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Advanced

Request to send (RTS) Threshold: In some situations, not all clients in a WLAN
are aware of each other (hidden node problem). That can lead to different
WLAN clients transmitting to the Gateway at the same time, therefore
jamming each other’s transmission. RTS Threshold is a packet size above
which the Gateway will expect to use the RTS mechanism. This is negotiated
with the client.

The client issues an RTS signal (before data packets were sent) to advise the
Gateway nearby that it has a large packet to send. The Gateway then issues a
clear to send (CTS) signal to all clients, which keeps the other clients waiting
while the requesting client sends its data.

The default value for the IBM High Rate Wireless LAN Gateway is

2432

, which

is large so that RTS does not activate in most cases. In most network
environments, RTS is not necessary or desired, since it reduces performance.

The Fragmentation Threshold figure determines whether a long packet is split
into several shorter packets. This is done for efficiency reasons. Packets longer
than the Fragmentation Threshold are split, resulting in better network
performance.

Part 4: Setting up the access point in the IBM High Rate Wireless LAN Gateway

4-3

Summary of Contents for 22P6401

Page 1: ...IBM High Rate Wireless LAN Gateway User s Guide OPTIONS by IBM ...

Page 2: ...re operating the device v Safety information v Information to the user including regulatory information and additional installation requirements v Federal Communications Commission FCC statement v Product warranty and notices v Help and service information First Edition August 2001 Copyright International Business Machines Corporation 2001 All rights reserved US Government Users Restricted Rights ...

Page 3: ... Point General Information 4 5 Part 5 Setting up client computers for Internet access 5 1 Client computer requirements 5 1 System requirements 5 1 Part 6 Using tools for advanced configuration 6 1 Advanced configuration 6 1 LAN configuration 6 1 DMZ configuration 6 2 Virtual server 6 3 Packet filtering 6 4 DHCP configuration 6 7 Static Routing table 6 10 Language select 6 11 Change password 6 12 R...

Page 4: ...iv IBM High Rate Wireless LAN Gateway User s Guide ...

Page 5: ...urchasing OPTIONS by IBM Please take a few moments to register your product and provide us with information that will help IBM to better serve you in the future Your feedback is valuable to us in developing products and services that are important to you as well as in developing better ways to communicate with you Register your option on the IBM Web site at http www ibm com pc register IBM will se...

Page 6: ...vi IBM High Rate Wireless LAN Gateway User s Guide ...

Page 7: ...es v Single shared ISP account with network address translation NAT NAT works by translating the data packets IP address from the one provided by the Internet service provider ISP to the IP address of the computer attached to the IBM High Rate Wireless LAN Gateway All computers on the network can share a single ISP account v Dynamic host configuration protocol DHCP The IBM High Rate Wireless LAN G...

Page 8: ...eway has ESSID for wireless network segmentation MAC address registration and wireless equivalency protection WEP 64 and 128 bit encryption v Virtual private networks VPN The IBM High Rate Wireless LAN Gateway supports the following VPNs IP Security IPSec passthrough Point to point tunneling protocol PPTP passthrough Point to point protocol over Ethernet PPPoE for DSL Note Functions listed above t...

Page 9: ...or use in Japan v One RJ 45 Ethernet cable v IBM High Rate Wireless LAN Gateway Quick Start Guide v IBM High Rate Wireless LAN Gateway Safety and Warranty Information v IBM High Rate Wireless LAN Gateway User s Guide CD The included CD contains the following items This User s Guide in PDF format Adobe Acrobat Reader If any of the above items are missing or damaged contact the place of purchase Par...

Page 10: ...1 4 IBM High Rate Wireless LAN Gateway User s Guide ...

Page 11: ...nada and one is labeled for use in Japan f Turn on your DSL Cable modem g Turn on your computers 2 Connect your computer to the Gateway v If you are making a wireless connection your computer s wireless LAN adapter must be configured to find and communicate with the IBM High Rate Wireless LAN Gateway See the manual or User s Guide that comes with your computer s wireless LAN adapter The default se...

Page 12: ...TCP IP setting for the network adapter identified in step 2 d Click Properties e Click the IP Address tab f Click to check the Obtain an IP address automatically radio button g Click the DNS Configuration tab h Click to check the Disable DNS radio button i Click OK j Click OK again If you are using Microsoft Windows 2000 Professional do the following to set up Microsoft Networking properties a Cli...

