3Com 3CRWEASY96A manual

http://www .3com.com/ http://support.3com.com/registration/fr ontpg.pl/ User Guide Wir eless LAN Outdoor Bridge Solution 3CRWEASY96A Complete Building-to-Building Outdoor Wireless LAN Kit Published February , 2003 Document V ersion 1.2.0[...]

3Com Corporation 5500 Great America Parkway Santa Clara, California 95052-8145 Copyright © 2003 3Com Corporation. All rights reserved. No part of this documentation may be repr oduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission from 3Com Corporation[...]

Contents 1 Introduction Basic Network T opologies 7 Point-to-Point 7 Point-to-Multipoint 8 Basic Operating Modes 9 2 Installing the Outdoor Bridge Installation Requirements 10 Power Requirements 10 Administration Requirements 11 Installation Guidelines 11 Proper Gr ounding 11 Alignment 12 Polarization 12 Restrictions on Antenna Use 12 Safety Inform[...]

Setting up Protocol and Port Filtering 23 Setting Wireless Network Properties 24 Setting Advanced Performance Properties 26 Setting up an Ad Hoc Network 28 Optimizing an Ad Hoc Installation 29 Setting up an Access Point Infrastructure Network 30 Changing Security Settings 31 No Security (Open System) 32 40-bit Shared Key (Wi-Fi) 32 128-bit Shared K[...]

Regulatory Compliance Information Index[...]

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7 1 I NTRODUCTION The 3Com® W ir eless LAN Outdoor Bridge Solution is a comprehensive building-to-building outdoor wireless LAN kit that r educes the need to evaluate, purchase and assemble separate components. One convenient package includes everything you need to offer an easy-to-manage building-to-building wir eless LAN. The package features a [...]

8 association between the wired LANs in two r emote buildings. See the following diagram of the point-to-point topology . P OINT - TO -M ULTIPOINT Point-to-multipoint topology allows communication among three or mor e buildings. In the central building, an access point equipped with an omnidirectional antenna pr ovides wireless association among th[...]

9 B ASIC O PERATING M ODES T wo operating modes relate to the basic WLAN topologies: ■ Ad hoc mode is the basis for point-to-point topology . Operating in ad hoc mode, two outdoor bridges can associate without an access point, allowing the LANs to which they are connected to communicate. ■ Access Point (Infrastructure) mode is the basis for poi[...]

10 2 I NSTALLING THE O UTDOOR B RIDGE This equipment must be installed in compliance with local and national building codes, regulatory r estrictions, and FCC rules. For the safety of people and equipment, only professional network personnel should install the bridge, cables, and antennas. I NSTALLATION R EQUIREMENTS The following items are r equir[...]

11 for the country of use. All refer ences to the power supply in this document refer to equipment that meets these requir ements. Because the power supply plug is the only means of disconnecting the bridge from power , make sur e the power outlet is accessible. See “Using the Power Supply” on page 15 and “Using a Power -Over -Ethernet LAN Po[...]

12 minimize damage from lightning strikes. A lightning arr estor , properly grounded and installed at each building in the topology , will protect networking equipment in the building, as well as the people working there, fr om lightning-induced surges that travel on Ethernet cables. A LIGNMENT Position bridges so that they are aimed at each other [...]

13 S AFETY I NFORMATION WARNING: Do not install the bridge near overhead power lines, electric light or power circuits, or where it can come into contact with such circuits. Provide ten feet or more clearance between the bridge and such power lines or circuits. Do not install the bridge flush with the rooftop or wall. When installing the bridge, d[...]

14 M OUNTING THE B RIDGE TO A M AST The bridge can be placed in any suitable outdoor location (see “Installation Guidelines” on page 11). Refer to the adjustable mount instruction sheet that comes with the bridge mounting hardwar e, and the illustrations below: Make sure that all bridges are pr operly oriented for polarization as described in ?[...]

