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24

C

HAPTER

 4: T

ROUBLESHOOTING

Disconnecting the 
Bridge

1

Unplug the workgroup bridge Ethernet cable from the hub or other device.

2

Unplug the workgroup bridge power cord.

Uninstalling the 
Infrastructure Device 
Manager

Use the standard operating system procedure for removing programs. Under most 
Windows operating systems, from the Start menu select Settings and then select 
Control Panel. In the Control Panel, double click Add/Remove Programs and follow 
the prompts to remove the program.

Uninstalling 
Configuration Help 
Files

???what is the procedure? do we need a procedure??

Upgrading Bridge 
Firmware

Firmware is the software that is installed on the bridge at the factory. Some problems 
can be solved by installing a new version of the firmware (

upgrading firmware)

For details on how download a firmware update from the 3Com customer support 
Web site and install it on your bridge, see “Upgrading the System” on page 19.

Two workgroup bridges cannot 
communicate in ad hoc mode.

To ensure correct operation in ad hoc mode, the settings on 
the two bridges must match exactly. Make sure that the 
Wireless LAN Service Area, channel selections, Data Preamble 
setting, and security setting are the same on both bridges. 

128-bit security settings do not 
work in ad hoc mode.

128-bit security settings are not supported in ad hoc mode. 
Use 40-bit Shared Keys setting instead.

You are running Windows 95 
or Windows NT. After you 
connect the workgroup bridge, 
your computer cannot obtain a 
valid IP address.

The workgroup bridge configuration settings may not be 
compatible with the network. If they are not, and your 
Windows 95 or Windows NT computer is set up to obtain its 
IP address from a DHCP server, the workgroup bridge is 
unable to associate with the network to obtain the IP 
address. To work around this problem, set a static IP address 
on your computer. Then set the workgroup bridge 
configuration to match the network. When the bridge is able 
to associate, reset your computer to obtain its IP address from 
the DHCP server.

Symptom

Solutions

CAUTION:

 Disconnecting the bridge ends the network association. To avoid 

possible data loss, exit all networking applications on connected devices before 
you disconnect the bridge.

Содержание WL-308

Страница 1: ...om com http support 3com com registration frontpg pl 11 Mbps Wireless LAN Workgroup Bridge User Guide Quickly and cost effectively create Wi Fi certified workgroups Version 1 Published December 2001 Version 1 0 3 ...

Страница 2: ...ed to you UNITED STATES GOVERNMENT LEGEND If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following All technical data and computer software are commercial in nature and developed solely at private expense Software is delivered as Commercial Computer Software as defined in DFARS 252 227 7014 June 1995 or as a...

Страница 3: ...tion 10 Computer Connection 10 Checking the LED Indicators 10 Summary of Configuration Steps 11 Installing the Infrastructure Device Manager 11 3 CONFIGURING WORKGROUP BRIDGES Locating a Wireless Device 13 Entering Clearing and Applying System Configuration Settings 14 Changing System Properties 14 Setting IP Network Properties 15 Refreshing the Client List 15 Setting Wireless Network Properties 1...

Страница 4: ...Password 20 Backing up a Configuration 20 Restoring a Configuration 21 Viewing System Status 21 Interoperating with Third Party Equipment 21 4 TROUBLESHOOTING Disconnecting the Bridge 24 Uninstalling the Infrastructure Device Manager 24 Uninstalling Configuration Help Files 24 Upgrading Bridge Firmware 24 INDEX REGULATORY COMPLIANCE INFORMATION ...

Страница 5: ...ork through a wireless LAN access point such as the 3Com 11 Mbps Wireless LAN Access Point 6000 Infrastructure configurations extend your wireless LAN to devices that would otherwise have to be connected to the wired network Operating in ad hoc mode two or more bridges can associate among themselves at close range without an access point allowing their workgroups to communicate You may wish to set...

Страница 6: ...orkgroup Ad Hoc Networks You can provide flexible wireless network association for small groups in areas that cannot be wired as shown below Product Registration and Support To register your product with 3Com go to the following Web page http support 3com com registration frontpg pl For support information log on to the 3Com Web site at http www 3com com and navigate to the product support page ...

Страница 7: ...ireless LAN access point The location should be away from transformers heavy duty motors fluorescent lights microwave ovens refrigerators or other equipment that could cause radio signal interference Do I Need to Configure the Bridge If your network has a DHCP server and no special security requirements you can use the workgroup bridge just as it is shipped from the factory If your network is more...

Страница 8: ... device can associate with the network through the bridge To refresh Help File Location Local Drive Help File Path c Program Files 3Com Management Help IP Network Setting Obtain IP address automatically IP Address Obtained automatically Subnet Mask Obtained automatically Gateway IP Address Obtained automatically Clear Channel Select Off Channel Uses access point channel Wireless LAN Service Area A...

Страница 9: ...om NBX Telephone Set Connection You can provide converged voice and data services in an office cubicle that is not wired for Ethernet by connecting the bridge to a 3Com NBX telephone set as shown below The NBX server is connected to the same switch or router to which the access point is connected Uplink port Make sure that the workgroup bridge Ethernet cable is plugged into the hub uplink MDIX por...

Страница 10: ...n also allows you to configure a bridge before connecting it to another device Checking the LED Indicators When the bridge is connected to power two LEDs indicate activity as described below LED Indicator Location Description Wireless association On the top of the bridge On Unit is receiving power Off Unit is not receiving power Blinking The unit is transmitting or receiving Faster blinking indica...

