Manuale d’uso / di manutenzione del prodotto 3CNJ205 del fabbricante 3Com
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NJ205 IntelliJack 3CNJ205 4-port 10/100 Mbps Managed Ethernet Switch http://w ww .3com. com/ http://w ww .3com. com/pr oductr eg Publishe d Ju ly 2003 User gui de versio n 1.
3Com Corporation n 5500 Great Amer ica Pkwy n Santa Clara, California n 95052-8145 n U.S. A. Copyright © 2003 3Com Corporation. All righ ts reserved. No part of this documentation may be reproduced i.
About the NJ205 Int elliJack 1 Package Cont ents 3 NJ205 Description 5 Installing the Intell iJack 7 Setting up the Power Supply 7 Mounting the IntelliJack 8 Connecting Devices to the IntelliJack 10 C.
Contents Specifications 57 Default Settings 61 Optional Components 63 Power Supplies and IP Phone Power Module 63 Mounting Plates and Spacers 64 Power Options 65 Using an Integrated Switch w ith Power.
1 The 3Com NJ205 is part of the IntelliJack family of pr od ucts that provides conne ctivity at the edge of the network infrastructure. The NJ205 IntelliJack is a 4-port, un-managed Fast Ethernet switch that fits into most standard data port openings.
About the NJ205 IntelliJack 2 Y ou can manage the NJ205 IntelliJack us ing the included Central Configuration Manager . Y ou can also use a supported SNMP management console as you would with any managed device on your network, but gr eat er management and control is available thr ough the Configuration Manager software.
Pa ck a g e Co n t e n t s 3 Pa ck a g e C o n t e n t s The NJ 2 0 5 I ntelli Jack is a v ailabl e in si ngle- and 2 0 -pa cks. B ef ore install ation, f amiliarize y ou rself w ith the f ollowing items , w hic h are included w ith the NJ2 0 5 : 1 NJ20 5 Intell iJ a ck.
About the NJ205 IntelliJack 4 Additionally , the following i tems are shipp ed with the single pack: ■ Compact disc containing ■ User Guide and additional informational documents. ■ Configuration Manager softwar e. All scr ews ar e philli ps pan head type scr e ws.
NJ205 Description 5 NJ205 Description The following diagram shows the fr ont, rear and bottom vie ws of the IntelliJack: 1 RJ-45 switched PA N ( p e r s o n a l area ne twork) ports Four 10/100 Mbps auto -negotiation ports, which the NJ205 configures for 10 Mbps or 100 Mbps connections au tomatically (green LEDs).
Abo u t the NJ 205 Int e l l i J ack 6 4 Powe r LE D Indi cates NJ205 p ower status (gr een). For more information, se e “Checking the LEDs” on page 1 1 . 5 Pass-through port 6 Powe r - forwar ding LED Lights when the IntelliJack is c onnected to and forwar di n g power to an IEEE 802.
7 Installing t he NJ205 Inte lliJack consis ts of the follo wing steps: 1 Set up the power supply . 2 Mount the NJ205 to the wall outlet box. 3 Connect devices to the NJ205.
Installing the IntelliJac k 8 Befor e you begin installatio n, determine which typ e of power supply the IntelliJack will use. For mor e information on power o p tio n s and c o nfi g uratio n , see Ap p end i x D, “Power Opt i on s ”.
M o u n t i n g t h e I n t e ll iJ a ck 9 Bef ore con necting the Intelli Jack to the netw or k , verify tha t the exi sting netw ork cabli ng meets the A NSI/ TIA / E IA -5 6 8 standard and that the port in the wiring close t is connected to a n activ e Ethern et M DI -X port.
I n st a l l i n g t h e In t e l l i J a ck 1 0 C o n n e ct i n g D e v i ce s t o t h e I n t e l l i Ja ck O n c e t h e p o w er s o u r c e a nd t he d a t a s o u r c e h a v e b een v e r i f .
Ch e ck i n g t h e L E D s 1 1 C h e ck i n g t h e L E D s You ca n verify t he Intelli J ack install ation by check ing the LEDs. LE D D e s cr i p t i o n (L A N) On —the IntelliJ a ck is co nnected to the netw ork and a link has been established.
Installing the IntelliJack 12.
13 Once you have installed the NJ205 har dware, you need to configure it for use on your particul ar network. T o configure the NJ205, install the Local and Centra l Configuration Managers. NOTE : Y ou will use the Local Configuration Manager for initial co nfiguration of the NJ20 5 on your network.