Page 13: ...operties e Select Internet Protocol TCP IP from the components list f Click Properties g Click to check the Obtain an IP address automatically radio button h Click to check the Obtain DNS server address automatically radio button i Click OK j Click OK again Part 2 Quick setup 2 3 ...

Page 14: ...disable the proxy settings If you are using Microsoft Internet Explorer do the following to disable proxies Note Your version of Internet Explorer must be 5 0 or higher a Launch Internet Explorer b Click the Tools menu and then select Internet Options c Click the Connections tab d Click LAN Settings e Clear all of the check boxes See the following illustration to locate the check boxes you must cl...

Page 15: ...r higher a Launch Netscape Navigator b Click the Edit menu and then select Preferences c Click the sign next to Advanced d Click Proxies e Click to check the Direct Connection to the Internet radio button f Click OK 5 In the Address field in your Internet Explorer Browser Location field in Navigator type the address of the Gateway Part 2 Quick setup 2 5 ...

Page 16: ...Type default in the User Name field and then click OK Note default is the default user name There is no default password 7 A Web page opens asking you to select a language v Select your language by clicking the appropriate icon The language home page opens 2 6 IBM High Rate Wireless LAN Gateway User s Guide ...

Page 17: ...ep 9 If your DSL or cable modem provider provides you with information for a Dynamic IP Address Static Fixed IP Address or PPPoE for DSL Address go to step 8 b b Click Internet broadband settings c Configure your Internet broadband settings Note Some fields might not be used for all ISP configurations v If your ISP provides you with information for a Dynamic IP address click the Dynamic IP Address...

Page 18: ...adio button enter the appropriate information in the fields and then click Apply v If your ISP provides you with information for a PPPoE for DSL address click the PPPoE for DSL radio button enter the appropriate information in the fields and then click Apply 2 8 IBM High Rate Wireless LAN Gateway User s Guide ...

Page 19: ...9 Launch a new Web browser and attempt to connect to the Internet through the Gateway Part 2 Quick setup 2 9 ...

Page 20: ...2 10 IBM High Rate Wireless LAN Gateway User s Guide ...

Page 21: ...Gateway is preconfigured with the default IP address of 192 168 1 1 1 Launch your Web browser on a computer you have configured for TCP IP networking 2 Be sure that the computer and the Gateway have LAN IP addresses on the same subnet 3 Type http 192 168 1 1 into the Location field in Netscape Navigator or the Address field in Internet Explorer at the top of the browser window and then press Enter...

Page 22: ...iate icon The Language home page opens The following is a list of buttons and links displayed on the Web based interface v Apply Stores the new configurations into flash memory after configuration is completed v Add Adds a new entry into the configuration table v Modify Modifies an entry in the configuration table v Cancel Cancels the configurations and restores previous values 3 2 IBM High Rate W...

Page 23: ...tion v Delete Deletes an entry in the configuration table Saving configurations The configuration changes made through the Web interface are automatically saved into the flash memory within 30 seconds after clicking Apply For more information see Part 6 Using tools for advanced configuration on page 6 1 Part 3 Configuration graphical user interface GUI 3 3 ...

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Page 25: ...e modem printer file server or other wireless clients In the language home page click Wireless settings The following three items are displayed in the left frame v Advanced v MAC control setup v Status monitor The Network Name or SSID ESSID window is displayed in the right frame Clients must carry the same SSID or use ANY before they can communicate with or through the Gateway The factory default ...

Page 26: ...Key You can create up to four WEP keys After enabling WEP you must enter the same WEP key in the client computers otherwise they will be refused a connection When WEP is enabled type the WEP key in the WEP Key 1 field You can type your WEP key in one of two ways v Five alphanumeric characters for 64 bit encryption or 13 alphanumeric characters for 128 bit encryption The range of characters is a z ...

Page 27: ...cket to send The Gateway then issues a clear to send CTS signal to all clients which keeps the other clients waiting while the requesting client sends its data The default value for the IBM High Rate Wireless LAN Gateway is 2432 which is large so that RTS does not activate in most cases In most network environments RTS is not necessary or desired since it reduces performance The Fragmentation Thre...

Page 28: ...er with the correct ESSID and within range of your access point can access your Gateway if there are no other means of protection Enabling this mechanism provides protection to your Gateway Enable MAC Address Control In this field you can type the MAC address of the wireless clients whose access you want to control Block or Allow You can list specific MAC addresses to bock or allow in this window ...

