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Dual-Speed Stackable Hubs User’s Guide

vii

3

U

NDERSTANDING

I

NDICATORS

......................................... 15

Hub State Indicators............................................................................16

Module Indicators (SLOT) ...................................................................17

Port State Indicators............................................................................17

Port Speed Indicators ..........................................................................18

4

M

AKING

C

ONNECTIONS

................................................... 19

Hub Cascading/Building a Stack .........................................................19

Connectivity Rules...............................................................................20

Hub to End-Station Connection ...........................................................21

Hub-to-Hub Uplink..............................................................................23

Optional Module Connections .............................................................24

Module Installation ..................................................................................... 24
Switching Module (DFE-260S) ................................................................... 25
Fiber Optic Module (DFE-260FX)............................................................... 26
Fast Ethernet Module (DFE-260TX)............................................................ 27

5

C

ABLES AND

C

ONNECTORS

............................................ 29

100BASE-TX Ethernet Cable and Connectors......................................29

Crossover Cables.................................................................................30

6

S

PECIFICATIONS

............................................................. 33

General ...............................................................................................33

Hub-to-Hub Cascading........................................................................34

LED Indicators....................................................................................34

Environmental and Physical ................................................................34

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Summary of Contents for DFE-916

Page 1: ...DFE 916x DFE 916 Ethernet Fast Ethernet Dual Speed Stackable Hubs User s Guide Rev 02 January 1998 6DFE916 02 Printed In Taiwan RECYCLABLE ...

Page 2: ...ich am Geräten befinden sind zu beachten 12 Wird das Gerät über einen längeren Zeitraum nicht benutzt sollten Sie es vom Stromnetz trennen Somit wird im Falle einer Überspannung eine Beschädigung vermieden 13 Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät gelangen Dies könnte einen Brand bzw Elektrischen Schlag auslösen 14 Öffnen Sie niemals das Gerät Das Ge...

Page 3: ... any warranty All products with lifetime warranty have a standard five year warranty To qualify for lifetime warranty the enclosed Product Registration Card must be completed and returned to D Link within ninety 90 days of purchase Warranty service may be obtained by contacting a D Link office within the applicable warranty period for a Return Material Authorization RMA number If a Registration Ca...

Page 4: ...T IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY THE CUSTOMER S OR ANY THIRD PERSON S MISUSE NEGLECT IMPROPER INSTALLATION OR TESTING UNAUTHORIZED ATTEMPTS TO REPAIR OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE OR BY ACCIDENT FIRE LIGHTNING OR OTHER HAZARD LIMITATION OF LIABILITY IN NO EVENT WILL D LINK BE LIABLE FOR ANY DAMAGES INCLUDING LOSS OF DATA LOSS OF PROFITS COST OF COVER OR OT...

Page 5: ...th the regulations for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful inter ference 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 ...

Page 6: ...peed Ethernet Hub Technology Overview 3 100BASE TX Technology Overview 5 100Mbps Fast Ethernet Introduction 5 Cables and Connectors 6 Topology 6 Network Diameter 7 Hub Types 7 2 UNPACKING AND SETUP 9 Unpacking 9 Identifying External Components 10 Front Panel 10 Rear Panel 11 Installing the Hub 12 Installation 12 Rack Mounting 13 Connecting the Power Supply 14 ...

Page 7: ...ack 19 Connectivity Rules 20 Hub to End Station Connection 21 Hub to Hub Uplink 23 Optional Module Connections 24 Module Installation 24 Switching Module DFE 260S 25 Fiber Optic Module DFE 260FX 26 Fast Ethernet Module DFE 260TX 27 5 CABLES AND CONNECTORS 29 100BASE TX Ethernet Cable and Connectors 29 Crossover Cables 30 6 SPECIFICATIONS 33 General 33 Hub to Hub Cascading 34 LED Indicators 34 Envi...

Page 8: ... series Most of the information in this manual applies to all DFE 916 and DFE 916x units Where a description applies to one model only the specific model number will be given Overview of the User s Guide Chapter 1 Introduction Provides information on Fast Ethernet net works and introduces the features of the DFE 916 series hubs Chapter 2 Unpacking and Setup Helps you get started in setting up the ...

Page 9: ...ons Provides information on connect ing to the hub s twisted pair and console ports stacking hubs and linking with other hubs Appendix A Cables and Connectors Provides specifications on the cables and connectors used with the hubs Appendix B Specifications Lists the hubs specifications ...