15 C ONNECTING THE B RIDGE TO THE LAN Y ou can connect to the LAN either through the 3Com power supply or thr ough IEEE 802.3af power -over -Ethernet compliant equipment. U SING THE P OWER S UPPLY The power supply can be located indoors at any point between the bridge and the LAN access port where an accessible power outlet exists. Connect the cabl[...]

16 illustration shows the connection through a 3Com Ethernet Power Supply to a 3Com SuperStack ® Switch. I NSTALLING S OFTWARE U TILITIES The 3Com installation CD includes the W ir eless Infrastructure Device Manager tool, which helps you set up and administer the wireless components of your network. It also contains documentation, including the h[...]

17 E STABLISHING W IRELESS A SSOCIATION After the bridge and software utilities ar e installed, you can configure the bridge as follows: ■ Launch the bridge configuration. (See “Configuring the Building-to-Building Bridge” on page 18 for details on how to launch the configuration and make changes.) ■ For a point-to-point association bet[...]

18 3 C ONFIGURING THE B UILDING - TO -B UILDING B RIDGE If the configuration that was set at the factory does not meet your network requir ements, or if you want to customize the settings, you can configure the bridge through your W eb browser . The 3Com W ir eless Infrastructure Device Manager helps you locate 3Com wireless LAN devices on the ne[...]

19 identified with exclamation points (!). Y ou can refr esh this display by clicking Refresh . Y ou should refr esh the display , for example, after you change a device IP address. 2 In the W ir eless Network T ree, select the device you want to configure. If more than one wir eless LAN device appears in the tree and you ar e not sure that you h[...]

20 U SING THE P RE -IP C ONFIGURATION W IZARD Y ou can only configure devices that ar e on the same subnet as your computer . T o configure a device on a dif ferent subnet, you must first assign it an IP addr ess on the same subnet as your computer . After you launch the configuration, you can change settings as usual. Just before you finish, [...]

21 2 Return to the device manager and repeat step 1 for the second bridge. Make sure that both bridges ar e using the same BSSID. If the bridges are not using the same BSSID, specify the BSSID on both bridges as follows: a In the W ir eless Network page, select the following Network Mode: Ad-hoc (Peer -to-Peer) Specify . b Enter the BSSID in the sp[...]

22 S ETTING IP N ETWORK P ROPERTIES Under System Configuration, click IP Network . The IP Network Properties page appears, where you can change the following settings. When you ar e finished, click Save . ■ IP Network Setting —This setting allows you to change the device IP address. T o let the device get an IP address automatically from a DH[...]

23 T o specify an IP address, click Specify an IP address , enter the IP address parameters in the spaces provided. After you change the IP address and click Save , you cannot continue to configure the device using the old IP addr ess. T o continue configuring this device after making this change, you must do the following: a Close your browser .[...]

24 T o set up protocol port filtering: 1 Under System Configuration, click Protocol Filtering . 2 In the Protocol Filtering page, click the Allow radio button next to the UDP/IP or TCP/IP protocol (or click both buttons). 3 Select the Port Filtering Mode: Allow —If you want to block most protocol ports and allow a small number of others, use th[...]

25 T o maintain wireless association, the WLAN service area on a bridge and the device with which it is associated must match exactly . Therefor e, if the bridge is set to specify the WLAN service area and you change the other device’ s WLAN service area, make sur e to change the bridge WLAN service area also. ■ Access Point Privacy Mode —Thi[...]

26 restrictions. Y indicates the power level that is set automatically; N indicates that a combination is not allowed. S ETTING A DVANCED P ERFORMANCE P ROPERTIES Under System Configuration, click Wireless Network . On the W ireless Network Properties page, click the link to go to advanced wir eless network configuration. The Advanced W ir eless [...]

27 auto-negotiation. T o enable flow control, click On . T o disable flow control, click Off . ■ Acknowledgement Delay —This setting determines the length of time the bridge waits for an acknowledgement after transmitting packets. When the delay time has passed, the bridge resends the packets. A longer acknowledgement delay allows the bridge [...]

