Trendnet TE100-DS24 User Manual

TE100-DM/DS Series Dual-Speed Hub User’s Guide
Rev. 01 (May, 1998)
6012-0165001
RECYCLABLE
Wichtige Sicherheitshinweise
1. Bitte lesen Sie sich diese Hinweise sorgf? tig durch.
2. Heben Sie diese Anleitung f? den sp? ern Gebrauch auf.
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4. Um eine Besch? igung des Ger? es zu vermeiden sollten Sie nur Zubeh? teile verwenden, die vom Hersteller zugelassen sind.
5. Das Ger? is vor Feuchtigkeit zu sch? zen.
6. Bei der Aufstellung des Ger? es ist auf sichern Stand zu achten. Ein Kippen oder Fallen k? nte Verletzungen hervorrufen. Verwenden Sie nur sichere Standorte und beachten Sie die Aufstellhinweise des Herstellers.
7. Die Bel? tungs? fnungen dienen zur Luftzirkulation die das Ger? vor ? erhitzung sch? zt. Sorgen Sie daf? , daß diese ? fnungen nicht abgedeckt werden.
8. Beachten Sie beim Anschluß an das Stromnetz die Anschlu? erte.
9. Die Netzanschlu? teckdose muß aus Gr? den der elektrischen Sicherheit einen Schutzleiterkontakt haben.
10. Verlegen Sie die Netzanschlu? eitung so, daß niemand dar? er fallen kann. Es sollete auch nichts auf der Leitung abgestellt werden.
11. Alle Hinweise und Warnungen die sich am Ger? en befinden sind zu beachten.
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14. ? fnen Sie niemals das Ger? . Das Ger? darf aus Gr? den der elektrischen Sicherheit nur von authorisiertem Servicepersonal ge? fnet werden.
15. Wenn folgende Situationen auftreten ist das Ger? vom Stromnetz zu trennen und von einer qualifizierten Servicestelle zu ? erpr? en:
a– Netzkabel oder Netzstecker sint besch? igt. b– Fl? sigkeit ist in das Ger? eingedrungen. c– Das Ger? war Feuchtigkeit ausgesetzt. d– Wenn das Ger? nicht der Bedienungsanleitung ensprechend funktioniert oder Sie mit
Hilfe dieser Anleitung keine Verbesserung erzielen. e– Das Ger? ist gefallen und/oder das Geh? se ist besch? igt. f– Wenn das Ger? deutliche Anzeichen eines Defektes aufweist.
ii
16. Bei Reparaturen d? fen nur Orginalersatzteile bzw. den Orginalteilen entsprechende Teile verwendet werden. Der Einsatz von ungeeigneten Ersatzteilen kann eine weitere Besch? igung hervorrufen.
17. Wenden Sie sich mit allen Fragen die Service und Repartur betreffen an Ihren Servicepartner. Somit stellen Sie die Betriebssicherheit des Ger? es sicher.
iii
Trademarks
Contents subject to change without prior notice. All trademarks belong to their respective proprietors.
Copyright Statement
No part of this publication may be reproduced in any form or by any means or used to make any derivative such as translation, transfor­mation, or adaptation without permission from the manufacturer, as stipulated by the United States Copyright Act of 1976.
FCC Warning
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 this user’s guide, 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 his own expense.
CE Mark Warning
This is a Class A product. In a domestic environment, this product may cause radio interference in which case the user may be required to take adequate measures.
VCCI A Warning
iv
v
TABLE OF C ONTENTS
ABOUT THIS GUIDE.................................................................xi
Models Covered........................................................................xi
Conventions .............................................................................xi
Overview of the User's Guide ..................................................xii
CHAPTER 1 : INTRODUCTION.....................................................1
Product Description..................................................................1
Product Features......................................................................2
Dual-Speed Ethernet Hub..........................................................4
Technology Overview ................................................................4
100BASE-TX Technology Overview............................................5
100Mbps Fast Ethernet Introduction.........................................................5
Cables and Connectors...................................................................................6
Topology.............................................................................................................6
Network Diameter...........................................................................................7
Hub Types.........................................................................................................7
CHAPTER 2 : UNPACKING AND SETUP......................................9
Unpacking ................................................................................9
Identifying External Components ............................................ 10
Front Panel.....................................................................................................10
Rear Panel.......................................................................................................12
Installing the Hub ...................................................................13
About This Guide vi
Installation.....................................................................................................13
Rack Mounting...............................................................................................14
Replacing the Power Supply .................................................... 15
CHAPTER 3 : UNDERSTANDING INDICATORS ..........................17
Hub State Indicators............................................................... 18
Module Indicators (SLOT1 & 2) .............................................. 19
Port State Indicators .............................................................. 20
SNMP Indicator ..................................................................... 21
Port Speed Indicators ............................................................. 21
Console Port Indicator (CON).................................................. 22
CHAPTER 4 : MAKING CONNECTIONS.....................................23
Hub Cascad ing/Building a Stack ............................................23
Connectivity Rules.................................................................. 25
The Diagnostic Port................................................................ 26
Diagnostic Port Connection.........................................................................26
Hub to End-Station Connection............................................... 27
Hub-to-Hub Uplink ................................................................. 29
Optional Module Connections ..................................................31
Module Installation......................................................................................31
Switch Module................................................................................................32
Fiber Optic Module.......................................................................................33
Fast Ethernet Module..................................................................................34
CHAPTER 5 : MASTER HUB SETUP AND MANAGEMENT.........37
Navigation and Conventions ................................................... 38
In-Band Setup Instructions..................................................... 39
vii
Dual-Speed Stackable Hubs User’s Guide
Backup Master Function ......................................................... 40
Segmenting Hubs.................................................................... 41
Logging in to the Hub Console ................................................ 43
Logging In ........................................................................................................43
Changing Your Password.............................................................................45
Setting Up the Master Hub ..................................................... 47
TCP/IP Settings .............................................................................................47
Out-of-Band Management and Console Settings ..................................49
Software Update on Boot.............................................................................50
SNMP Information........................................................................................52
SNMP Traps...................................................................................................53
SNMP Security (Community Names)......................................................55
Adding and Deleting Users .........................................................................56
Primary/Backup Master..............................................................................58
Hub Stack Management.......................................................... 59
Controlling Hubs in the Hub Stack...........................................................59
Controlling Individual Ports.......................................................................62
Monitoring the Hub Stack....................................................... 64
Displaying Port and Group Statistics.......................................................64
Displaying Segment Statistics...................................................................68
Node Trackin g................................................................................................70
Per-Port Intrusion Security.........................................................................71
Bridge Information........................................................................................71
Resetting the Hub................................................................... 72
System Reset..................................................................................................73
Factory Reset..................................................................................................74
APPENDIX A : CABLES AND CONNECTORS ............................75
100BASE-TX Ethernet Cable and Connectors........................... 75
Crossover Cables .....................................................................76
Diagnostic Port Specifications................................................. 77
RS-232 (DB9) Pin Specification.................................................................77
viii
APPENDIX B : BOOT CONFIGURATION FILE...........................79
APPENDIX C : SPECIFICATIONS ..............................................83
General................................................................................... 83
Hub-to-Hub Cascading............................................................ 84
LED Indicators....................................................................... 84
Environmental and Physical ................................................... 84
APPENDIX D : GLOSSARY .......................................................87
INDEX.........................................................................................96
ix
0 A BOUT THIS GUIDE
This guide discusses how to install and use the TE100-DM/DS series dual-speed, managed/unmanaged, stackable Ethernet/ Fast Ethernet Hubs.
Models Covered
Unmanaged Models: TE100-DS16, TE100-DS16X, TE100-DS24, TE100-DS24X.
Managed Models: TE100-DM16, TE100-DM16X, TE100-DM24, TE100-DM24X.
All “X” models include a switch module in Slot 1 of the rear panel. All “M” models are intelligent (that is, “managed”) hubs capable of managing an entire hub stack.
The model numbers also indicate how many ports a particular hub has, thus: DM16/DS16 hubs have 16 ports and DM24/ DS24 hubs have 24 ports.
Conventions
References in this manual to the TE100-DS16, TE100-DS16X, TE100-DS24, TE100-DS24X; TE100-DM16, TE100-DM16X, TE100­DM24, and TE100-DM24X hubs are frequently written simply as “hub” or “hubs” where the text applies to all models. Model numbers
About This Guide xi
Dual-Speed Stackable Hubs User’s Guide
xii
are normally used only to differentiate between them where neces­sary.
At points in this document, master models are differentiated by re­ferring to, “TE100-DM/DS series master hubs.”
Unless differentiated by model number or other specific reference, all information applies to all models.
Overview of the User’s Guide
? ?Chapter 1, Introduction. Provides information on Fast
Ethernet networks, and introduces the features of the TE100­DM/DS series hubs.
? ?Chapter 2, Unpacking and Setup. Helps you get started in
setting up the hub.
? ?Chapter 3, Understanding Indicators. Describes all LED in-
dicators on the hub’s front panel. Understanding these indicators is essential to effectively using the hub.
? ?Chapter 4, Making Connections. Provides information on
connecting to the hub’s twisted-pair and console ports, stack­ing hubs, and linking with other 100BASE-TX hubs.
? ?Chapter 5, Master Hub Setup and Management. Provides
information on using the management agent built into master models in the DH series.
? ?Appendix A, Cables and Connectors. Provides specifications
on the cables and connectors used with the hubs.
? ?Appendix B, Boot Configuration File. Describes the TE100-
DM/DS series master hub boot configuration file.
About This Guide
xiii
? ?Appendix C, Specifications. Lists the hubs’ specifications. ? ?Appendix D, Glossary. Provides the meaning for some net-
working terms used in this manual.
About This Guide
1
1 INTRODUCTION
This chapter introduces the TE100-DM/DS series dual-speed stack­able hubs, as well as giving some background information about the technology the hubs use.
