Buffalo Technology AirStation Pro Intelligent WLM2-G54 User Manual

2.18 Mb

Figure 9.7 Basic Filter

9.6.3 Routing Table Entries

Set routing information recognition and elimination. Check the item to be eliminated; then click "Delete Checked Items."

9.7Basic Filter

This is a simple filter for limiting access to the


9.7.1 Filter Settings

Four filters can be enabled by clicking “add the rule.” They are:

A setup from a wireless LAN is forbidden. This will prohibit access to the WLM2G54’s configuration screen from a wireless client.

A setup from a wired LAN is forbidden. This will disable access to the configuration screens from a wired LAN PC.

A setup over an AP is forbidden. This keeps anyone who is actually connected to a DIFFERENT AP from configuring the WLM2-G54.

A request from a WLAN is ignored.

Changes to the parameters (DHCP, DNS, etc.) are locked out. If you make a mistake here and “lock yourself out,” the WLM2G54 can be returned to the factory default settings (ALL of them!) by holding down the INIT button on the back of the unit for 3 seconds.

9.7.2 Basic Filter Information

Displays the current settings. To change a setting, check the box on the item to be changed and click "delete the checked rules." The setting can be reset to the default by clicking "Initialize Rule."


Set up RADIUS parameters. When a client requests communication with the WLM2-G54access point, theWLM2-G54reports its own MAC address to the RADIUS server and asks for communication approval to the client. Once the client is recognized by the RADIUS, the RADIUS issues a key to the AP as well as the client for initiation of communications.

Server Name=The name of the RADIUS server or the IP address.

Port Number=The port number to be used at the RADIUS upon approval. Some systems use 1645 as the default port number.

Shared Secret=The secret key to be used between the WLM2-G54and the client. It is the same key used between the RADIUS server and the AP for communication. Use numeral characters between 1~255.

(see next page)

9.9.1 Manual Setting

MAC addresses may be added to the authorized list manually. If RADIUS is enabled, the user must first be authenticated. Enter the MAC address in the "MAC address of wireless LAN PC" field and click "add." The MAC address must be in two-digitgroups separated by colons. For example, 00:40:26:00:11:22. (see next page)


9.9.2 List of the Wireless PCs

Displays the PCs that are communicating with the WLM2-G54.Check the "registration" box and click the "change" button to add a MAC address.

9.9.3 Authorized Wireless LAN PCs

Displays all MAC addresses that are allowed to communicate with the WLM2-G54.The status shows the current active MAC addresses on the network. To eliminate a specific MAC address from the network, check the "delete" box and click the "change" button.

■ Note: If configuring from a wireless PC, add your MAC address to the list of authorized wireless LAN PCs (MAC restrict screen).

9.10 Wireless

Wireless communication parameters and how to use them under the "IEEE802.11g" page. (see next page)

9.10.1 Add Peer AirStation (MAC Address)

The wireless LAN MAC addresses of all AirStations that will be communicating with each other have to be registered in each AirStation. Up to 6 AirStations can be registered in one AP. Input the MAC address in the two-digitformat (00:40:26:00:11:22). Click "add" to register the MAC address. The added MAC address is checked in the "wireless MAC address" under the Diagnostic screen, on the Device Information page.

1.Open the Configuration Screen of the primary WLM2-G54,and go to the LAN Settings screen

2.The User Name should be "root", and there is no password unless you have set one up on a previous configuration session.

3.Click on the WDS link at the bottom left side of the screen.

Figure 9.8 RADIUS

Figure 9.9.1 Manual Setting


Figure 9.10 Wireless

Figure 9.11 Link Integrity Settings

4.You will need the Wireless MAC address of the target WLM2-G54.Enter its MAC address in the field labeled

"MAC Address of AirStation (Wireless)." Use the format XX:XX:XX:XX:XX:XX for the MAC address.

5.Click "Add." Repeat this process for up to 5 additional access points.

6.Once all of the MAC addresses are entered, repeat this process for each WLM2-G54you wish to set up forAP-APcommunications. The secondWLM2-G54must have the MAC address of the first one.

Example: Suppose you wish to set up three units, #1 as a central unit, with #2 and #3 talking to #1, but not to each other. AP #1 would have the MAC addresses of both #2 and #3, as noted above, but #2 and #3 would only have the MAC address of #1.

9.10.2 ESS-ID

Allows administrator to alter the ESS-IDof the AirStation. To communicate with a specific AP only, the AP’sESS-IDmust be entered in the client computer. The client looks only for that specific AP (orESS-ID)for wireless communication. Use up to 32 alphanumeric characters for theESS-ID(case sensitive). Roaming is possible by setting identicalESS-IDsand WEP inWLM2-G54s.

9.10.3 DS Channel (Wireless Channel Set)

The channel to be used for wireless communication. There are 11 channels.

■ Note: This is automatically set in the client computer.

9.10.4 MAC Restrict

Enable or disable access by MAC address through the wireless LAN network infrastructure mode.

9.10.5 EAP

Configure EAP authentication process.


Configure EAP in the Security/802.11g screen.

■ Note: For MAC Access Restriction, do not check the "Enable" box until you have set up Authorized MAC addresses (Section

9.10.6 Privacy, WEP

Set the encryption method used in wireless communications for the protection of your data. It is necessary that the WEP key match between two parties for secure communications. If multiple keys are used, the order must match between communicating devices. Examples of WEP key input are:

5 digits of ASCII characters. They are case sensitive and “_” is allowed, i.e. Skey5.