28 S ETTING UP AN A D H OC N ETWORK Operating in ad hoc mode, two bridges can establish a point-to-point association without an access point, allowing two LANs to communicate. 1 Install the first bridge. 2 Use the 3Com W ir eless Infrastructure Device Manager to select the first bridge and launch its configuration management system. 3 Configure[...]

29 O PTIMIZING AN A D H OC I NSTALLATION Y ou can optimize an ad hoc installation by adjusting antenna positions slightly to improve the radio signal between bridges. The following tools help you to optimize the installation: ■ The device manager can display a dynamic graphical repr esentation of the bridge’ s received signal strength indicatio[...]

30 b Enter the BSSID in the spaces provided. c Click Save . 5 After you have enabled RSSI broadcasting on both bridges and verified that they are using the same BSSID, r etur n to the device manager , select the first bridge, and click Properties . 6 In the device properties window , click RSSI Monitor . The RSSI Monitor window shows a graphical [...]

31 Shared key —See “40-bit Shar ed Key (W i-Fi)” on page 32 or “128-bit Shared Key” on page 33. Password —If you ar e using a 3Com Access Point 8000, you can set up password security as described in “128-bit Dynamic Security Link” on page 33. 4 Under System Configuration, click Wireless Network . 5 In the W ir eless Network page: a[...]

32 When you are finished, click Save . Then go to the Wireless Network Pr operties page, set the W ir eless LAN Service Area, and click Save . Security settings take effect only after you click Save in the Wireless Network Pr operties page. Although the bridge is allowed to associate with an access point set for a differ ent level of encryption, d[...]

33 keys in the provided spaces, then click a radio button in the Selected Key column to specify which key to use and click Save . 128- BIT S HARED K EY This option can be used with other 3Com 11 Mbps W ir eless LAN devices and with equipment from certain manufactur ers that also support 128-bit shared key encryption. It provides a higher level of s[...]

34 settings that have already been saved. T o reset the bridge, under T ools, click Reset Wireless Building-to-Building Bridge . In the next Web page, click Reset . R ESTORING A B RIDGE TO F ACTORY D EFAULTS Y ou can restor e bridge settings to the defaults that were set at the factory as follows: 1 Under T ools, click Restore Factor y Defaults . 2[...]

35 T o install an upgrade: 1 Use the 3Com W ir eless Infrastructure Device Manager to select the device and launch its configuration. 2 Under T ools, click Upgrade System . 3 Enter the name of the upgrade file that you downloaded earlier . 4 Enter the IP address of the TFTP server wher e the upgrade file is located. 5 Click Upgrade . The upgrade[...]

36 R ESTORING A C ONFIGURATION If you have stored a backup configuration on your computer , you can restore the configuration as follows: 1 Under T ools, click Restore W ireless LAN Building-to-Building Bridge. 2 In the next page, click Browse and select the backup file to upload to the bridge. 3 Click Restore . The configuration is restor ed a[...]

37 R ESETTING S TATISTICS L ISTINGS In the Ethernet Client List page, click Reset Statistics to set the # T ransmitted Packets and # Received Packets listings back to zero. C LEARING THE C LIENT L IST Y ou can clear the client list manually by clicking Reset Clients in the Ether net Client List page. The bridge erases the client list. Thereafter , [...]

38 4 T ROUBLESHOOTING D IAGNOSING P ROBLEMS If you have difficulty with a 3Com Wireless LAN building-to-building bridge, try the solutions in the following table. Symptom Solutions Two bridges fail to communicate in ad hoc mode. ■ Adjust the positions of the antennas to improve reception. ■ To ensure correct operation in ad hoc mode, the setti[...]