Product Description
The TE100-DM/DS series dual-speed stackable Ethernet/Fast Ethernet hubs are designed to allow easy migration and integration between 10Mbps Ethernet and 100Mbps Fast Ethernet, while provid­ing manageability and flexibility in cable connections.
The TE100-DM/DS hubs can operate with either IEEE 802.3 10BASE-T connections (twisted-pair Ethernet operating at 10 meg a­bits per second), or IEEE 802.3u 100BASE-TX connections (twisted­pair Fast Ethernet operating at 100 megabits per second). All of the twisted-pair ports support NWay auto-negotiation, allowing the hub to automatically detect the speed of a network connection. This means you can connect all of your Ethernet and Fast Ethernet hosts to a TE100-DM/DS series hub stack, without any rewiring required when a host is upgraded from 10Mbps to 100Mbps.
The TE100-DM/DS series hubs, available in 16-port and 24-port models, can be stacked with up to five hubs in a stack. A stack of five 24-port hubs gives a total of 120 Ethernet or Fast Ethernet ports.
Introduction 1
Dual-Speed Stackable Hubs User’s Guide
A TE100-DM/DS series hub stack operates as a Class II Fast Ethernet repeater, allowing it to be linked to another Class II Fast Ethernet stack in the same collision domain.
In the basic configuration, the 10Mbps and 100Mbps segments are separate and do not intercommunicate. An optional switch module (included with the TE100-DS16X, TE100-DS24X, TE100-DM16X, and TE100-DM24X) can be installed in any hub in the stack, making it possible to transparently bridge between the 10Mbps and 100Mbps segments. In a managed hub stack, more than one switch module can be used to provide redundancy if the two modules are both in the primary master hub segment.
Other add-in modules are also available, providing switched 100BASE-TX, or switched 100BASE-FX connections. TE100-DM/DS series hubs each have two slots for accepting slide-in modules.
Product Features
The list below highlights the features and specifications of the TE100-DM/DS series hubs.
? ?Compatible with the IEEE 802.3 10BASE-T Ethernet and
802.3u 100BASE-TX Fast Ethernet industry standards for in­teroperability with other Ethernet/Fast Ethernet network devices.
? ?Ethernet connections support Category 3 or better twisted-pair
cables.
? ?Fast Ethernet connections support both shielded twisted pair
and Category 5 unshielded twisted-pair cables.
? ?Fast Ethernet connections support a maximum distance of 100
meters from end-station to hub, and a total network diameter of 205 meters.
Introduction 2
? ?Sixteen (TE100-DS16, TE100-DS16X, TE100-DM16, TE100-
DM16X) or twenty-four (TE100-DS24, TE100-DS24X, TE100­DM24, TE100-DM24X) NWay RJ-45 ports for connecting sta­tions to the network.
? ?Full hub stack and network management provided via a
SNMP management agent (TE100-DM16, TE100-DM16X, TE100-DM24, TE100-DM24X).
? ?An optional slide-in switch module allows bridging between
10Mbps and 100Mbps segments. Only one switch module is needed per stack, but managed hub stacks can make use of additional switch modules for redu ndancy.
? ?LED indicators for power, collisions, link, network activity,
partitioning status, disable, operating speed (10 or 100Mbps) and network utilization .
? ?Digital hub ID number front panel display. ? ?Auto-partition protection. ? ?Data collision detection and handling. ? ?Preamble regeneration, signal re-timing. ? ?Two proprietary daisy-chain ports for cascading up to five hubs
to form one logical hub; management provided via a master hub.
? ?Standby backup master capability when two master model
hubs are present within a single stack.
? ?Uplink port allows easy linking of two Fast Ethernet hub
stacks to further expand your network.
? ?Standard-size (19”, 1.25U height), rack mountable ? ?Built-in, removable power supply, replaceable without opening
the hub. Power supply is easily removed and replaced. Auto-
Introduction 3
Dual-Speed Stackable Hubs User’s Guide
4
matic voltage selection (100V to 240V, 50 or 60Hz) without fuses to change or a voltage switch to set.
? ?Optional slide-in modules: Switch, 100BASE-TX, and
100BASE-FX (see Chapter 4 : Making Connections).
Dual-Speed Ethernet Hub Technology Overview
Dual-speed Ethernet hubs have been developed to make it simpler to plan networks containing both 10Mbps Ethernet and 100Mbps Fast Ethernet technologies, especially when network hosts are being gradually migrated to new Fast Ethernet connections.
10Mbps Repeater
100Mbps Repeater
NWay Detection
RJ-45 Ports
100Mbps
Ethernet
Station
100Mbps
Ethernet
Station
10Mbps Ethernet
Station
10Mbps
Ethernet
Station
100Mbps
Ethernet
Station
A dual-speed hub is actually two repeaters in one enclosure. The 10Mbps repeater receives Ethernet transmissions from any of its ports, and retransmits them to all other ports operating at 10Mbps. Similarly, the 100Mbps repeater retransmits Fast Ethernet trans­missions from ports operating at 100Mbps to all other ports operating at the same speed.
Introduction
If there is a switch module, or a TE100-DS16X, TE100-DM16X, TE100-DS24X or TE100-DM24X hub presents in the stack, then the switch module serves as a bridge between the two indepen dent seg­ments.
10Mbps Repeater
100Mbps Repeater
NWay Detection
TE100-DSM
Switch
Module
RJ-45 Ports
100Mbps
Ethernet
Station
100Mbps
Ethernet
Station
10Mbps Ethernet
Station
10Mbps Ethernet
Station
100Mbps
Ethernet
Station
100BASE-TX Technology Overview
100Mbps Fast Ethernet Introduction
Computers today have become increasingly powerful, with the capa­bility to accommodate very sophisticated applications such as multimedia applications, video-conferencing, and CAD/CAM. To util­ize these technologically advanced applications more efficiently, there is also a growing demand for faster networks that can handle heavy network traffic.
Recognizing this need for greater bandwidth and lower latency, a variety of technologies such as FDDI, ATM, and Fast Ethernet (100Mbps) have been adopted by many vendors. Fast Ethernet tec h­nology stands out as the most inexpensive and smoothest migration
Introduction 5
Dual-Speed Stackable Hubs User’s Guide
path for existing 10Mbps Ethernet users in part because it doesn’t require a protocol translation when sharing data with 10Mbps Ethernet.
Fast Ethernet is a relatively new standard specified by the IEEE
802.3 LAN committee. It is an extension of the 10Mbps Ethernet standard with the ability to transmit and receive data at 100Mbps, while maintaining the CSMA/CD Ethernet protocol. Since Fast Ethernet is compatible with all 10Mbps Ethernet environments, it provides a straightforward upgrade without wasting the company’s existing investment in hardware, software, and trained personnel.
Cables and Connectors
Category 5 unshielded twisted-pair (UTP) cables and shielded twisted-pair (STP) cables are both supported. Category 5 UTP cable uses the same RJ-45 connector used with 10BASE-T, wired in the same configuration.
Topology
A Fast Ethernet workgroup is configured in a star topology and is built around a maximum of two repeaters. Each workgroup forms a separate LAN (also known as a segment or collision domain), and these workgroups can be easily interconnected through switches, bridges, or routers to form one LAN large enough to encompass a high-rise building or campus environment. Recent innovations in LAN hub technology such as stackable hubs, coupled with the de­creasing cost of switches, bridges, and routers, allow the design of low-cost, efficient Fast Ethernet workgroups and enterprise LANs.
The following factors strongly influence the architecture of Fast Ethernet networks:
Introduction 6
?? The EIA/TIA 568 Wiring Standard imposes a 100 meter limit
on horizontal runs of twisted-pair cables; that is, connections from the wiring closet to the end-station.
?? Fast Ethernet’s increased operational speed reduces the
maximum distance between all elemen ts of the LAN (see be­low).
?? The EIA/TIA 568 Wiring Standard does not support the use of
coaxial cables for horizontal wiring.
Network Diameter
Network diameter, which is the distance between two end-stations in the same collision domain, is the primary difference between tradi­tional Ethernet and Fast Ethernet. Due to the increased speed in Fast Ethernet and adherence to the EIA/TIA 568 wiring rules, the network diameter of a Fast Ethernet collision domain is limited to 205 meters; in contrast, the maximum 10BASE-T Ethernet collision domain diameter can be up to 500 meters.
Hub Types
Unlike 10BASE-T hubs which are all functionally identical, Fast Ethernet hubs are divided into two distinct types: Class I and Class II. A Class I hub repeats all incoming signals on one port to the other ports by first translating them to digital signals and then re­translating them back to line signals. These translations are necessary when connecting various network media to the same colli­sion domain, such as when combining two wire-pair 100BASE-TX media with four wire-pair 100BASE-T4 media. Only one Class I hub can exist within the same collision domain, thus this type of hub cannot be directly inter-linked. A Class II repeater, on the other hand, immediately repeats all incoming line signals on one port to the other ports; no translations are performed. This type of hub con­nects identical media within the same collision domain; for example,
Introduction 7
Dual-Speed Stackable Hubs User’s Guide
TX to TX. At most, two Class II hubs can exist within the same col­lision domain.
As mentioned earlier, stackable Class II hubs can be used to increase the number of available nodes in a collision domain. An entire hub stack counts as a single repeater. TE100-DM/DS series hubs are Class II devices.
Introduction 8
2
2 U NPACKING AND
S ETUP
This chapter provides information on the unpacking and initial in­stallation of your hub stack.
Unpacking
Open the shipping carton of your hub and carefully unpack the con­tents. The carton should contain the following items:
? ?One dual-speed stackable hub ? ?One AC power cord, suitable for your area’s electrical power
connections
? ?One daisy-chain cable ? ?Four rubber feet to be used for shock cushioning ? ?Six screws and two mounting brackets ? ?Management module diskette (master models only) ? ?This User’s Guide
Unpacking and Setup 9
Dual-Speed Stackable Hubs User’s Guide
Inspect the hub and all accompanying items. If any item is damaged or missing, report the problem to your dealer.