Installing the Configuration Managers 14 System Requir ements The machine you install the softwar e on should meet the following re quirements: ■ Pentium pr ocessor ■ Minimum of 15MB disk space ■ Windows 2000 or Windows NT 4.
Installing the Local and Cent ral Configuration Managers 15 3 Click Next to continue. 4 Carefully r ead the license agreement. If you agr ee, click “Y es, I accept” and Next to continue.
Installing the Configuration Managers 16 6 The progra m files will be installed in the dir ectory C:Program Fil es3ComIntelliJack. I f you want to change the location of the installati on, click Change. Otherwise click Next to ac cept the default l ocation and continue.
Installing the Local and Cent ral Configuration Managers 17 7 Select a typical or custom setup and click Nex t. The T ypical installation w ill ins t a ll b ot h th e Lo ca l Con fi gu ra t i o n Manager and the Central Configu ration Manager on your system.
Installing the Configuration Managers 18 8 Review the settings you selected and cl ick the Install button..
Installing the Local and Cent ral Configuration Managers 19 9 When the installation h as completed, click the Fi nish button to close the installati on utility . The installation util ity creates two shortcut icons on the Desktop--one for the Local Configurati on Manager and one for the Central Configuration Manager .
Installing the Configuration Managers 20.
21 Initializing the NJ205 IntelliJack Once you have instal led the NJ205 har dware on your network and the Local Configuration Manager softwar e on your computer , you need to perform an initial configuration of the IntelliJack . 1 Connect your computer to the NJ205 that you ar e installing.
Using the Local Configur ation Manager 22 3 The MAC address and default IP addr ess of the currently connected NJ205 will appear in the first field. If you connect to another NJ205, you must click the Query button to refr esh the window. If you ar e not connected to any IntelliJack, the field will display the message Not Co nnected.
Initializing the NJ205 Inte lliJack 23 5 Enter Location Information for the particular NJ205 you ar e configuring. This field can help you and other network managers identify this Intell iJack in the futur e.
Using the Local Configur ation Manager 24 8 If you wish, check the box next to Lock IP Address. Selecting this option will ensu re that the IntelliJack will always use a particular addr ess. 9 Click the Configur e button and the Local Configuration Manager will ask you to enter the password fo r the device.
Settin g Advanced Op tions 25 Setting Advanced Options If you want to change the default passwor d of the NJ205 or manage it from an SNMP console, you can configure these settings fr om eithe r the Local Configuration Manager or the Central Configuration Manager (cover ed in the next chapter).
Using the Local Configur ation Manager 26 2 T o change the IntelliJack’ s configuration pa sswor d, click on the box next to Change NJ Passwor d. The n enter the new passwor d in both passwor d fields. (Y ou must enter the password twice to ensure yo u entered it co rrectly .
27 Y ou should use the Local Configuration Manager to initialize each of the NJ205 IntelliJacks i nstalled on your network. Once you have completed that step, you can manage all of them with the Central Configuration Manager . Install this pr ogram on any computer on your network you want to use as a central management console.
Using the Central Configuration Manager 28 T o discover devices on your network, run the following steps: 1 Open the Central Configuration Manager by double- clicking on th e NJ205 Central Config Mgr desktop icon.
Discovering NJ205 Devices on Y our Network 29 2 Select Discovery fr om the De vices menu. The following window appears: 3 Y ou can discover new devices b ased on a speci fic sub net or on a specific range of IP addr esses. a T o discover devices by subnet, select that option on the screen.
Using the Central Configuration Manager 30 b Fill in the Subnet and Mask fields and cli ck OK. or c T o discover devices within a ce rtain IP range, select that option on the scre en and comp lete the From and T o fields.
Discovering NJ205 Devices on Y our Network 31 The device discovery too l will return the following information from the NJ205 Intell iJacks on your ne twork: ■ IP addr ess ■ MAC address ■ Subnet addr ess ■ Group Name ■ Location information ■ Firmware version Y ou can sort this information in ascending or descending or der .
Using the Central Configuration Manager 32 When Subnet is selected (the default option), y ou wi ll see a list of IP subnets to choose from. Se lecting Network will show all of the discovered devi ces in the database. If you select a particular subnet, only the devices in that subnet will be displa yed.