Page 29: ...ts 0 v Multicast Packets 0 v Multicast Bytes 0 v Multicast Bytes 0 v Wireless Transmit Error v Wireless Receive Error v Deferred Transmissions 0 v Packet FCS Errors 0 v Retry Limit Exceed 0 v Discards No Buffer 0 v Single Retries 0 v Discards WEP Errors 0 v Multiple Retries 0 v Discards Wrong Source Address 0 v Discards Other Reason 0 The following list provides descriptions about the statistics l...

Page 30: ... without errors Multicast Bytes The number of bytes in multicast packets that are received without error v Wireless Transmit Error Deferred Transmissions The number of packets successfully transmitted after the wireless MAC defers transmission at least once Retry Limit Exceed The number of packets not transmitted doe to excessive retries Single Retries The number of packets successfully transmitte...

Page 31: ... Discards WEP Errors The number of packets discarded due to WEP check error Part 4 Setting up the access point in the IBM High Rate Wireless LAN Gateway 4 7 ...

Page 32: ...4 8 IBM High Rate Wireless LAN Gateway User s Guide ...

Page 33: ...ndows 95 Windows 98 Windows 98SE Microsoft Windows NT 4 0 workstation Microsoft Windows 2000 Professional and Microsoft Millennium Edition Me 3 The Gateway routes only TCP IP from the LAN ports to the Internet broadband port On the LAN switch hub it handles any typical Ethernet traffic Setting up Windows 95 Windows 98 and Windows Me clients If you use the built in DHCP server the server provides t...

Page 34: ... configure the IP address of your computer To manually configure the IP address of your computer do the following 1 Click Start Settings Control Panel 2 Double click Network 3 Double click TCP IP 4 Click the IP Address tab 5 Select Specifying an IP Address 6 Type the IP address for your computer 7 Type the subnet mask If you choose to keep the default subnet mask setting on your server type 255 25...

Page 35: ...r instructions on installing the TCP IP protocol Use the built in DHCP server to configure the TCP IP settings of your Windows 2000 Professional computer The server provides the following TCP IP configuration information to your computer v IP address of the computer v Subnet mask of the computer v IP address of the default gateway which is also the IP address of the server v DNS server To configur...

Page 36: ...ot want to use DHCP service you must manually configure the IP address of your computer To manually configure the IP address f your computer do the following 1 Click Start Settings Control Panel 2 Double click Network and Dial up Connections 3 Right click the icon for the network connection 4 Select Properties 5 In the network protocols list double click TCP IP 6 Click to check the Specifying an I...

Page 37: ...address of the computer v Subnet mask of the computer v IP address of the default gateway which is also the IP address of the server v DNS server To configure a Windows NT 4 0 Workstation computer as your client computer do the following 1 Click Start Settings Control Panel 2 Double click Network 3 Click the Protocols tab 4 In the network protocols list double click TCP IP 5 Click the IP Address t...

Page 38: ...tab 9 Add the IP address of the server to the DNS Service Order list 10 Add the name of the computer to the Host Name field 11 Save the changes and then restart your computer Your computer can access the Internet through the server 5 6 IBM High Rate Wireless LAN Gateway User s Guide ...

Page 39: ...TCP IP settings of the Ethernet LAN interface of the Gateway v MAC Address This changes the media access control MAC address of the LAN interface It is displayed in six pairs of hexadecimal numbers Note This field is read only v LAN IP Address This is the IP address of the LAN interface of the Gateway The IP address value uses dotted decimal notation N N N N with N being a value from 0 to 255 The ...

Page 40: ...et mask of the LAN interface of the Gateway The default is 255 255 255 0 Click Apply to complete the LAN configuration Note The configuration changes made through the Web based interface are automatically saved into the flash memory within 30 seconds after clicking Apply DMZ configuration With DMZ you can expose a specific computer to the Internet for special applications and faster Internet gamin...

Page 41: ... Server Configuration to display the Virtual Server table This table displays the status of the Virtual Servers on the LAN You can enable or disable virtual server by selecting Enable or Disable from the pull down menu at the top of the table Note You must click Apply for the enabling or disabling to take effect 2 To add a Virtual Server click Add v Virtual Server Enable or disable the Virtual Ser...

Page 42: ...The server s IP address must be typed into the Excluded IP table Click Apply to complete the configuration of your Virtual Server Note The configuration changes made through the Web interface are automatically saved into the flash memory within 30 seconds after clicking Apply Packet filtering By default all users can access all services on the Internet With packet filtering the network Administrat...