Identifying External Components
This section identifies all the major external components of the hub. Both the front and the rear panels are shown, followed by a descrip­tion of each panel feature. The indicator panel is described in detail in the next chapter.
Front Panel
TE100-DM24 / TE100-DM24X Front Panel
TE100-DS24 / TE100-DS24X Front Panel
TE100-DM16 / TE100-DM16X Front Panel
TE100-DS16 / TE100-DS16X Front Panel
Unpacking and Setup 10
? ?LED Indicator Panel Refer to the next chapter, Understanding Indicators, for detailed
information about each of the hub’s LED indicators.
? ?Twisted-Pair Ports Use any of these ports to connect stations to the hub. The ports
are MDI-X Nway ports, which means you can use ordinary straight-through twisted-pair cable to connect the hub to PCs, workstations, or servers through these ports, and the speed of the connection will be detected automatically. If you need to connect to another device with MDI-X ports such as another hub or an Ethernet switch, you should use a crossover cable, or connect us­ing the Uplink port (described below). For more information about crossover connection, see the Crossover Cables section on page 76.
? ?Uplink Port The Up-link port is an MDI port, which means you can connect
the hub (or hub stack) to another device with MDI-X ports using an ordinary straight-through cable, making a crossover cable un­necessary.
Port 1 and the Up-link port are the same logical port, except
their pin-outs are different. Do not use both Port 1 and the Up-link port at the same time.
Unpacking and Setup 11
Dual-Speed Stackable Hubs User’s Guide
Rear Panel
(Note that the figure shows the rear panel for “Master” model.) ? ?Module Slots Used to install module options for various kinds of additional con-
nections, as well as the switching 10Mbps/100Mbps bridge module. (In the TE100-DS16X, TE100-DM16X, TE100-DS24X and TE100-DM24X, module slot 1 is already occupied by the “switch module” which is standard on these models.)
? ?Daisy-Chain IN Port When cascading a set of stackable dual-speed hubs, this port
should be connected to the Daisy-Chain OUT port of the prev ious hub in the stack (usually placed immediately above it). A cascade of five hubs can be created in this way. The first and last hubs in the stack use only one of the daisy-chain ports, while the others use both.
? ?Daisy-Chain OUT Port Works in conjunction with the Daisy-Chain IN Port (see above).
Connect this port to the Daisy-Chain IN Port of the next hub in
Unpacking and Setup 12
the stack (usually placed immediately below it), using the en­closed daisy-chain cable.
? ?Diagnostic (Console) Port -- Master Models Only This 9-pin serial connector is used for connecting a console to the
TE100-DM/DS series master hubs for out-of-band management of this particular hub or the entire stack.
? ?Fan Provides air circulation and heat dissipation. Be sure to leave
adequate space at the rear of the unit for proper ventilation.
? ?AC Power Connector For the power cord.
Installing the Hub
Installation
The site where you install the hub stack may greatly affect its per­formance. When installing, consider the following pointers:
? ?Install the hub stack in a fairly cool and dry place. See Ap-
pendix D, Specifications, for the acceptable temperature and humidity operating ranges.
? ?Install the hub stack in a site free from strong electromagnetic
field generators (such as motors), vibration, dust, and direct exposure to sunlight.
Unpacking and Setup 13
Dual-Speed Stackable Hubs User’s Guide
14
? ?Leave at least 10cm of space at the front and rear of the hub
for ventilation. For more information see, “Environmental and Physical” on page 84.
? ?Install the hub on a sturdy, level surface that can support its
weight, or in an EIA standard-size equipment rack. For in­formation on rack installation, see the next section, Rack Mounting.
When installing the hub stack on a level surface, attach the rubber feet to the bottom of each device. The rubber feet cushion the hub and protect the hub case from scratching.
Rack Mounting
The hub can be mounted in an EIA standard-size, 19-inch rack, which can be placed in a wiring closet with other equipment. Attach the mounting brackets at the hub’s front panel (one on each side),
and secure them with the pr ovided screws.
Then, use screws provided with the equipment rack to mount each hub in the rack.
Unpacking and Setup
Replacing the Power Supply
The hub comes with a removable power supply for easy replacement. In the unlikely event that the power supply fails or is damaged, fol­low the steps below to replace it:
1. Disconnect the power cord from the AC outlet.
2. Disconnect the power cord from its connector on the rear of the
hub.
3. Using a Phillips screwdriver, remove the screws securing the
power supply to release the unit.
4. Remove the power supply by sliding it out the rear of the chas-
sis. Do not plug in the power supply when it is outside the chassis! Doing so could cause personal injury or damage to the power supply.
Unpacking and Setup 15
Dual-Speed Stackable Hubs User’s Guide
5. Slide the replacement power supply into the chassis, engaging
the connector carefully.
6. Attach the power cord to the connector of the power supply and
connect the other end of the power cord to the AC supply source.
Unpacking and Setup 16
3
3 U NDERSTANDING
INDICATORS
Before connecting network devices to the hub, take a few minutes to look over this section and familiarize yourself with the front panel LED indicators of your dual-speed hub, depicted below.
TE100-DM24 / TE100-DM24X Indicator Panel
TE100-DM16 / TE100-DM16X Indicator Panel
TE100-DS24 / TE100-DS24X Indicator Panel
Understanding Indicators 17
Dual-Speed Stackable Hubs User’s Guide
TE100-DS16 / TE100-DS16X Indicator Panel
Hub State Indicators
? ?Power Indicator This indicator lights green when the hub is receiving power ; oth-
erwise, it is off.
? ?Collision Indicators (COL10 and COL100) These indicators indicate data collisions on the respective 10Mbps
Ethernet or 100Mbps Fast Ethernet segments of the hub. (If sev­eral hubs are stacked or linked together, all of them should detect and indicate the same collision, since collisions span the entire network segment.) Whenever a collision is detected, the respec­tive COL indicator will briefly blink amber.
Understanding Indicators 18
? ?Segment Utilization % (10Mbps and 100Mbps) The utilization bar graphs provide a quick reference on the cur-
rent traffic load relative to the total available 10Mbps or 100Mbps network bandwidth. The graphs display a measure of the per­centage of bandwidth in use on the respective network segment. All data packets are counted, whether valid or not.
? ?Hub ID Indicator The Hub ID readout shows the ID (group) number of the hub
within the hub stack. The first time a hub is powered on within a hub stack, the master hub in the stack assigns that hub an available ID number which is then added to each hub’s factory se­rial number (encoded on an EEPROM memory chip). The hub ID is then permanently assigned.
In an unmanaged stack (all slave models), all IDs will read “0”
and no permanent ID assignment is made. In a stack with a master (intelligent) model, the master hub will detect the other hubs in the stack and automatically assign ID numbers which are then permanently saved by each hub.
Module Indicators (SLOT1 & 2)
The two module indicators, SLOT1 and SLOT2, indicate a good link to a module installed in the respective slot. For the switch module the indicator will come on when the module is installed. For other modules, the slot link indicator should light whenev er the module is installed and there is a valid link.
Understanding Indicators 19
Dual-Speed Stackable Hubs User’s Guide
Port State Indicators
There is one port state indicator for each of the twisted-pair ports on the hub. Each port? LED status indicator reports the port? link
and activity status, and shows whether or not the port has been par­titioned.
The following describes each indicator and the meaning of each con­dition:
? ?Link (green)
The indicator of a port lights green when the port is connected to
a powered Ethernet or Fast Ethernet station. If the station to which the hub is connected is powered off, or if there is a problem with the link, the LED will remain off.
? ?Receive (blinking green)
When information is received on a port, its indicator will blink off
briefly. Upon reception, the data will be transmitted to all other connected ports.
? ?Auto-partition (blinking amber) The indicator of a port blinks amber when the port is automati-
cally partitioned due to an abnormal network condition.
The hub will temporarily partition a port when too many line er-
rors or too many collisions are detected on the port. While the segment is automatically partitioned, the port will be isolated from the rest of the network segment. When the problem is cor­rected or a valid data packet is received through the port, the port is automatically reconnected.
? ?Disabled (steady amber)
Understanding Indicators 20
The indicator of a port is orange when the port has been manually
disabled. No packet transmission or reception can occur on the port.
If there is a TE100-DM16, TE100-DM16X, TE100-DM24, or
TE100-DM24X master hub in the stack, then ports can be manu­ally disabled and enabled via the on -board console interface or via an SNMP -based network management pr ogram. You can choose to partition a port even when there is nothing wrong with it, for example, to prevent a certain device from accessing the network.
SNMP Indicator
(Master models only.) This indicator comes on when the SNMP agent of a TE100-DM/DS
series master hub is active. In a stack with both a Primary and a Backup Master, the SNMP LED of the Primary master will be lit and will flash to indicate SNMP activity. The SNMP LED of the Backup Master will remain off at all times.
Port Speed Indicators
There is also a port speed indicator for each of the twisted-pair ports on the hub. The port? speed indicator should light green when a
100BASE-TX device is connected to the port, it will remain dark if the port is unconnected or if a 10BASE-T device is connected.
Understanding Indicators 21
Dual-Speed Stackable Hubs User’s Guide
Console Port Indicator (CON)
(Master models only.)
This indicator lights continuously under the following two conditions:
1. A good connection has been established with a console (for ex­ample, a PC or other computer). The diagnostic port of a TE100-DM/DS series master hub must be connected to the console's RS-232 serial port using a normal serial cable.
OR
2. The console computer is on -line and connected to the on-board console program either through terminal emulation or a TELNET session.
Refer to Chapter 4, Making Connections, for directions on establish­ing a connection with the diagnostic port, and Chapter 5, Master Hub Setup and Management, for information about how to use the console interface.