Viewing Device Proper ties 33 Viewing Device Pr operties Once the database is populated with NJ205 Inte lliJacks on your network, you can begin to m anage th ose devi ces. The m ain window of the Central Configur ation Manager shows a list of devices in the curr en t database with the information retrieved during the discovery pr ocess.
Using the Central Configuration Manager 34 3 With the General tab selected, you can view and edit information about the device such as the IP addr ess, subnet mask, default gateway , and wh ether it uses a stati c IP address or gets its addr ess from a DHCP server .
Viewing Device Proper ties 35 5 In the middle of this wi ndow you’ll see information about each of the four P AN ports on the front of the Intel li Jack.
Using the Central Configuration Manager 36 Several fields in this window can be edited, a few cannot. Y ou can change the values of the fields with dro p-down lists: Priority Schedule Poli cy , LAN Port Egress Mo de, LAN Port Ingr ess Mode , Max Frame Size, Counter Mode, and Power Forwar ding.
Viewing Device Proper ties 37 9 Click on the Statistics tab. NOTE : Y ou can click Apply at any time to save the changes you have made . But be sure to click Apply after you have finished making all your changes.
Using the Central Configuration Manager 38 From this vie w you can see statistics about the number of good or bad packets each port has r eceived and transmitted, based on how you have configur ed the Counter Mode setting. Y ou can reset al l coun ters to zero by clic king Clear .
Changing Device Configuration 39 Y ou can view and edit the SNMP Common Settings and T rap Settings for this particular NJ205. 11 Click Apply to save any changes you make and a configur at ion summa ry dial og box will appear . V erify the information and click OK.
Using the Central Configuration Manager 40 This window has si x tabs across the top--General, Priority , VLAN, Security , SNMP T raps, and Advanced. Check the box next to any setting you want to change from within these six areas. 3 Select the General tab.
Changing Device Configuration 41 7 Change the Port and Li nk states of any of the IntelliJack’ s ports by checking the box next to the characteristic you want to modify an d selecting a valu e from the d rop l ist. 8 By default, the Ce ntral Configuration Manager will displa y a count of good transmissions in the Pr operty wind ow .
Using the Central Configuration Manager 42 10 From th is screen you can chang e the Look Up Sche me and Default Priority Level of ea ch port on the NJ205 and the Priority Sched uling Policy o f the Intell iJack itself. C heck the box next to the setting you want to change and select an option fro m the dr op-down list.
Changing Device Configuration 43 . 13 Select the Security tab to set the security options of the NJ205 IntelliJack. NOTE : VLAN stands for Virtual Local Area Network. VLANS are used to cr eate a subgroup of systems within a LAN in order to isolate traffic between network devices.
Using the Central Configuration Manager 44 14 Y ou can change the device password (the default passwor d is “ password ”), and adjust the SNMP Set permissions and Community Strings. 15 Click the SNMP T raps tab to change the trap settings of the NJ205.
Changing Device Configuration 45 17 Select the Advanced tab for this window: 18 Y ou can change the Max Frame Size and Power Forwar d settings by selecting an option fr om the dr op-down list. 19 From this win dow , you can see another set of tabs, one for each port on the IntelliJack.
Using the Central Configuration Manager 46 20 At the bottom of this window is an option to resto re some of the configuration settings to their default valu es.
Changing Device Configuration 47 The values that rema in unchanged when you click Restor e Factory Default Settings are: ■ Group Name ■ Location ID ■ Passwor d ■ IP Address ■ DHCP Settings .
Using the Central Configuration Manager 48 22 If you click Configuration Summary , you will see a summary of all the changes you ha ve made. Enter your passwor d and click Start. As the IntelliJacks ar e configured, their status wil l be updated in the Status column.
Finding Computers Connected t o NJ205 Devices 49 Finding Computers Connected to NJ205 Devices Occasionally you ma y need to find out whic h IntelliJack a networked device, such as a PC, is connected to. This is one of the many situations wher e the Location Information field of th e NJ205 can be very useful.
Using the Central Configuration Manager 50 When the search is comple te , the Search Resul ts field will display the IP addr ess of the NJ205 that the network device is connected to. It will also show the Location Name assigned to the Intel liJack an d which P AN port the network device is usi ng.
Upgrading the NJ205 Firmware 51 Upgrading the NJ205 Firmware Y ou can upgrade the firmwar e on your NJ205 devices over the network fr om the Central Config uration Manager . T o do so, follow these steps: 1 Select one or more IntelliJacks you want to upgra de.