Страница 11: ...s ways to connect the bridge see Connecting the Bridge on page 8 Installing the Infrastructure Device Manager The 3Com installation CD contains the 3Com Wireless Infrastructure Device Manager a tool that helps you select 3Com wireless LAN devices and launch their configuration management systems The device manager must be installed on a computer that has an Ethernet adapter and is running one of t...

Страница 12: ...12 CHAPTER 2 INSTALLING THE WORKGROUP BRIDGE ...

Страница 13: ...aunch the device manager select Start Programs 3Com Wireless Infrastructure Device Manager 3Com Wireless Infrastructure Device Manager If you have more than one network adapter installed on your computer you may be prompted to choose a network adapter Choose the appropriate adapter and click OK The Wireless Network Tree appears in the 3Com Wireless Infrastructure Device Manager window The tree lis...

Страница 14: ...ion settings take effect and you can see the changes on the System Summary page Changing System Properties Under System Configuration click System Properties The System Properties page displays the properties of the selected device You can change properties by entering values in the fields and clicking the radio buttons see the following table When you are finished click Enter or Apply all Changes...

Страница 15: ...cable from the hub or the bridge 2 Use the 3Com Wireless Infrastructure Device Manager to select the workgroup bridge and launch its configuration management system Device Location Optionally you can enter the location of the device None Help File Location Web Server Help files are located on the network at the specified Help File Path Local Drive Help files are located on the client at the specif...

Страница 16: ...actly Therefore if you change the access point WLAN service area make sure to change the bridge WLAN service area also Clear Channel Select When the network mode is Access Point Infrastructure this option is enabled automatically and cannot be changed When this option is enabled the device scans the primary channels to determine the traffic on those channels and chooses the channel with the least ...

Страница 17: ...iguration click Wireless Network 3 In the Wireless Network page a Locate the Network Mode field and click Ad hoc Peer to Peer b The Wireless LAN Service Area defaults to Any ESSID and Clear Channel Select defaults to On automatically select the best channel Optionally you can specify the Wireless LAN Service Area and the Channel as described in Setting Wireless Network Properties on page 16 c Clic...

Страница 18: ...t data but still allows communication among compatible wireless LAN clients and access points from third party manufacturers that are Wi Fi certified This type of security requires you to set up encryption in one of the following ways String For use only with other 3Com 11 Mbps wireless LAN devices an encryption string is a case sensitive string of characters between 6 and 30 characters long To en...

Страница 19: ...guration settings To reset the bridge under Tools click Reset Wireless Workgroup Bridge In the next page click Reset Restoring a Bridge to Factory Defaults You can restore bridge settings to the defaults that were set at the factory as follows 1 Under Tools click Restore Factory Defaults 2 Click Restore You can also restore the bridge factory settings by inserting a pointed object such as the end ...

Страница 20: ... the file name displayed is the same as the name you got from the 3Com Web site If it is not the same delete it and enter the name you got from the Web site 5 Enter the IP address of the 3Com TFTP server 6 Click Upgrade Changing the Administration Password The first time you launch the Configuration Management System on the device or after you reset a device to factory defaults you are prompted to...

Страница 21: ...n will change the IP address If you want to continue configuring the bridge do the following 1 Close your browser 2 Return to the 3Com Wireless Infrastructure Device Manager and click Refresh 3 Select the device and click Configure to start a new configuration session Viewing System Status Under System Status you can view the following information Click Connection Status to see the data rate and s...

Страница 22: ...22 CHAPTER 3 CONFIGURING WORKGROUP BRIDGES ...

Страница 23: ... a backup configuration or after you reset the bridge to factory defaults the Configuration Management System stops responding and you cannot continue configuring the bridge If you change the IP address and click Apply all Changes you cannot continue to configure the device using the old IP address Therefore you should click Enter if want to continue configuring this device after you make this cha...

Страница 24: ...in ad hoc mode the settings on the two bridges must match exactly Make sure that the Wireless LAN Service Area channel selections Data Preamble setting and security setting are the same on both bridges 128 bit security settings do not work in ad hoc mode 128 bit security settings are not supported in ad hoc mode Use 40 bit Shared Keys setting instead You are running Windows 95 or Windows NT After ...

Страница 25: ...4 G guidelines security 18 H hexadecimal keys 18 I infrastructure 5 installation bridge 7 firmware bridge 19 24 interoperating with third party equipment 21 IP address 8 13 specifying 15 K keys 18 L LED access point 10 N network 5 ad hoc 5 17 traffic settings 16 17 Network Mode 16 17 NIC choosing 14 No Security 18 O open system 18 P password 20 changing administrator 20 performance settings 16 17 ...

Страница 26: ......

Страница 27: ...es Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from the one which the receiver is connected to Consult the dealer or an experienced radio TV technician for help The user may find the following booklet prepared by the Federal Communications Commission helpful The Interference Handbo...

Страница 28: ...ctromagnetic compatibility and Radio spectrum Matters ERM ElectroMagnetic Compatibility EMC standard for 2 4 GHz wideband transmission systems and HIgh PErformance Radio Local Area Network HIPERLAN equipment EN 60950 Safety of information technology equipment including electrical business equipment SAFETY COMPLIANCE NOTICE This device has been tested and certified according to the following safety...

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