Understanding Indicators 22
4
4 MAKING C ONNECTIONS
This chapter discusses how to make connections to the hub’s? twisted-pair ports and console port, cascading hubs to create a stack,
and linking with other hubs (or hub stacks).
Hub Cascading/Building a Stack
You can stack up to five hubs using the daisy-chain ports to form one logical hub. In this configuration, the interconnected hubs constitute a single logical unit, providing a maximum of 120 twisted-pair ports.
Use the provided daisy-chain cable to connect the Daisy-Chain OUT port on the rear panel of one hub to the Daisy-Chain IN port on the hub below it, as shown in the figure below. Repeat this pr ocedure for each hub to be included in the stack.
Each time a new hub is added to the stack, all hub IDs will tempo­rarily revert to 0, indicating a system reset. After the reset, the hub IDs should return to their previous values.
Making Connections 23
Dual-Speed Stackable Hubs User’s Guide
24
Hubs should not be added to the stack or removed from the stack while the power is on at any hub in the stack.
Note: Always turns off power to the entire
stack before adding or removing hubs.
Making Connections
Connectivity Rules
Ethernet (10Mbps) networks have the following connectivity rules: ? The maximum length of a twisted-pair cable segment is 100
meters. Cabling should be Category 3 or better (Category 5 for 100Base-TX connections).
? Between any two end-stations in a collision domain, there may
be up to five cable segments and four intermediate repeaters (hubs, hub stacks, or other repeaters).
? If there is a path between any two end-stations containing five
segments and four repeaters, then at least two of the cable segments must be point-to-point link segments (e.g., 10BASE­T or 10BASE-FL), while the remaining segments may be popu­lated (mixing) segments (e.g., 10BASE-2 or 10BASE-5).
Fast Ethernet (100Mbps) networks have the following connectivity rules:
? The maximum length of a twisted-pair segment (that is, the
distance between a port in the hub to a single-address network device such as a PC, server, or Ethernet switch) is 100 meters. Cabling and other wiring should be certified as Category 5 UTP or shielded twisted-pair (STP).
? The maximum diameter in a collision domain is about 205
meters using two Class II hubs (or hub stacks).
? Between any two end-stations in a collision domain, there may
be up to three cable segments and two Class II hubs or hub stacks.
Making Connections 25
Dual-Speed Stackable Hubs User’s Guide
The Diagnostic Port
The diagnostic port on the rear panel of the master hub is used to establish a connection with a device to allow out-of-band manage­ment of the TE100-DM/DS series hubs stacked with it. The console device connected to the diagnostic port can be a terminal (or a com­puter running terminal-emulating software) or a PC running TCP/IP TELNET .
Diagnostic Port Connection
The diagnostic port is an RS-232 DCE interface. To establish a physical line connection with an RS-232 serial port (DTE) on a PC acting as a console, all you need is a straight serial cable, as shown in below. Note that a DCE-to-DTE connection requires a straight serial cable, not a null-modem cable.
You can use the diagnostic port on a TE100-DM/DS series master hub to connect a VT100-compatible terminal or a computer running an ordinary terminal emulation program (such as the Terminal Pro­gram included with the Windows operating system). In all cases, your terminal parameters will need to be set to:
? VT-100/ANSI compatible, ? Arrow keys enabled, ? 9600 baud, ? 8 data bits, ? No parity, ? 1 stop bit.
Making Connections 26
You can also access the same functions over a TELNET link. Once you have set an IP address for your hub (see the beginning of this chapter), you can use a TELNET program (in a VT -100 compatible terminal mode) to access and control the hub. All of the screens are for the most part identical, whether accessed from the diagnostic port or from TELNET.
A console device can manage a TE100-DM/DS series master hub operating in a stack master or stand-alone master role. Use the on-board console program for out-of-band management or a SNMP management software for in-band or out-of-band management.
A console device can only manage a TE100-DM/DS series hub if it is cascaded to a TE100-DM/DS series master hub. Use either the on-board console program or an SNMP-based network manage­ment program to manage the stack.
Hub to End-Station Connection
After installing the hub properly, it can support up to sixteen (TE100-DS16, TE100-DS16X, TE100-DM16, TE100-DM16X) or
Making Connections 27
Dual-Speed Stackable Hubs User’s Guide
twenty-four (TE100-DS24, TE100-DS24X, TE100-DM24, TE100­DM24X) end-station connections. Fast Ethernet connections require either a Category 5 UTP cable or a STP cable. These cables can be up to 100 meters long.
Each Ethernet connection requires a Category 3 or better UTP cable. It is recommended that you use Category 5 cabling for all connec­tions. This makes it easier to upgrade all stations to 100Mbps.
You can connect any combination of PCs, servers, and other single­address network devices to the twisted-pair ports using straight­through twisted-pair cables. These cables should not be crossed over. The following figure illustrates the pin assignments for a straight­through cable:
When connecting a PC or a server, the system being connected should have an Ethernet or Fast Ethernet network interface card with a twisted-pair port. The following figure shows a typical con­nection between the hub and end-stations:
Making Connections 28
Hub-to-Hub Uplink
You can link two hubs or hub stacks to each other using any of the twisted-pair ports or the Up-link port. Linking hubs using ordinary twisted-pair ports requires crossover twisted-pair cables; linking us­ing one ordinary twisted-pair port and the Up-link port requires an ordinary straight-through twisted-pair cable. The Up-link port is shared with Port 1, and you should not use both Port 1 and the Up­link port at the same time.
When connecting two hubs or hub stacks in this fashion, the maxi­mum distance between any two end-stations in a collision domain is 205 meters. If each link between the hub and an end-station is 100 meters, then the hub-to-hub connection is limited to 5 meters. How­ever, if the longest hub-to-end-station connection is less than 100 meters, then the hub-to-hub connection can be up to 100 meters as long as 205-meter total network diameter rule is followed.
The following table describes different methods of linking hubs (or hub stacks):
Making Connections 29
Dual-Speed Stackable Hubs User’s Guide
HUB PORT USED
Normal Switch or
Uplink Straight-Through (||) Server (or PC) Straight-Through (||) Uplink Switch or
Uplink Crossover (X) Server (or PC) Crossover (X)
A crossover cable is a straight-through twisted-pair cable in which the wires have been crossed. The figure below shows the pin as­signments for an Ethernet or Fast Ethernet crossover cable:
DEVICE PORT
TYPE
Non-
Hub
Hub
Uplink
Non­Uplink
CABLE TO USE
Crossover (X)
Straight-Through (||)
NOTE: The first twisted-pair port (Port 1) is logically
shared with the Up-link port. If you connect a hub to the Up-link port, then do not use Port 1.
Making Connections 30
Optional Module Connections
There are three optional modules that may be added to any of the TE100-DM/DS series hubs. Each hub can accommodate two mod­ules. Each of the modules offers a different additional network interface that allows for greater flexibility in how these hubs may be used in a network.
The sections that follow provide a brief overview of the module and basic instructions on any settings and indicators.
Module Installation
The installation procedure for each module is the same. Additional information about each module is provided below.
To install any of the modules:
1. Locate one of the module slots in the hub’s rear panel. (Note
that the TE100-DSM Switch Module can only be installed in Slot 1 – the center slot.)
2. Using a screwdriver, undo the two screws and remove the dust
cover on the module slot.
3. Holding the module component-side up and connector-side in,
gently slide the module along the guides and seat it in the inter­nal connector.
4. Using a screwdriver, replace the two screws and tighten until
snug.
Making Connections 31
Dual-Speed Stackable Hubs User’s Guide
We recommend that you retain the dust cover in case you need to remove the module for an extended period sometime in the future.
Switch Module
The switch module is used to allow interconnection between the 10Mbps and 100Mbps segments in the hub or hub stack. Each hub stack should have one switch module (such as the one included in the TE100-DS16X, TE100-DM16X, TE100-DS24X or TE100-DM24X) to allow 10Mbps and 100Mbps stations to intercommunicate. Note that the switch module can only be installed in Slot 1 – the center slot. Also the presence of switch modules and their operational status can be viewed on the ”Network Monitoring – Bridge Information” screen.
NOTE: In a stack containing a TE100-DM16,
TE100-DM24, TE100-DM16X, or TE100­DM24X intelligent master hub, more than one switch module may be used to provide increased reliability through redundancy. The Spanning Tree Protocol implemented in the management agent can control the switch modules to provide link redundancy and prevent network loops but only when
Making Connections 32
multiple modules are installed in hubs on the primary master segment.
Fiber Optic Module
The Fiber Optic module provides a standard Fast Ethernet 100BASE-FX fiber optic connector. A fiber optic connection of this kind is particularly useful for creating a link between two TE100­DM/DS series hub stacks, placing them in separate collision do­mains. A link of this sort eliminates the need for an external switch to divide stacks into separate domains. Dividing the stacks into separate collision domains overcomes the Fast Ethernet two-repeater limitation, and effectively doubles overall bandwidth.
The Fiber Optic module includes the following LED indicators: ?? Power/Tx? this LED is lit when the hub is on and blinks when
the module is transmitting packets.
?? Link/Rx? this LED is lit when the fiber optic ports are properly
connected to a powered-on device and blinks when the module is receiving packets.
?? Collision? this LED blinks when there are packet collisions on
the fiber optic link.
Making Connections 33
Dual-Speed Stackable Hubs User’s Guide
34
?? FDX? this LED is lit when the fiber optic port is set for Full
Duplex transmit and receive. When the LED is off, the fiber op­tic port is in Half Duplex mode.
The duplex mode DIP switch allows you to set the fiber optic lines to Full Duplex mode operation. Only the right-hand switch (number 2) is active. Use it to set the duplex mode.