Using the Central Configuration Manager 52 4 Select a valid firmware image by typing the path to the file or by using the Br owse button. 5 Select the time to perform the upgrade. Y ou can either send the update file immediatel y or select a specific time and date to send the file.
Upgrading the NJ205 Firmware 53 7 Review the list of IntelliJack s you want to upgrade. If you want to modify this list, click Cancel and r estart the firmwar e upgrad e procedur e.
Using the Central Configuration Manager 54 8 T ype your password in the Password fi eld, then click Finish. The Upgrade Pr ogress d ialog box will ap pear .
Upgrading the NJ205 Firmware 55 Viewing Log Files The Central Configuration Manager cr eates a log file with details of the firmware upgrade operati on. This file i s in the Central ConfiguratorLog subdir ectory un der th e directory whe re you installed the IntelliJack co nfiguration softwar e.
Using the Central Configuration Manager 56 Viewing and Cancel ing Scheduled Firmwar e Upgrades Y ou can select a time and date to sen d an upgraded firmwa re image to the IntelliJacks in your network. T o view and make changes to the firmwar e upgrades you have schedule d, fol low these steps: 1 Select Scheduled Upgrade fr om the View menu.
57 Hardware Power consumption <3.5 watts without p ower forwarding Maximum 11 watts with power forwar ding (depending on the device drawing power) Network Interface 10 Mbps Ethernet 10BASE-T Ethernet IE EE 802.3 industry s tandard for a 10 Mbps baseband CSMA/CD local area network 100 Mbps Ethernet 100BASE-TX Ethernet IEE E 802.
Specifica tions 58 Performance Auto-negotiation Communic ation speed (10 Mbps or 100 Mbps) and duplex mode (full or half) can be determined through auto- negotiation with the att ached devices. The IntelliJack attempt s to negotiate the fas test connection possible (100 Mbps full- duplex).
5 9 Fe a t u r e s Power O v er Ethernet C ompatible w ith IEEE 8 0 2 . 3 af Local pow er supply Required fo r netw orks that do no t support Power O v er Ethernet V oice Over IP (V oIP) C o m p a t i b l e w i t h V o I P .
Specifica tions 60.
61 Global S e tting De f ault Value Max Frame Size 1 5 18 or 1522 if tag g ed Counter M o de Count good frames P r i ority Schedul i ng Mo d e 8, 4, 2, 1 weighted VLAN T a g for L A N P o r t (egress).
Default Settings 62 The values that rema in unchanged when you click Restor e Factory Default Settings are: ■ Group Name ■ Location ID ■ Passwor d ■ IP Address ■ DHCP Settings ■ SNMP Commu.
6 3 The Intelli J ack w ork s w ith the f ollowing optional components, a ll of w hich a re a v ailable f rom 3 C om (order o nli ne at w w w. 3 com. com).
Optional Components 64 Mounting Plates and Sp acers 3Com Part Number Description 3CNJMP-EXT 10 mm-thick extensio n ring used to add depth t o wall ou t let open i ngs wh e n i n sta l l i ng an N J105 o r NJ205 IntelliJack.
6 5 The 3C NJ 2 0 5 Intel li J ack is comp liant w ith the f ollowing pow er options : IEEE 8 0 2 . 3 af PSE (Pow er Source E quip ment) 3 C om SuperStack 3 S w it ch 44 0 0 P W R (3 C 1 7.
Power Options 66 Using an Integrated Switch with Power Ov er Etherne t T o use Power Over Ethernet, you must have a switch on the network that has Power Over Ethernet integrated into it. Connect the network data/power cable to the IntelliJack white cable, as shown in the following illustrati on.
Using Ethernet Multi-port Midspan Power Supply 67 Using Ethernet Multi-port Midspan Power Supply T o use an Ether net multi-port midspan power supply , you must connect the power supply to your network, as shown in the i l l u str a t i o n on page 68 .
Power Options 68 NOTE : The black cable ca n also be connected to Ethernet multi-port midspan power supply and will power a PoE compatible device connected to the pass-through port on the IntelliJack , bu t it will not provide power to th e In te ll iJ ack .
Using a Single-port Ethernet Power Supply 69 Using a Single-port Ethernet Power Supply T o use a single-port Ether net power supply , c onnect the power supply to the network hub or switch and to the IntelliJ ack white cable, as shown in the following illustrati on.
Power Options 70 Using the 3Com Local P ower Supply If your network does not support Power Over Ethe rnet, or if you are not using a single-port or multi-port endspan power supply , you must pur chase a local power supply fr om 3Com. See Appe n dix C "Obta i n i ng O p t i on a l C o mpone n t s " .