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Page 11: ...bits per second and IEEE 802 3u 100BASE TX connections twisted pair 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 DFE 916 series hub stack without any rewiring required when a host is...

Page 12: ...features and specifications of DFE 916 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 ca bles Fast Ethernet connections support both shielded twisted pair and Category 5 unshielded twisted pair cab...

Page 13: ...lision detection and handling Preamble regeneration signal retiming Two proprietary daisy chain ports for cascading up to five hubs to form one logical hub management capability is provided via a master hub Uplink port allows easy linking of two hub stacks to further expand your network Optional brackets for mounting in standard 19 inch equipment rack Internal universal power supply and automatic ...

Page 14: ...ating at 10Mbps Similarly the 100Mbps repeater retransmits Fast Ethernet transmissions from ports operating at 100Mbps to all other ports operating at the same speed 10Mbps Repeater 100Mbps Repeater NWay Detection RJ 45 Ports 100Mbps Ethernet Station 100Mbps Ethernet Station 10Mbps Ethernet Station 10Mbps Ethernet Station 100Mbps Ethernet Station If there is a DFE 260S module or a DFE 916x hub pre...

Page 15: ...y ad vanced 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 technology stands out as the most inexpensive and smoothest migration path for existing 10...

Page 16: ...p forms a separate LAN also known as a collision domain and these workgroups can be eas ily 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...

Page 17: ...ts 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 a collision domain thus this type of hub can not be directly interlinked A...

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Page 19: ...rton 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 con nections One daisy chain cable Four rubber feet to be used for cushioning This User s Guide Inspect the hub and all accompanying items If any item is damaged or missing report the problem immediately to your D ...

Page 20: ... next chapter Understanding Indicators for detailed infor mation 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 ports which means you can use ordinary straight through twisted pair cables to connect the hub to PCs workstations or servers through these ports If you need to connect another device with MDI X ports su...

Page 21: ...re really the same port except that their pinouts are different Do not use both Port 1 and the Uplink port at the same time Rear Panel Module Slots Used to install module options for various kinds of additional connec tions as well as the DFE 260S 10Mbps 100Mbps bridge module In the DFE 916x the module slot is already occupied by the switching module which is standard on these models Daisy Chain I...

Page 22: ...enclosed daisy chain cable Fan Provides air circulation and heat dissipation 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 Appendix B Specifications for the acceptable temperature and humidity op...

Page 23: ...ubber feet cushion the hub and protect the hub case from scratches 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 For information about D Link s DFE 700B Rack Mounting Brackets consult your D Link dealer If you already possess the brackets attach the mounting brackets at the hub s front panel one on each side an...

Page 24: ...nd Setup 14 Connecting the Power Supply Power is supplied to the stackable Fast Ethernet hub through an AC power cord The AC power input voltage ranges from 100 to 240 VAC A power cord is included with the device ...

Page 25: ...erstanding Indicators 15 3 3 UNDERSTANDING 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 indica tors of your dual speed hub depicted below ...

Page 26: ...nk amber Segment Utilization 10M Utilization and 100M Utilization The utilization bar graphs provide a quick reference on the current traf fic load relative to the total available 10Mbps or 100Mbps network bandwidth The graphs display a measure of the percentage of band width in use on the respective network segment All data packets are counted whether valid or not HUB ID Indicator The HUB ID read...

Page 27: ...2624ix master hub Port State Indicators There is one port state indicator for each of the twisted pair ports on the hub Each port s LED status indicator reports the port s 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 ...

Page 28: ...received through the port the port is automatically reconnected Disabled steady amber The indicator of a port is amber when the port has been manually dis abled No packet transmission or reception can occur on the port Ports can be manually disabled and enabled from the management station if a stack is being managed via a DFE 2616i DFE 2616ix or DFE 2624i DFE 2624ix master hub Port Speed Indicator...

Page 29: ...ding a Stack You can stack up to five hubs using the daisy chain ports to form one logi cal hub In this configuration the interconnected hubs constitute a single logical unit providing a maximum of 80 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 Repe...

Page 30: ...onnectivity rules The maximum length of a twisted pair cable segment is 100 meters Cabling should be Category 3 or better 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 seg ments and four repeaters then at least two of the cab...

Page 31: ...n a collision domain there may be up to three cable segments and two Class II hubs or hub stacks Hub to End Station Connection After installing the hub properly it can support up to sixteen DFE 916x DFE 916 end station connections Fast Ethernet connections require either a Category 5 UTP cable or an STP cable These cables can be up to 100 meters long Each Ethernet connection requires a Category 3 ...