Fast Ethernet Module
The Fast Ethernet module provides one additional twisted-pair Fast Ethernet connection. A twisted-pair connection of this kind is par­ticularly useful for creating a link between two TE100-DM/DS series hub stacks, placing them in separate collision domains. A link of this sort eliminates the need for an external switch to divide stacks into separate domains. Dividing the stacks into separate collision do­mains overcomes the Fast Ethernet two-repeater limitation, and effectively doubles overall bandwidth.
The Fast Ethernet module uses a MDI-X connector (not a straight MDI) and, therefore, a crossover cable must be used when connecting the module to another module (and under most other circumstances). See Appendix A for pin-out information.
The Fast Ethernet module includes the following LED indicators: ?? Power/Tx? this LED is lit when the hub is on and blinks when
the module is transmitting packets.
?? Link/Rx? this LED is lit when the port is properly connected to
a powered-on device and blinks when the module is receiving packets.
Making Connections
?? Collision? this LED blinks when there are packet collisions on
the module line.
?? FDX ? this LED is lit when the port is set for Full Duplex
transmit and receive. When the LED is off, the port is in Half Duplex mode.
NOTE: Because the Fast Ethernet module? port is
a NWay UTP port, once the hub is powered on, it will automatically detect the duplex and speed modes of any device connected to it. The DIP switch may then be set to force the duplex mode into a particular state. After the DIP switch is set, the module will only oper­ate at 100Mbps in the duplex mode selected.
The duplex mode DIP switch allows you to set the port to Full Du­plex mode operation. Only the right-hand switch (number 2) is active. Use the DIP switch to set the duplex mode.
Making Connections 35
5
5 MASTER H UB SETUP
AND MANAGEMENT
The TE100-DM16, TE100-DM16X, TE100-DM24, and TE100­DM24X master hubs (hereafter and elsewhere referred to as “SNMP master hubs”) provide an on -board console program that allows you to set up and control all TE100-DM/DS hubs stacked with it. This program can be accessed either with an ordinary terminal (or terminal emulator) or over the network using the TCP/IP TELNET protocol. You can use this program to perform many basic network management functions.
The console program also allows you to prepare the hub for man­agement using an SNMP-based network management system. This chapter describes how to use the console pr ogram to access the hub, change its settings, and monitor its operation.
Note that if you want to manage the hub in-band you need to fol­low the instructions in the first section of this chapter (below) to prepare the hub for in-band management. If you need informa­tion about connecting a console device to the diagnostic port for out-of-band management, see the relevant sections of Chapter 4.
Master Hub Setup and Management 37
Dual-Speed Stackable Hubs User’s Guide
Navigation and Co nventions
This section describes how to navigate the master hub manage­ment software and the conventions used in that software.
Navigation
The Tab keys move the cursor from field to field. Note that they are uni-directional (i.e., Shift+Tab is not a functional combina­tion). Up and Down arrow keys allow cursor movement between some fields.
The Spacebar is a toggle switch for all variables that can be changed but wherein possible values are preset.
The Delete and Backspace keys remove entered text as in most software packages.
Pressing Ctrl-r refreshes the current screen.
Screen Conventions
A colon(“:”) precedes fields that cannot be changed. Toggle changed fields are surrounded by angle brackets <>. Variables with values that must be keyed-in are surrounded by
square brackets []. Uppercase letters are reserved for command items such as SAVE
or LOGOFF. Highlighting the item and pressing Enter activates the command.
Note: Both the navigation and screen conven-
tions information can be obtained under HELP in the system management soft­ware.
Master Hub Setup and Management 38
In-Band Setup Instructions
This section describes how to setup the hub for in-band manage­ment.
Getting Started
Physically install and cascade the hubs and power on the hub stack according to the directions in other parts of this manual. At this point, the hub stack is ready for use as an ordinary unmanaged repeater.
The master hubs in the series come without IP addresses as­signed (IP = 0.0.0.0). Without a valid IP address, the master hub will show a POST error indication and repeatedly restart itself once every minute or so. If you want to manage your hub using a network management system, you will have to assign an IP ad­dress to the hub. There are two different ways to configure the hub with a new address, as described below.
Assigning an IP Address Using BOOTP
If your Fast Ethernet network has a BOOTP (BOOTstrap Proto­col) server, you can add the hub’s Ethernet (MAC) address (which is printed on a sticker on the bottom of the hub, or you can obtain it using the master hub console interface), IP address, subnet mask, and boot filename to your BOOTP server’s configuration tables. The boot filename field of the hub’s BOOTP configuration should contain the filename of a TE100-DM/DS series master hub boot configuration file accessible on your local TFTP (Trivial File Transfer Protocol) server. This file can be empty. For more de­tailed information about the boot configuration file contents, see Appendix C : Boot Configuration File of this manual.
Assigning an IP Address Using the Diagnostic Port
To assign an IP address manually,
Master Hub Setup and Management 39
Dual-Speed Stackable Hubs User’s Guide
1. Connect a VT -100 compatible terminal or a personal com-
puter running a VT-100 compatible terminal emulation program to the DB-9 console port at the rear of the master hub. The cable should be an ordinary RS-232C cable. The terminal communications parameters should be set to 9600bps, 8 bits, no parity, and 1 stop bit.
2. As the hub begins its boot process, hit Control-C to enter
the PROM System Menu.
3. Choose TCP/IP Parameters Configuration, and enter a
valid IP address, network mask, and (optional) gateway router IP address. Choose SAVE and press <Enter> to let the changes take effect, and then choose EXIT.
4. If you will not be using TFTP to download a hub configura-
tion file, choose Software Update and toggle the Software Update Control to “Disable” using the Space Bar. Again, choose SAVE and then EXIT.
5. Choose Execute Bootstrap to restart the hub.
You are now ready to use your TE100-DM/DS series hub stack, and to manage it from a network management station on your network. See the Stack Management User’s Guide for more in­formation about how to manage the stack using a network management pr ogram.
Backup Master Function
Within a TE100-DM/DS series hub stack, in addition to a master hub for management purposes, a standby backup master can also be installed. If a hub stack has two master units, the first pow­ered-on Master unit or the unit that is higher in the stack will
Master Hub Setup and Management 40
manage the stack and be designated as the ”Primary Master.” Master hubs in the series include a built-in contention algorithm which determines which hub will manage the stack and which will operate in standby mode. If, during power -on, the two master hubs in the stack both attempt to initialize as the Primary Mas­ter, this collision will result in an automatic stack reset indicated by all hub ID numbers changing to 0 temporarily. If the current Primary Master Hub fails or loses power, the standby master will take over and manage the hub stack.
Segmenting Hubs
Switching hub technology has made it more common to segment local area networks into smaller pieces to reduce congestion. Segmenting makes it easier to balance network loads, since fewer users are sharing the available bandwidth.
A hub stack makes network management convenient, but too many stations on a single network segment may give slow re­sponse at peak network loads. Therefore, this hub series provides a way to segment hubs from the stack into their own collision domains. Segmenting hubs can be accomplished with a simple management command and does not require any hardware or wir­ing changes.
Though the hubs continue to be cascaded together and are man­aged as a single unit, each hub can either be a part of the collision domain of the rest of the stack, or can be separated into its own network segment. These separate segments can be bridged by connecting them through a compatible switching hub.
Master Hub Setup and Management 41
Dual-Speed Stackable Hubs User’s Guide
The figure above shows an unsegmented hub stack. All hubs in the stack are in the same collision domain because they are con­nected together through the daisy-chain ports.
The figure below shows a stack of hubs that is divided into three separate collision domains. Hub three and four are isolated from the main segment (collision domain one) using the hub's segmen­tation capability, putting them into their own isolated collision domains two and three respectively. A switch, bridge or router can be used to connect the three collision domains so that traffic can pass between them, yet keeping them isolated to reduce con­gestion on each segment.
For information about segmenting hubs using the network man­agement module for the hub, see the ”Hub Stack Management: Controlling Hubs in the Hub Stack” section later in this chapter.
Master Hub Setup and Management 42
NOTE: Hub Segmentation is controlled by the
master hub. When the master hub com­pletes its initialization, it will restore any prior segmentation of the hubs. There­fore, if you are using a switch or bridge to join different segments, be sure to enable the IEEE 803.1d Spanning Tree Protocol to prevent temporary network loops
Logging in to the Hub Console
The TE100-DM/DS series master hubs support user-based secu­rity that allows you to prevent unauthorized users from accessing the hub or changing its settings. This means that before you can access the functions of the hub, you will need to first log into the hub, providing a password. This section tells how to log onto the hub, and how to change your password.
Logging In
When you first connect to the hub, it will display the login screen:
Master Hub Setup and Management 43
Dual-Speed Stackable Hubs User’s Guide
44
To log in, complete these steps:
1. Type in your user name and press <Enter>.
2. Type in your password and press <Enter>.
3. With the cursor on the OK selection, press <Enter>.
NOTE: When the hub is shipped, the default user
name is TREND, and the default pass­word is also TREND. You will need to use this user name and password when you first set up your hub or if you use the Fac­tory Reset NVRAM to Default Value menu selection. Change this user name
and password to protect the security of your hub.
There are two levels of user privilege: Super User and General User. The default user (TREND) has Super User privileges. Some functions available to Super Users are not available to Gen­eral Users. The main menu below is the menu for Super Users:
Master Hub Setup and Management
Changing Your Password
To change your user password, follow these steps:
1. Choose User Account Change from the main menu.
2. Select Change Password. The following screen will be
displayed:
Master Hub Setup and Management 45
Dual-Speed Stackable Hubs User’s Guide
Type in your user name and press <Enter>.
3. Type in your old password and press <Enter>.
4. Type in the new password you have chosen, and press <En-
ter>. Type in the same new password again in the next blank space to verify what you typed.
5. Choose SAVE to put the new password into effect.
6. Choose EXIT to exit this screen.
This method can also be used by a Super User to change another user’s password.
