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JUNE 1999
LH8112A
LH8124A
LH8112A-S
LH8124A-S
10/100 MANAGED HUB
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© 1999 Black Box Corporation All rights reserved. Printed in USA. Black Box and the Black Box logo are registered trademarks of Black Box Corporation. All other trademarks appearing in this manual are the property of their owners. This publication is protected by the copyright laws of the United States and other countries, with all rights reserved. No part of this publication may be reproduced, stored in a retrieval system, translated, transcribed, or transmitted, in any form,
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Table of Contents 10/100 Managed Hub Installation & User Guide Introduction ............................................................................................... 7 Unpacking the 10/100 Managed Hub......................................... 7 Overview .................................................................................... 7 Key Features ............................................................................... 9 Front Panel Overview......................................
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Using Expansion Modules ...................................................................... 23 Expansion Module Overview ................................................... 23 Internal Bridge Function ...................................................... 23 2 External Bridge Function ..................................................... 23 Backpressure (flow control) ................................................. 24 Installing a Bridge Module ..............................
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Locking the Mini Console ............................................... 53 Unlocking the Mini Console ........................................... 54 Network Configuration ........................................................ 55 IP Address Configuration ................................................ 55 Subnet Mask .................................................................... 57 Default Gateway ..........................................
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2/3 Port Bridge Module Control/Status ................................ 87 Redundant Link Control ....................................................... 90 Security Intrusion ................................................................. 94 Monitoring the Network ........................................................... 96 Repeater Statistics Information ............................................ 97 Repeater Group Statistics Information ................................
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Introduction Unpacking the 10/100 Managed Hub Check that the following components have been included: • 10/100 Managed Hub • Rack Mount Bracket and Hardware • Rubber Feet • Cascade Cable • Power Cord • Installation & User Guide (this manual) Your order has been provided with the safetest possible packaging. Inspect it carefully. If you discover any shipping damage, notify the carrier and follow their instructions for damage and claims. Be sure to save the original shipping carton if return or st
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The LH8112A-S managed client model shown below, includes an LED panel, 12 dual-speed auto sensing ports, 2 MDI-II ports, and a switch module expansion slot. The LH8112A-S can be fully managed by any master model. Link/RX Power 1 2345678 8 101112 100M 10M MDI-II 10/100 Managed Hub MDI-II Collision ID Forward Ext. Switch Int. Switch Module Switch Installed 1x 2x 3x 4x 5x 6x 7x 8x 9x 10x 11x 12x 10/100 Managed Hub (LH8112A-S) 12-port Client 10/100 Managed Hub LH8124A/LH8124A-S The twenty-four port
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Key Features The 10/100 Managed Hub series has many advanced features: 10/100Mbps Auto Sensing Ports All ports in the 10/100 Managed Hub series are dual speed auto sensing, including the MDI-II ports. Hubs automatically detect the transmission speed and set the port accordingly. Stackability Every model in the 10/100 Managed Hub series is compatible, and can be configured in the same stack with up to 6 hubs, using cascade cables. Expansion Slots Every model in the 10/100 Managed Hub series has o
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RMON Probe Capability The Remote Network Monitoring (RMON) probe is an instrument that exists for the purpose of managing a network. The goals of the RMON probe are described in the following sections: Offline Operation, Proac- tive Monitoring, Problem Detection and Reporting, Value Added Data, and Multiple Managers. The 10/100 Managed Hub supports RMON group (1) statistics, group (2) History, group (3) Alarm, and group (9) Event. • Offline Operation: This allows a probe to be configured to perf