Page 32: ...en 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 typical connections between the hub and end stations ...

Page 33: ...acks 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 connec tion can be up to 100 meters long as long as the 205 meter total network ...

Page 34: ...nections There are three optional modules that may be added to any of the DFE 916 series hubs Each hub can accommodate one module Each of the modules offers a different additional network interface that allows for greater flexi bility 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 various settings and indicators ...

Page 35: ...ernal connector 4 Using a screwdriver replace the two screws and tighten until snug We recommend that you retain the dust cover in case you need to remove the module for an extended period sometime in the future Switching Module DFE 260S The DFE 260S switching module is used to allow interconnection between the 10Mbps and 100Mbps segments in the hub or hub stack Each hub stack should have one DFE ...

Page 36: ...width The fiber optic module includes the following LED indicators Power Tx This LED is lit when the hub is on and blinks when pack ets are being transmitted by the module Link Rx This LED is lit when the fiber optic ports are properly con nected to a powered on device and blinks when packets are being received by the module Collision This LED blinks when there are packet collisions on the fiber o...

Page 37: ...ast Ethernet two repeater limitation and effectively doubles overall bandwidth The recommended use for this module is to connect to another module of this kind in a second stack The Fast Ethernet module uses a MDI X connector not a straight MDI II therefore a crossover cable must be used when connecting the module to another module and under most other circumstances See Appendix A for pinout infor...

Page 38: ...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 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 ...

Page 39: ...rs Cable characteristics Category 5 unshielded twisted pair or EIA TIA 568 compliant 100 ohm shielded twisted pair data cable with 0 4 to 0 6 mm 22 to 26 AWG wires in two or four twisted pairs only two pairs four wires are used for 100BASE TX Maximum segment length 100 meters Maximum network diameter 205 meters Connectors RJ 45 ...

Page 40: ... Not used Not used 8 Not used Not used Crossover Cables When cascading or connecting the hub to another hub or to a switch or bridge through a 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 ...

Page 41: ...kable Hubs User s Guide Cables and Connectors 31 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 ...

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Page 43: ... X3T9 5 Twisted Pair Transceiver Topology Star Protocol CSMA CD Network Data Transfer Rate Fast Ethernet 100Mbps Ethernet 10Mbps Number of Ports 16 all dual speed 10Mbps 100Mbps Network Media Ethernet Category 3 or better UTP cable 100m maxi mum Fast Ethernet Cat 5 UTP STP 100 ohm twisted pair 100m maximum for hub to station links Cat 5 UTP 100 ohm UTP STP 5m maximum for hub to hub linking ...

Page 44: ...ps collision 10Mbps utili zation 100Mbps utilization module link Port Status per port Link Activity Auto Partition Manual Disable Speed 10 100Mbps Environmental and Physical Power Supply 100 to 240 VAC 50 or 60 Hz internal universal power supply Power Consumption DFE 916x 28 watts maximum DFE 916 28 watts maximum Dimensions 324mm W 55mm H 231 mm D 12 75 216 9 09 inches Weight 2 5 kg 5 5 lb 1 25U h...

Page 45: ...eed Stackable Hubs User s Guide Specifications 35 Storage Temperature 25 to 55 C Humidity 5 to 95 non condensing DC Fan 40mm 40mm 10mm Emissions FCC Class A CE VCCI Class A C Tick Safety UL CSA CE Mark TÜV GS ...

Page 46: ...DENMARK Naverland 2 DK 2600 Glostrup Copenhagen Denmark TEL 45 43 969040 FAX 45 43 424347 SINGAPORE D LINK SINGAPORE PTE LTD 77 Science Park Drive 03 03 CINTECH III Singapore Science Park Singapore 118256 EL 65 7746233 FAX 65 7746322 AUSTRALIA D LINK AUSTRALIA PTY LTD Unit 16 390 Eastern Valley Way Roseville NSW 2069 Australia TEL 61 2 94177100 FAX 61 2 94171077 CHINA D LINK BEIJING 15th Floor Sci...

Page 47: ...your product 1 Where and how will the product primarily be used Home Office Travel Company Business Home Business Personal Use 2 How many employees work at installation site 1 employee 2 9 10 49 50 99 100 499 500 999 1000 or more 3 What network protocol s does your organization use XNS IPX TCP IP DECnet Other_____________________________ 4 What network operating system s does your organization use...

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