Master Hub Setup and Management 46
Setting Up the Master Hub
This section describes how to set the hub’s console parameters for various management options it supports. Note that the hub can be managed in-band or out-of-band, and either through the built­in console program , or using an SNMP-management program.
TCP/IP Settings
The hub needs to have an IP address assigned to it so that the network management system or TELNET client can communi­cate with it over the network. The TCP/IP Parameters Configuration Menu allows you to change the settings for the two different interfaces used by the hub: the internal Fast Ethernet interface used for in-band communication, and the SLIP interface used through the diagnostic port for out-of-band communication.
Note: if you need to set an IP address so that you can access the hub console through a network, please see the first section of this chapter.
Saved changes to any of the fields on this menu take effect the next time the system is restarted. Fields that can be set include:
? ?Interface. This parameter displays the type of interface the
hub will use for management communications.
? IP Address. This parameter determines the IP address
used by the hub for receiving SNMP and TELNET mes­sages. The address should be of the form xxx.xxx.xxx.xxx, where each xxx is a number (represented in decimal) be­tween 0 and 255. This address should be a unique address on the network assigned to you by a network administrator. The same IP address is shared by both the SLIP and Ethernet network interfaces.
Master Hub Setup and Management 47
Dual-Speed Stackable Hubs User’s Guide
? Subnet Mask. This parameter sets the subnet mask that
determines the level of the subnet that the hub is on. It should be of the form xxx.xxx.xxx.xxx, where each xxx is a number (represented in decimal) between 0 and 255. If no subnetting is being done, the value should be 255.0.0.0 for a Class A network, 255.255.0.0 for a Class B network, and
255.255.255.0 for a Class C network.
? Default Gateway. This parameter specifies the IP ad-
dress for a gateway or a router where frames with destinations outside the current subnet should be sent. If your network is not part of an inter -network, or you do not want the hub to be accessible outside your local network, you can leave this field blank.
? Send BOOTP Request upon Power Up. This parame-
ter determines whether or not the hub should send out a BOOTP request when it is powered up. The BOOTP pr oto­col allows IP addresses, network masks, and default gateways to be assigned from a central BOOTP server; if this option is set to “Yes”, the hub will first look for a BOOTP server to provide it with this information before us­ing local settings.
Master Hub Setup and Management 48
The default setting for all TCP/IP variables is 0.0.0.0.
Out-of-Band Management and Console Settings
You can use the Out-of-Band/Console Setting menu to choose whether to use the hub’s RS-232 serial port for console manage­ment or for out-of-band TCP/IP communication using SLIP , and to set the baud rate used for SLIP communications.
The following fields can be set: ? System Restart Out-of-Band Baud Rate. This pa-
rameter determines the serial port baud rate that will be used the next time the hub is restarted. It applies only when the serial port is being used for out-of-band (SLIP) management; it does not apply when the port is used as a console port. Available speeds are 1200, 2400, 9600, and 19200 bits per second.
Master Hub Setup and Management 49
Dual-Speed Stackable Hubs User’s Guide
? Out-of-Band Dial-Up Phone Number . This information
is stored as a reference for the benefit of the system man­ager and does not cause the hub to dial out.
? System Restart Serial Port Setting. This parameter
determines whether the serial port should be used for out-of­band (SLIP ) management or for console management, start­ing from the next time the hub is restarted. It can be set to either “Console” or “Out-of-Band.”
Software Update on Boot
The hub is capable of obtaining its boot-time configuration infor­mation, as well as updated versions of its internal firmware, using TFTP (the Trivial File Transfer Protocol) and BOOTP (the BOOT strap Protocol). You can use the Software Update menu to control this feature.
The fields you can set on this menu are:
Master Hub Setup and Management 50
? Software Update. This parameter determines whether or
not the hub will try to look for the configuration file over the network. If set to Disable, the parameters below become ir­relevant.
? Software Update Mode. This variable can be set to ei-
ther Network or Out-of-band. Determines whether the configuration file should be obtained through the Ethernet network or through the console port.
? Boot Protocol. This parameter can be set to either TFTP
ONLY or BOOTP & TFTP. Applies only if the S/W Update control is enabled.
? Boot Server IP Address. This variable is the IP address
of the TFTP server where the configuration file is located. This entry is used only if the S/W Update Control is en- abled and your boot protocol is TFTP only ; if you are using BOOTP&TFTP mode, or if Send BOOTP Request on Power Up is enabled, the address will be obtained from the BOOTP server.
? Boot File Name. The pathname of the configuration file
on your TFTP server. Normally, this is the pathname of the .CFG file on your hard disk. This entry is used only if your boot protocol is TFTP ONLY; if you are using BOOTP & TFTP mode, or if Use BOOTP to get IP after start up is enabled, the pathname will be obtained from the BOOTP server. For more information about the TE100-DM/DS Se­ries Master Hub configuration file, please see Appendix C, Boot Configuration File.
Master Hub Setup and Management 51
Dual-Speed Stackable Hubs User’s Guide
SNMP Information
The System Configuration Menu screen shows a variety of infor­mation about your hub, and allows you to set the System Name, System Location, and System Contact. These settings can be re­trieved from the hub using SNMP requests, allowing them to be used for network management purposes. Each of these fields is restricted to 64 characters:
? System Name. This parameter corresponds to the MIB-II
object sysName, and is used to assign a name to the hub for administrative purposes. The hub’s domain name is often used, provided a name has been assigned.
? System Location. This parameter corresponds to the
MIB-II object sysLocation, and is used to indicate the physi­cal location of the hub for administrative pu rposes.
? System Contact. This parameter corresponds to the
MIB-II object sysContact, and is used to note the name and
Master Hub Setup and Management 52
contact information of the person responsible for adminis­tering the hub.
? Display Timeout. An additional setting, the console
time-out, may be used to automatically log out the console interface after a predetermined period of inactivity. This feature increases hub security by preventing access to the hub after the interface has been inadvertently left logged on. A setting of 0 disables this feature.
SNMP Traps
The hub sends out SNMP traps to network management stations whenever certain exceptional events occur, such as when the hub is powered on or when an SNMP request is made using an un­known community name. An SNMP trap sent to another network management site provides a warning about, for example, an attempted unauthorized access to the network or hub, or changes to a network hub’s configuration that may effect other
Master Hub Setup and Management 53
Dual-Speed Stackable Hubs User’s Guide
54
parts of the network. Traps are sent only to selected network management hosts. The hub allows up to four different hosts to receive traps from the system.
The following trap parameters can be set: ? IP Address. This parameter specifies the IP address of the
network management station which will receive traps from the hub.
? SNMP Community String. This parameter specifies
the SNMP community name to be included in the trap re­quest.
? Status. This determines whether this trap entry is valid
or invalid. You can delete an entry by changing its status to Invalid.
Master Hub Setup and Management
SNMP Security (Community Names)
SNMP (version 1) implements a rudimentary form of security by requiring that each request includes a community name. A community name is an arbitrary string of characters used as a ”Password” to control access to the hub. If the hub receives a re­quest with a community name it does not recognize, it will trigger an authentication trap, provided this feature has not been dis­abled.
The TE100-DM/DS series master hubs allow up to four different community names to be defined, and the access rights for each community can be separately set to either read only or read/write. The status for each string can be toggled to either valid or invalid. The community names public and private are defined by default; you can change these names in addition to adding others. You will need to coordinate these names with the community name settings you use in your network management system.
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Dual-Speed Stackable Hubs User’s Guide
Adding and Deleting Users
Access to the console program, whether using the diagnostic port or TELNET, is controlled by user names and passwords. Up to three user names can be defined. One user, named TREND, is defined by default; this user name can be removed if desired. However, the console program will not let you delete the currently logged-in user to prevent you from accidentally deleting all users with Super User privileges – making it impossible to change im­portant hub settings.
Only users with Super User privileges can add and delete users.
Add a User
To add a new user, perform these steps:
1. Choose User Account Change from the main menu. The
following screen will appear:
Master Hub Setup and Management 56
2. Choose Create New User fr om the User Account Change
menu.
3. Enter the new user name, and assign an initial password.
Determine whether the new user should have Super User or General User privileges.
4. Choose SAVE and press <Enter> to let the user addition
take effect.
5. Choose EXIT to leave the Create New User menu.
Delete a User
To delete a user, follow these steps:
1. Choose User Account Change from the main menu.
2. Choose Change Access/Delete Users from the User Ac-
count Change menu.
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Dual-Speed Stackable Hubs User’s Guide
3. Toggle the Status field of the user you wish to remove to
N/A. (To temporarily restrict a user’s access to the hub console, you can toggle that user’s Status to Inactive.)
4. Choose SAVE and press <Enter> to let the user deletion
take effect.
5. Choose EXIT to leave the Delete Users menu.
Primary/Backup Master
The Primary/Backup Master Hub screen, accessible from the Network Monitoring menu, is used to display the stack manage­ment status of each master hub in the stack. Fields in this screen are for information only and cannot be changed. The group ID, primary/backup status, IP address, and MAC address for master hubs in the stack are displayed.
Master Hub Setup and Management 58
Hub Stack Management
Several important hub parameters useful in the day-to-day man­agement of the hub can be viewed and controlled using the Group Configuration and Port State menus.
Controlling Hubs in the Hub Stack
The Group Configuration Menu screen, found under the Network Monitoring menu, displays information about each of the hubs in the stack.
Note: In this context, “Group” means “Hub.”
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Dual-Speed Stackable Hubs User’s Guide
The items displayed on this screen are: ? Group ID . This field indicates which hub is being dis-
played.
? Group Serial Number. Displays the hub’s factory
assigned serial number.
? Group Position Number. Displays the hub’s stack
position relative to the other hubs (1 is the highest in the stack, 5 the lowest).
? Group Description. This field gives a description of the
given hub, showing its model number .