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Redundant Link Capacity Redundant links can be configured enabling up to 24 pairs in a hub. For each pair of redundant links one port must be set as the primary and active, the other as backup and isolated. If the primary port fails, it is isolated and the backup port is set to primary and active. Address Tracking Capability The 10/100 Managed Hub provides MAC Address based tracking capability for traffic analysis to diagnose network problems such as Intrusion. This function records the source M
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Front Panel Overview: Clients An LED panel, 12 dual-speed, auto sensing ports, switch module installed LED, and 2 MDI-II shared ports are on the front panel of the unit. See below. An LED panel, 24 dual-speed, auto sensing ports, switch module installed LED, and 2 MDI-II shared ports are on the front panel of the unit. See below. The Switch Module Installed LED is on if a switch module is installed in the hub. MDI-II Ports LED Panel Hub ID MDI-X Ports Link/RX Power 1 2345678 8 101112 100M 10M MD
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LED Indication The hub’s LEDs indicate status information for the device, its ports for both segments (10Mbps and 100Mbps), and switch status. LED Indicators 12 Port Link/RX Power 1 2345678 8 101112 100M 10M Collision ID Forward Ext. Switch Int. Switch Link/RX Power 13 14 15 16 17 18 19 20 21 22 23 24 100M 10M 1 2345678 9 101112 Collision ID Forward Ext. Switch Int. Switch LED Indicators 24 Port • Power: The Power LED is on when the power cable is plugged into the hub and a wall socket. • Link/R
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Forwarding LED* indicator meaning Forward Status Int Ext Meaning LED Switch Switch 100M On On Off A 10Mbps transmission being received by 100Mbps segment through the internal switch 100M On Off On A 10Mbps transmission being received by 100Mbps segment through the external switch 10M On On Off A 100Mbps transmission being received by 10Mbps segment through the internal switch 10M On Off On A 100Mbps transmission being received by 10Mbps segment through the external switch 100M On On On A 10M
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• Internal Switch (Bridge): The Internal Switch LED is always on when the internal switch (bridge) function is active and forwarding the data. • External Switch (Bridge): The External Switch LED is on when data is being forwarded from one segment to another segment through the external switch port. • Hub ID: Each linked hub is automatically assigned a hub ID number and this number is indicated in the ID indicator. Front Panel Overview: Master Units The front panel for model LH8112A supports the
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Mini Console The Mini Console is a high definition display with console keys that enables you to easily monitor and configure the system. The Mini Console provides watch diagnostic functions, including port settings, status monitoring, traffic utilization, collision, and error rate. With the Mini Console, you can configure each device in a hub and all of its ports. For more information see Chapter 3: Managing Through the Mini Console. K%123 456 78 9 10 11 12 13 14 15 G-A Prev 80 G-B 40 G-C 20 10
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Chapter 1 Installation Choosing a Location The 10/100 Managed Hub location should be less than 100 meters from servers, workstations, or switches. The 10/100 Managed Hub can be desk mounted or rack mounted. CAUTION: Category 5 UTP/STP cables are environmentally sensitive. Make sure that the cable route is not too close to electrical noise sources such as power lines or fluorescent lights. Stacking The 10/100 Managed Hubs are stackable in standard 19” racks. Up to six hubs can be stacked with cas
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Cascading hubs with cascade cables to make a stack is as simple as connecting the Up port of one hub to the Down port of another hub as illustrated below. NMU Stackable Up Down Switch/ Transceiver NMU Stackable Up Down Switch/ Transceiver NMU Stackable Up Down Switch/ Transceiver Cascade Ports NOTE: To connect the cascade cable, the Up port on one hub connects to the Down port of another hub. Constructing a Management Hub Stack A stack can be constructed with up to six hubs in total. One master
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• Console Management Refer to Chapter 4: Console Management • Web-Based Management Refer to the Network Management Guide • SNMP Management Refer to the Network Management Guide Client Hub Role Client hubs supply the stack with additional ports (12/24) and an addi- tional expansion module slot. Client hubs can be positioned above or below the master hub. The LH8112A-S and LH8124A-S can also act as stand alone unmanaged hubs. Hub ID The master hub and client hubs can be positioned anywhere in the
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meters for 10Mbps connections. All ports are hot pluggable. It is recom- mended you label each cable to identify the device or port at each end. 10/100 Managed Hub 13x 14x 15x 16x 17x 18x 19x 20x 21x 22x 23x 24x MDI-II MDI-II Switch Module Installed 1x 2x 3x 4x 5x 6x 7x 8x 9x 10x 11x 12x Shared Ports Shared Ports Connecting Devices Connecting Workstations Install either a 10BASE-T or a 100BASE-TX Fast Ethernet Network Interface Card into each workstation if not already installed. Using a UTP/STP
