3Com Router WL-537 User Manual

Forgotten Password and Reset to Factory Defaults105
Forgotten Password 
and Reset to 
Factory DefaultsIf you can browse to the Router configuration screen but cannot log on 
because you do not know or have forgotten the password, follow the 
steps below to reset the Router to it’s factory default configuration. 
CAUTION: All your configuration changes will be lost, and you will need 
to run the configuration wizard again bef ore you can re-establish your 
Router connection to the Internet. Also, other...

106CHAPTER 6: TROUBLESHOOTING
■If you have a wired and a wireless NIC in the same computer, ensure 
that the wired NIC is disabled.
■Check the status of the Router Wireless LED, it should be lit if wireless 
is enabled and will flash when there is wireless activity. If not lit go to 
“Wireless Settings”
 and enable wireless networking.
■Ensure that the TCP/IP settings for all devices are correct.
■Ensure that the Wireless Clients are using the same SSID or Service 
Area Name as the Router. The SSID is...

Power LED or Power Adapter OK LED Not Lit107
■Speed of connection: The 802.11b and 802.11g standards will 
automatically choose the best speed depending on the quality of your 
connection. As the signal quality weakens then the speed falls back to 
a lower speed. The speeds supported by 802.11g are 54 Mbps, 
48 Mbps, 36 Mbps, 24 Mbps, 18 Mbps, 12 Mbps, and 6 Mbps. The 
speeds supported by 802.11b are 11 Mbps, 5.5 Mbps, 2 Mbps and 
1 Mbps. In general the closer you are to the Router the better the...

108CHAPTER 6: TROUBLESHOOTING
Alternatively, quote the part number for your region:
Power Adapter Part Numbers
Alert LEDThe Alert LED will flash when the Router unit is first powered up while 
the system software checks the hardware for proper operation. Once the 
Router has started normal operation , the Alert LED will go out.
■If the Alert LED does not go out following start up, but illuminates 
continuously, this indicates that the software has detected a possible 
fault with the hardware. Remove...

Frequently Asked Questions109
Router will enter a “recovery” state; DHCP is disabled, and the LAN IP 
address is set to 192.168.1.1. Follow  the instructions below to upload a 
new copy of the system software  to a Router unit in this state.
Ensure that one of your computers has  a copy of the new software image 
file stored on its hard disk or available on CD-ROM.
The latest software is available on 3Com’s Web site at:
www.3com.com .
1Remove power from the Router and  disconnect the Cable/DSL modem...

110CHAPTER 6: TROUBLESHOOTING
How many computers on the LAN does the Router support?
A maximum of 253 computers on the LAN are supported.
How many wireless clients does the Cable/DSL Router support? A maximum of 128 wireless clients are supported.
There are only 4 LAN ports on the Router. How are additional 
computers connected? You can expand the number of connections available on your LAN 
by using hubs, switches and wire less access points connected to 
the Router. 3Com wireless access po ints and...

A
USING DISCOVERY
Running the 
Discovery
Application3Com provides a user friendly Discovery application for detecting the 
Router on the network.
Windows Installation (95/98/2000/Me/NT)
1Insert the Router CD-ROM  in the CD-ROM drive on your computer. A 
menu will appear; select  Router Discovery.
Discovery will find the Router even  if it is unconfigured or misconfigured.
Discovery Welcome Screen
2 When the  Welcome screen is displayed click on  Next and wait until the 
application discovers the Routers...

112APPENDIX A: USING DISCOVERY
3Highlight the  Cable/DSL Router  by clicking on it, and press  Next.
4 Click on  Finish to launch a web browser an d display the login page for 
the Router.
Discovered Finish !Screen
Discovered Router Screen 

B
IP ADDRESSING
The Internet 
Protocol SuiteThe Internet protocol suite consists of a well-defined set of 
communications prot ocols and several standard application protocols. 
Transmission Control Protocol/Internet  Protocol (TCP/IP) is probably the 
most widely known and is a combination of  two of the protocols (IP and 
TCP) working together. TCP/IP is an internationally adopted and 
supported networking standard that provides connectivity between 
equipment from many vendors over  a wide variety of...

114APPENDIX B: IP ADDRESSING
For your network to work correctly,  all devices on the network must have:
■The same sub-network address.
■The same subnet mask.
The only value that will be different is the specific host device number. 
This value must always be unique.
An example IP address is ‘192.168.100.8’.  However, the size of the 
network determines the structure of this  IP Address. In using the Router, 
you will probably only encounter tw o types of IP Address and subnet 
mask structures.
Ty p e  O...