? Group Role. Shows what role the hub is currently play-
ing in the hub stack (primary master , standby master, or slave).
? Group Port Capacity. This field shows the total num
ber of network ports on the hub.
Note: When modules with additional ports are
installed in TE100-DM/DS series hubs, the Port Capacity number will automatically adjust to reflect the added ports. The management software does not discriminate, any type of added or removed port will change the Port Capacity number.
? Group Hardware Revision. This field shows the de-
signed version of the hub hardware.
? Group Master Revision. Displays the designed version
for master hubs.
Master Hub Setup and Management 60
? Group Status. This field shows whether the hub is up-
and-running or down.
? Group Last Oper Change. This field shows the time
when the hub was last added to or removed from the stack. The format is hh:mm:ss.xx, with hh representing hours since the master hub was turned on, mm the minutes, ss the seconds, and xx representing 100ths of a second.
? Group Slot (1). Shows the status of module slot 1. If
there is a module installed in slot 1, this field will display: MII, TP, FX, or Switch as determined by the type of module installed. If there is no module installed, the field will dis­play ”None.”
? Group Slot (2). Shows the status of module slot 2. If
there is a module installed in slot 2, this field will display: MII, TP, FX, or Switch as determined by the type of module installed. If there is no module installed, the field will dis­play “None.”
? Group Isolate. Provides control of the hub’s current
network connection status and allows the system manager to manually isolate a particular hub as needed and recon­nect it later. Toggling the field to ”Isolate” separates the hub’s data connection from the other hubs. Toggling the field to ”Reconnect” re-establishes the connection. See ”Segmenting Hubs” earlier in this chapter for more infor­mation.
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Dual-Speed Stackable Hubs User’s Guide
You can use PREV GROUP and NEXT GROUP to display in­formation about another hub, or you can enter the hub’s? Group
ID number directly in the Group ID field.
Controlling Individual Ports
The Port State Menu, accessible from the Network Monitoring menu, allows you to view the status of individual ports and con­trol their settings. The information displayed includes:
? Group ID. This field determines which hub’s ports are
displayed.
? Port ID . This field determines which port is displayed. ? Connector Type. This field shows the port connector
type.
Master Hub Setup and Management 62
? Link Test. This field displays “Up” if there is a station
connected to the port; otherwise, it displays “Down”.
? Link Test State. This field displays “Enable” if the port
link status is to be auto-detected and displayed, otherwise it displays “Disable”. This variable is user configurable.
? Receive Polarity. This field always displays “Normal” if
the hub is operating properly.
? Auto Partition. This field displays “Yes” if the port has
been automatically partitioned off from the rest of the net­work due to excessive errors on the segment. The field displays “No” for normal oper ation.
? Admin State. This toggle determines whether the port
should be enabled or disabled (manually partitioned). Set­ting the Admin State to “Disabled” will isolate the port from the rest of the network. This variable is user configurable.
? Port Speed. This field displays the port current operating
speed (100M or 10M) relative to the speed of the device con­nected to it.
? Speed Capability. This field displays the port current
speed setting, “Auto” for auto-detect/correct, “100M” for 100Mbps connections only, or “10M” for 10Mbps connections only. This variable is user configurable.
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64
You can use PREV GROUP and NEXT GROUP to switch to another hub, or PREV PORT and NEXT PORT to switch to an- other port. You can also enter the port Group ID a Port ID numbers to go directly to a different port.
Monitoring the Hub Stack
The hub supports several monitoring functions, allowing you to keep statistics on the operation of each port, each hub, and the entire network segment, as well as to monitor the addresses of the packets received at each port.
Displaying Port and Group Statistics
The hub stack collects network transmission statistics for each port, and each hub (group) in the stack. Statistics collected for segments are tabulated differently and are explained in the next section. You can choose which to view from the Statistics menu, accessible under the Network Monitoring menu.
Master Hub Setup and Management
The data categories provided for both port and group statistics are the same. They are:
? Frames Too Long. This statistic counts frames longer
than the 1518-byte (octet) limit set by the Ethernet stan­dard. This problem is likely caused by software errors.
? Very Long Events. This statistic counts events where a
signal is received that is longer than the jabber lockup pr o­tection timer setting. A high count in this field may indicate noise on the line or a bad Ethernet interface.
? Short Events. This statistic counts events where less
than 10 bytes are received and the frame start delimiter is invalid, or where the start frame delimiter is valid but less than 2 bytes are received. This type of error may indicate noise on the line.
? Late Events. This statistic counts collisions that occurred
at or after the 64th byte (octet) in the frame. A high count here may indicate that delays on your Ethernet are too long, and you have either exceeded the repeater count or ca­ble length specified in the Fast Ethernet standard.
? Runt Frames . This statistic counts frames shorter than
the 64-byte (octet) minimum defined by the Fast Ethernet standard. Runts are often caused by collisions.
? Collisions. This statistic counts collisions on the Ethernet
segment.
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Dual-Speed Stackable Hubs User’s Guide
? FCS Er rors. This statistic counts otherwise valid frames
that fail the CRC check.
? Alignment Errors. This statistic counts otherwise valid
frames that did not end on a byte (octet) boundary.
? Readable Frames . This statistic counts valid frames. ? Multicast. This statistic counts the number of good mul-
ticast packets received. Multicast events are messages sent from one node to multiple nodes on the segment.
? Broadcast. This statistic counts the number of good
broadcast packets received. Broadcast events are messages sent to all nodes on the segment.
? Auto Partitions. This statistic counts events where the
port was partitioned off from the rest of the network due to excessive collisions or cabling problems.
? DRM (Data Rate Mismatch). This statistic counts
events where there is a frequency mismatch between the received signal and the hub’s internal clock. A high count in this field may indicate a hardware problem in the hub or in an Ethernet interface.
? SA Changes. This statistic counts the number of times
the source address has changed.
? Isolates (only for 100Mbps connections). Counts the
number of times a port auto isolates.
? Symbol Error (only for 100Mbps connections). Counts
the number of times a received packet contained symbol er­rors. Only one symbol error is counted per packet regardless of the number of symbol errors within the packet.
Master Hub Setup and Management 66
? Total Errors. This statistic is the sum of the FCS Error,
Alignment Error, Too Long Frame, Short Event, Late Event, Very Long Event, and Data Rate Mismatch count­ers.
? Readable Octs. This statistic counts the total number of
bytes (octets) included in valid (readable) frames.
You can use PREV GROUP, NEXT GROUP, PREV PORT, and NEXT PORT to switch hubs or ports. CLEAR COUNTER resets all counters back to zero.
NOTE: The CLEAR COUNTER action only re-
sets the counters for the statistics display; the underlying counters (i.e., MIB variables) are not cleared.
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Dual-Speed Stackable Hubs User’s Guide
Displaying Segment Statistics
The hub stack collects network transmission statistics for each segment in the stack. You can choose to view them from the Sta­tistics menu, accessible under the Network Monitoring menu.
? StatsPkts. This statistic displays the number of packets received from the network, including error packets.
? BroadcastPkts. This statistics counts the number of
good broadcast packets received on the segment.
? MulticastPkts. This statistics counts the number of good
multicast packets received on the segment.
? CRCAlignErrors. This statistic counts the number of
valid length packets (64 to 1518 bytes) that had a bad Frame Check Sequence (FCS).
? UndersizePkts. This statistic counts the number of well-
formed packets that were smaller than 64 octets.
? OversizePkts. This statistic counts the number of well-
formed packets that were longer than 1518 octets.
? Fragments. This statistic counts the number of ill-
formed packets less than 64 octets and all events without a start-of-frame delimiter regardless of their length.
? Jabbers. This statistic counts the number of jabber
events on the segment.
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? Collisions. This statistic counts the number of collisions on the segment.
? 64 Octs. This statistic displays the number of packets
(both good and bad) that were 64 octets long.
? 65-127 Octs. This statistic displays the number of packets
(both good and bad) that were 65 - 127 octets long.
? 128-255 Octs. This statistic displays the number of pack-
ets (both good and bad) that were 128 - 255 octets long.
? 256-511 Octs. This statistic displays the number of pack-
ets (both good and bad) that were 256 - 511 octets long.
? 512-1023 Octs. This statistic displays the number of
packets (both good and bad) that were 512 - 1023 octets long.
? 1024-1518 Octs. This statistic displays the number of
packets (both good and bad) that were 1024 - 1518 octets long.
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Dual-Speed Stackable Hubs User’s Guide
? StatsOctets. This statistic displays the number of data
octets including those in bad packets and octets in FCS fields but does not include preamble or other framing bits.
? Total Octs. This statistic displays the total number of
octets contained in valid frames received on this segment.
Node Tracking
The Node Tracking screen displays the origination MAC ad­dresses of packets received by each node connected to the hub for the last 12 receives.
Master Hub Setup and Management 70
Group and port can be selected by entering the appropriate num­ber(s) in the Group ID and Port ID fields or using the navigation commands at the bottom of the screen.
Per-Port Intrusion Security
Each port on this hub can have intrusion security enabled. In­trusion security preven ts unauthorized individuals from accessing the network. Through the network management software, Ethernet addresses that represent authorized users can be as­signed to each hub port. If a port receives a packet using a source address other than those used by authorized users, the port is dis­abled and the network manager is notified.
Bridge Information
The bridge information screen allows the network administrator to view the install and operation status of all bridging modules within a segment. To avoid non -terminating network data loops,
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Dual-Speed Stackable Hubs User’s Guide
only one bridging module at a time can be active. The hub stack management software always enables the module installed in the highest hub in the stack. The management program can only test for the presence or absence of an installed bridge and not whether it is functional. Under the Bridge Present column, “N/A” indicates no bridging module pr esent in that hub.
Resetting the Hub
You can use the console program to reset the hub stack, either doing a system reset (which restarts the hubs and is identical to powering them off and back on again) or a factory reset (which resets the master hub, reverts all of its parameters back to their factory default values, and restarts the entire hub stack).