Page 43: ...re are two rules to define packet filtering IP rule and Port rule IP rule To filter packets using the IP rule do the following 1 Click IP Rule to display the IP rule table 2 Click Add 3 Enter the IP address of the Internet site that the LAN users are prohibited from accessing Part 6 Using tools for advanced configuration 6 5 ...

Page 44: ...y into the Port rule table v Service Type TCP or UDP service v Protocol Select the protocol or application such as FTP or HTTP If a well known protocol is selected from the list then the corresponding port number is set according to various Internet standards The Port Edit box is disabled Click User Defined to specify a protocol not found in the list v Port Specifies the TCP or UDP port number Use...

Page 45: ...g settings to the client computers v IP Address v Subnet Mask v Default Gateway v DNS Server To adjust the DHCP configuration on your Gateway do the following 1 Click Advanced Configuration and then click DCHP Configuration to display the DHCP table v DHCP The DHCP feature can be enabled or disabled v DHCP Start Address This is the starting IP address of the IP address pool in the DHCP server The ...

Page 46: ... the client device This IP address must be within the address pool in the DHCP server v MAC Address The MAC address of the client device v Remark The descriptions of the client device that needs the fixed IP address 3 Click Apply A new entry is added to the Fixed IP table Note The configuration changes made through the Web interface are automatically saved into the flash memory within 30 seconds a...

Page 47: ...uration changes made through the Web interface are automatically saved into the flash memory within 30 seconds after clicking Apply BOOTP IP Table These are IP addresses reserved for the user using a BOOTP protocol to get an IP address The IP address must be within the address pool To specify an IP address to be used by the BOOTP protocol do the following 1 Click Advanced Configuration DHCP Config...

Page 48: ...flash memory within 30 seconds after clicking Apply Static Routing table The IBM High Rate Wireless LAN Gateway supports static TCP IP routing It can serve as a router between two different TCP IP networks or subnets In the static routing table you can exchange packets with other network segments The static routing table might be necessary when there are other routers on your network and at least ...

Page 49: ... be forwarded v Interface Output interface to which packets will be forwarded It can be the LAN Ethernet or Internet broadband port 3 Click Apply A new entry is added to the routing table Note The configuration changes made through the Web interface are automatically saved into the flash memory within 30 seconds after clicking Apply Language select Click Advanced Configuration and then click Langu...

Page 50: ...ge password Click Change password to display the Change password table The Administrator Login Name and Administrator Login Password can be changed in this table The default login name is default A password is not required For security reasons change the Administrator profile settings Click Apply to complete the configuration 6 12 IBM High Rate Wireless LAN Gateway User s Guide ...

Page 51: ...factory defaults to display the Reset to factory default page Click the Reset factory defaults button The following dialog box is displayed Click OK to clear the new settings and restore all of the factory defaults Restart Wireless Gateway To restart your Gateway click Restart wireless gateway The following dialog box is displayed Part 6 Using tools for advanced configuration 6 13 ...

Page 52: ...h Rate Wireless Gateway For information on the System information and the Help functions of the IBM High Rate Wireless LAN Gateway see Part 7 System information and help on page 7 1 6 14 IBM High Rate Wireless LAN Gateway User s Guide ...

Page 53: ...version of the Gateway hardware v Software Version Displays the version of the Gateway software v System up Time Displays the elapsed time since you set up the system v LAN Status MAC Address The Ethernet MAC address of the LAN interface of the Gateway displayed in six hexadecimal numbers IP Address The IP address of the local LAN interface of the Gateway The default is 192 168 1 1 Subnet Mask The...

Page 54: ...y Gateway The Gateway IP Address provided by your ISP NAT Displays the status of the NAT DNS Server The IP address of the DNS Server Help Feature The GUI Management tool provides an easy help function to help you configure the Gateway You can click Help in each configuration window for help with configuring each parameter or you can click Help on the left side window to get general help informatio...

Page 55: ...s are correct for the server and the computer 1 If you are using a Windows based computer click Start Programs Accessories Command Prompt 2 Type PING 192 168 1 1 Note If you have changed the IP address of the Gateway type the new IP address after PING If you receive replies for this command the IP address of your computer is set up correctly If you do not receive replies for this command check tha...

Page 56: ...fferent than the network address of the remote device d Click System information to verify the Internet broadband status If the Internet broadband connection is not functioning check to be sure your DSL Cable modem is connected and functioning If you have just turned on your Gateway it might be necessary to reset your DSL Cable modem to get an IP address from the DHCP server at your ISP e If your ...

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