39 A bridge set for 128-bit Shared Key encryption seems to communicate with an access point set for 40-bit Shared Key encryption or open system. Although the bridge is allowed to associate with an access point set for a different level of encryption, data authentication is not allowed. Therefore, data cannot pass between the bridge and the access p[...]

40 D ISCONNECTING THE B RIDGE ■ If you are using the 3Com power supply , unplug it from the power source. Then unplug the Ethernet cable from the power supply and the second Ethernet cable from the bridge. ■ If the bridge is connected directly to a power -over -Ether net device, unplug the bridge Ethernet cable from the device. ■ DO NOT A TTE[...]

41 A T ECHNICAL S UPPORT 3Com provides easy access to technical support information through a variety of services. This appendix describes these services. Information contained in this appendix is correct at time of publication. For the most recent information, access the 3Com Corporation W orld W ide W eb site at http://www .3com.com/. O NLINE T E[...]

42 S UPPORT FROM Y OUR N ETWORK S UPPLIER If you requir e additional assistance, contact your network supplier . Many suppliers are authorized 3Com service partners who ar e qualified to provide a variety of services, including network planning, installation, hardwar e maintenance, application training, and support services. When you contact your [...]

43 R ETURNING P RODUCTS FOR R EPAIR Before you send a pr oduct directly to 3Com for r epair, you must first obtain an authorization number . Products sent to 3Com without authorization numbers will be returned to the sender unopened, at the sender’ s expense. T o obtain an authorization number , call or fax: Malaysia 1800 801 777 New Zealand 080[...]

44 Country Contact Information Asia, Pacific Rim + 65 543 6500 Phone + 65 543 6348 Fax Europe, South Africa, and Middle East http://emea.3com.com/gls For e-mail Support: http://emea.3com.com/support/email.html Central and South America http://www.3com.com/support/en_US/repair/lat.html Argentina http://www.3com.com/support/en_US/repair/lat.html Bol[...]

45 Poland 00800 3111206 Portugal 0800 831416 South Africa 0800 995014 Spain 900 983125 Sweden 020 795482 Switzerland 0800 55 3072 U.K. 0800 966197 U.S.A. and Canada 1 800 876 3266 Country Contact Information[...]

R EGULATORY C OMPLIANCE I NFORMATION 3Com Wireless LAN Outdoor Bridge Solution FCC Radio-Frequency Exposur e Notice This device generates and radiates radio-frequency energy. In order to comply with FCC radio-frequency radiation exposure guidelines for an uncontrolled environment, this equipment has to be installed and operated while maintaining a [...]

Industry Canada Notice (Applicable to Use Within Canada) This device complies with Canadian RSS-210. To prevent radio interference to the licensed service, this device is intended to be operated indoors and away from windows to provide maximum shielding. Equipment (or its transmit antenna) that is installed outdoors is subject to licensing. The ins[...]

I NDEX Numbers 128-bit Dynamic Security Link 33 128-bit Shared Key 33 3Com Knowledgebase Web Services 41 3Com Wireless Infrastructure Device Manager 18 40-bit Shared Key (Wi-Fi) security 32 A access point network 9, 30 access point privacy mode 25 acknowledgement delay 27 ad hoc network 9, 28 adapter , choosing 19 administration password, changing [...]

E encryption settings 31 string 32 encryption, association with differ ent settings 32 ESSID 24 F filtering port 23 protocol 23 firmware upgrade 34 flow control 26 G grounding antennas 11 guidelines, security 32 H help file location 22 help file path 22 hexadecimal keys 32 I installation 10 bridge 10 connecting to a wired network 15 firmware [...]

restoring settings to factory defaults 34 restrictions, channel and power 12 returning products for r epair 43 RSSI broadcasting 27 S safety information 13 saving configuration changes 21 secure web server connection 22, 39 security 31 128-bit Dynamic Security Link 33 128-bit Shared Key 33 40-bit Shared Key (Wi-Fi) 32 guidelines 32 no security 32 [...]