Important Note: If it is necessary for you to
power-off the hub (or hub stack)
Master Hub Setup and Management 72
and then restart it instead of us­ing the reset functions, the hub MUST BE POWERED-OFF for a MINIMUM of TEN SECONDS.
If the hub stack has a backup master, the time required to com­plete the reset process will be longer than without one. Generally, a stack reset should be complete within about two minutes.
System Reset
To perform a system reset, follow these steps:
1. Choose System Reset from the main menu. The following
confirmation message will appear:
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Dual-Speed Stackable Hubs User’s Guide
74
2. Move the cursor to Yes to confirm the reset and press <En-
ter>. After a few seconds delay, the hub should restart.
Factory Reset
Before performing a factory reset, be absolutely certain that this is what you want to do. Once the reset is done, all of the master hub’s stored settings (including TCP/IP parameters, SNMP pa­rameters, the enabled/disabled settings of ports, etc.) will be erased and restored to their factory default settings.
1. Choose Factory Reset NVRAM to Default Value from
the main menu. A confirmation message similar to that for the System Reset will appear.
2. Move the cursor to Yes to confirm the reset and press <En-
ter>. After a few sec onds delay, the hub should restart,
and all of its parameters will revert to their default values.
Note: Doing a factory reset to the Primary Mas-
ter also resets the Backup Master variables except for the Backup Master IP address.
Master Hub Setup and Management
A
6 C ABLES AND
C ONNECTORS
100BASE-TX Ethernet Cable and Connectors
? Cable characteristics: 0.4 to 0.6 mm (22 to 26 AWG) 4- pair
(only two pairs/four wires are used for 100BASE-TX); Category 5 unshielded twisted-pair or EIA/TIA-568 compliant, 100-ohm shielded twisted-pair
? Maximum segment length: 100 meters ? Maximum network diameter: 205 meters ? Connectors: RJ-45
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Dual-Speed Stackable Hubs User’s Guide
Straight Twisted -Pair Cable Pinouts
Contact MDI-X Signal MDI Signal
1 RD+ (receive) TD+ (transmit) 2 RD- (receive) TD- (transmit) 3 TD+ (transmit) RD+ (receive) 4 Not used Not used 5 Not used Not used 6 TD- (transmit) RD- (receive) 7 Not used Not used 8 Not used Not used
Crossover Cables
When cascading or connecting the hub to another switch, bridge, or hub through the UTP port, a modified crossover cable is necessary. With a crossover cable, two pairs of wires are switched at one con­nector end. Carry out the following steps to create a customized, crossover twisted-pair cable:
1. Leave one end of the cable as is, with the RJ-45 connector in-
tact. The wiring at just one end of the cable needs to be modified.
Cables and Connectors 76
2. At the other end of the cable, connect wires 1 and 2 to contacts
3 and 6 respectively. Likewise, connect wires 3 and 6 to con­tacts 1 and 2. Refer to the following diagram:
Diagnostic Port Specifications
This section provides supplemental information that concerns diag­nostic port connections. Information on RS-232 DB-25 connectors is provided for connections with 25-pin console devices.
RS-232 (DB9) Pin Specification
The RS-232 serial port of the hub uses a 9-pin female connector. The port can be connected to a VT -100 terminal, a PC, or a workstation emulating a VT -100 terminal. The figures below show the connec­tions necessary for connection to 9-pin and 25-pin RS-232 devices.
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Dual-Speed Stackable Hubs User’s Guide
Terminal/PCSerialPort
ConsolePort
Terminal/PCSerialPort
ConsolePort
(DCE, DB-9)
DCD (1)
RXD (2) DTR (4) DSR (6)
RTS (7) CTS (8)
(DCE, DB-9)
DCD (1)
RXD (2)
TxD (3)
DTR (4) DSR (6)
RTS (7) CTS (8)
TxD (3)
SG (5)
- (9)
SG (5)
- (9)
(DTE, DB-9)
DCD (1) RXD (2) TxD (3) DTR (4) SG (5) DSR (6) RTS (7) CTS (8)
- (9)
(DTE, DB-25)
DCD (8) RXD (3) TxD (2) DTR (20) SG (7) DSR (6) RTS (4) CTS (5)
Cables and Connectors 78
B
A BOOT CONFIGURATION
F ILE
TE100-DM/DS series master hubs support a powerful configuration file which allows many of the hub stack? configuration parameters
to be stored on a centralized server. When the master hub starts up, it can be configured to read its configuration file from the server us­ing the TFTP protocol. This can make it easier to manage a large number of hub stacks, since all of the configuration parameters for all of the hubs can be managed in a single place.
The configuration file is a text file, usually stored on the server with a .CFG extension. It can be up to 10 KB long. Lines beginning with # are considered comments which are ignored by the hub. All other lines are commands, which are interpreted by the master hub.
The configuration file commands accepted by the hub are: ? sysname string Takes string as the System Name, corresponding to the SNMP
MIB-II object sysName. This field is used to assign a name to the hub for administrative purposes. The hub’s? fully qualified do-
main name is often used, provided a name has been assigned. The string can be up to 64 characters long.
? syscontact string
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Dual-Speed Stackable Hubs User’s Guide
Takes string as the System Contact, corresponding to the
SNMP MIB-II object sysContact. This field is used to give the name and contact information of the person responsible for the hub. The string can be up to 64 characters long.
? syslocation string Takes string as the System Location, corresponding to the
SNMP MIB-II object sysLocation. This field is used to indicate the physical location of the hub for administrative purposes. The string can be up to 64 characters long.
? baud-rate n Sets the serial port communication rate used when the port is
being used in out-of-band mode. Legal values for the param eter n are: 2400, 4800, 9600, and 19200.
? SNMP-image string Takes string (which may be up to 64 characters long) as the
filename of the image file to be downloaded from the TFTP server. When the hub boots, it will load the given image file from the server and execute it. This command may be used to update the hub’s software when a new version is available from the manu­facturer.
? ip-netmask mask Uses mask as the network mask for the local network. For a
Class C network with no subnetting, the netmask should be
255.255.255.0.
? ip-default address
Boot Configuration File 80
Uses address as the hub’s default gateway address. The ad-
dress should be in the form xxx.xxx.xxx.xxx, where each xxx is
a number between 0 and 255.
? auth-trap enable/disable Enables or disables authentication failure traps for invalid SNMP
community names. The argument for this field is either enable or disable.
? clear-SNMP-comm-table Clears the hub’s SNMP community name table.
? SNMP-community community permissions Adds a community to the hub’s list of SNMP communities, with
access permissions. Four entries are the maximum allowed. The community name can be up to 32 characters long. Permissions can be read for read-only community access, or write or read-write community access.
? clear-ip-trap-manager-table Deletes all entries from the hub’s trap manager list.
? ip-trap-manager address community Adds the host at address to the hub’s SNMP trap manager list.
Four entries are the maximum allowed. Traps sent to the host will use the community name variable community, which may be up to 32 characters long.
? telnet-idle-time n
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Dual-Speed Stackable Hubs User’s Guide
Sets the hub’s maximum allowed console interface idle time to
n minutes.
? node-age-time n Sets the hub’s node age timer to n seconds. Node aging is used
with the hub’s security option to determine how long to keep en­tries in the node tracking table.
Boot Configuration File 82
C
7 S PECIFICATIONS
General
Standards: IEEE 802.3 10BASE-T Ethernet repeater, IEEE 802.3u 100BASE-TX Fast Ethernet repeater (Class II); ANSI X3T9.5 Twisted-Pair Transceiver
Topology: Star Protocol: CSMA/CD Network Data Transfer Rate: Fast Ethernet, 100Mbps;
Ethernet, 10Mbps Number of Ports: 16 ( TE100-DM16 / TE100-DM16X / TE100-
DS16 / TE100-DS16X) or 24 (TE100-DM24 / TE100-DM24X / TE100­DS24 / TE100-DS24X ) 10BASE-T / 100BASE-TX ports
Network Media: Ethernet: Category 3 or better UTP cable, 100m maximum; Fast Ethernet: UTP/STP Cat 5, 100-ohm twisted-pair (100m maximum) for hub-to-station links; UTP Cat 5, 100-ohm UTP/STP (5m maximum) for hub-to-hub linking
Specifications 83
Dual-Speed Stackable Hubs User’s Guide
84
Hub-to-Hub Cascading
Number of Daisy-Chained Hubs: Maximum of 5 hubs per stack Daisy-Chain Port: Mini SCSI-type connector ? 2 Daisy-Chain Cable: SCSI-type cable (supplied)
LED Indicators
Hub Status: Power, 10Mbps collision, 100Mbps collision, 10Mbps utilization, 100Mbps utilization, module link
Port Status (per port): Link/Activity, Auto Partition/Manual Par- tition, Speed (10/100Mbps)
Environmental and Physical
Power Supply: 100 to 240 VAC, 50 or 60 Hz internal universal power supply
Power Consumption: TE100-DS16 = 25.5 watts maximum TE100-DS16X = 27 watts maximum TE100-DS24 = 34 watts maximum TE100-DS24X = 35 watts maximum
Specifications
TE100-DM16 = 31 watts maximum TE100-DM16X =32.5 watts maximum TE100-DM24 = 39 watts maximum TE100-DM24X = 40 watts maximum Dimensions: 441mm ? 237mm ? 55mm (1.25 U height), 19-inch
rack-mountable
Weight: 3.87kg (8.53 lbs.) Operating Temperature: -10 to 55?C Storage Temperature: –25 to 55?C Humidity: 5% to 95% non -condensing DC Fan: 40mm ? 40mm Emissions: FCC Class A, CE, VCCI Class A, C-Tick Safety: UL, CSA, CE Mark, TUV/GS
Specifications 85
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