Using the 3Com Local Power Supply 71 T o connect the local power supply to the Intell iJack, fol low these steps (as shown in the previous diagram): 1 Route the power ca ble through the strain r elief on the top of the IntelliJack. 2 Plug the power cable into the IntelliJack.
Power Options 72.
73 Make sure the wall or cub icl e opening where the Intelli J ack is being installed comp lies with the B ritish Standar d Institute (BSI): BS 4 664 : 19 7 0 (1986) sta n da r d , as d escri b ed be l o w .
Installation Planning 74 T o ensure proper horizontal cabling functi onality , adhere to the following standar ds during installation : ■ ANSI/TIA/EIA-568 Commercial Building T elecommunications Cab.
75 If you encounte r pr oblems with the NJ205 I ntelliJack: ■ V erify the IntelliJack is r eceiving power by viewing the Power LED (it should be on ).
T roubleshooting 76 T roubleshooting Ma trix Event/ Message Description Solu tion Power LED is not on IntelliJack is not receiving power Ensure power supply is properly connected. For power over Ethe rnet, make sure that the cable is connected to both the LAN port on the back of the IntelliJack and to the workgroup switch.
T roubleshooting Matrix 77 Amber LED on Port 4 is not lit Power is not being forwarded to network device n Make sure the ca ble is properly connected to the network d evice. n Make sure the ca ble is firmly co nne cted to one of the fo ur IntelliJack p orts labeled 1-4 .
T roubleshooting 78 Attributes Error Unexpected configuration parameters Confirm that you have specified valid parameter values and retry the configuration operation.
79 3Com pro vides easy access to technical support information through a variety of services. This section descri bes these services. Information contained in this se ction is corr ect at time of publication. For the most r ecent information, 3Com recommen ds that you access the 3Com Corporation Wo rld W ide Web site : www .
T echnical Support 80 Wor ld W id e We b Si t e T o access the latest networ king information on the 3Com Corpora tion World Wide Web site, enter this URL into your Internet browser: http://www.
Support from Y our Network Suppli er 81 Support fr om Y our Network Supplier If you r e quire additional assistance, consult your netwo rk supplier . Many suppliers are authorized 3Com service partner.
T echnical Support 82 Support fr om 3Com If you are unab le to obtai n assistance from the 3Com online technical r esources or fr om your network supplier , 3Com offers technical telephone support services. T o find out more about your support options, ca ll the 3Com technical telephone support phone number: UK- 0870 909 3266; DE- 01805 404 747.
8 3 T e ch n i ca l Su pp o r t C o u n t r y T e l e p h o n e # A ustria 0 1 7 9 5 6 7 1 2 4 Belgium (Fl emish) 0 7 0 70 0 00 0 Belgium (French) 0 7 0 70 0 77 0 Denmark 7 0 1 07 2 8 9 F inland 0 1 0.
3Com Corporation Limited W arranty This warranty applies to customers located in the United States, Australia, Canada (except Quebec), Ireland, New Zealand, U.K., and other English language countries, and countries for which a translation into the local language is not provided.
Limited Warranty and R egulatory Compl iance Information OBT A INING W ARRANTY SERVICE Customer must contact a 3Com Corporate Service Center or an Authorized 3Com Service Center within the applicable warranty period to obtain warranty service authorization.
Limited Warranty and Regulatory Compl iance Information LIMIT A TION OF LIABILITY TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR ITSELF AND ITS LICENSORS AND SUPPLIERS ANY LIABILITY, WHETHE.
Limited Warranty and R egulatory Compl iance Information FCC Class A V erification Statement WARNING: This equipment has been tested and found to co mply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules, and the Canadian Department of Communications Equipment Standards entitled, “Dig ital Apparatus,” ICES-003.
3 C o m Co r p o r a t i o n P. O . B o x 5 8 1 4 5 5 5 0 0 G r e a t A m e r i ca Pk w y Sa n t a C l a r a , C A 9 50 52 -8 1 4 5 U . S. A . w w w . 3 co m .
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il 3Com 3CNJ205 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del 3Com 3CNJ205 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso 3Com 3CNJ205 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul 3Com 3CNJ205 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il 3Com 3CNJ205, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del 3Com 3CNJ205.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il 3Com 3CNJ205. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo 3Com 3CNJ205 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
