UDP/IP or IPX network.
ST Connector
An optical medium connector plug and socket.
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