10 digits of hexadecimal numbers, i.e. a3d58b62fe.

If WEP is not used, leave the box blank or input all 0s, which is equivalent to no-WEP.

9.10.7 PS - Privacy Separator

Enables automatic selection of the WLM2G54 with the least load within the roaming area. If PS is used, communications between wireless clients will be automatically blocked. All clients are forced to go through the WLM2-G54and the system’s combined security measures.

9.10.8 BSS (Basic Service Set) Basic Rate Set

The transmission data rate between devices. If one device supports 2Mbps only, the data rate for the entire network will be limited to 2Mbps. Otherwise, use 11Mbps max.

9.10.9 DTIM Period

WLM2-G54transmits beacon signals to nearby clients in the preset interval. Once this option is used in the AP, the client must set the power management of the client card in order to control the beacon interval. Select a number from 1~255 sec. Selection of a larger number may save energy consumption, but it may delay wireless communication. The default value 1

Figure 9.12 Wireless Distribution System Settings


9.10.10 ANY Connection

Allows a client PC to connect to the nearest WLM2-G54by manually entering the word "any" for theESS-IDin the Client Manager. If the "ANY Connection" is deselected in theWLM2-G54,theWLM2-G54will not be found using theESS-IDof "any" in the client PC.

9.11 Link Integrity Settings

Link Integrity is a rerouting feature activated when the wired connection is lost.

(see previous page)

9.11.1 Link Integrity

Enable or disable the Link Integrity feature.

9.11.2 Destination Host

Specify a host server name to which the WLM2-G54sends packets to confirm connection.


Figure 10.2.1 Unit Information

Figure 10.2.2 Transfer Packet Information

9.11.3 Interval of Checking Connection

Interval timer to check connection with destination host.

9.11.4 Retry Count

The number of times a retry will be attempted when a failed connection is detected. The retry is performed every 2 seconds.

9.11.5 Apply Device

Specify wireless device that is applicable Link Integrity function.

9.11.6 Status

Link integrity status.

9.12 Wireless Distribution System


WDS is used for wireless communication between access points. Allows the WLM2G54 to communicate with up to 6 other WLM2-G54s.Since the communication method is proprietary and is not defined inWi-Fiinteroperable procedures, it communicates toWLM2-G54sonly, and not other brands of APs. The WDS setup is the same as repeater function setup.

Add AirStation

Connected AirStation



10.1Introduction IV

Diagnostics is a convenient tool for monitoring network operation and traffic.

10.2 Parameters for the Diagnostic Operation

The following parameters are used: Unit information, Packet information,Wireless LAN PC information, Ping testing, Log information and Setting initialization.


10.2.1 Unit Information

(see previous page)

Parameters used in the WLM2-G54:

1.Model Name:The AirStation model name and firmware version number

2.AirStation Name:The alias for the AirStation

3.Wired Settings: WLM2-G54’swired MAC address

4.Wireless Firmware:The wireless LAN card model name and firmware version number

5.Wireless MAC address: WLM2-G54’swireless MAC address

6.Wireless Setting: Indicates wireless communication setting such as WDS mode, ANY connection, PS, ESS-ID,WEP,Channel and System Scale

7.IP address setup: Selection for setting the IP address. If auto IP address acquisition from the DHCP server is selected, the acquisition success or failed parameter will be shown.

8.Link Integrity: Indicates whether Link Integrity is working

9.Auto IP address acquisition: Acquisition of the IP address from the DHCP or update is performed.

10.2.2 Transfer Packet Information

Displays the actual packet volume used for wired and wireless communication. Packet volume for transmission receiving and their errors are shown separately.

(see previous page)

10.2.3 Wireless LAN PC Information

This information displays all PCs using the WLM2-G54wireless communication. The MAC addresses of communicating clients are shown. The information is updated periodically.

10.2.4 Log Information

Includes system operation, login approval, and wireless communication access approval. A

Figure 10.2.3 Wireless LAN PC Information

Figure 10.2.4 Log Information


Figure 10.2.5 Ping Test

Figure 10.2.6 Return to Default Setting

log related to the setup history from a browser or Telnet session is recorded.

10.2.5 Ping Test

The WLM2-G54issues a ping test to the target PC in order for the AirStation to check the communication link. Input the target device’s IP address and click "OK".

10.2.6 Return to Default Setting

Allows the user to reinitialize all parameters back to factory defaults. After the reinitialization, the system will restart automatically.


Additional Information

For more information, please consult one of the following:

• The on-linehelp system of your AirStation wireless system - for information about software and driver functionality.

• The AirStation web site - for frequently asked questions (FAQ’s) and Software Updates.

Appendix A

Range Information

The range of your wireless devices can be affected when the AirStation is placed near metal surfaces and solid high-densitymaterials.

Range is also impacted due to “obstacles” in the signal path of the radio that may either absorb or reflect the wireless signal.


Appendix A - Intelligent Access Point (WLM2-G54)Specifications

Frequency Band

2.4GHz channel support

Operating Channels

11 channels; 20 MHz BW


1:2412, 2:2417, 3:2422, 4:2427, 5:2432,


6:2437, 7:2442, 8:2447, 9:2452, 10:2457, 11:2462


IEEE 802.11g, IEEE 802.3 (10BASE-T),IEEE 802.

1x/EAP, Wi-Fi


Data Rates Supported

54Mbps Fullback to 48, 36, 24, 18, 12, 9 and 6


54Mbps OFDM modulation


11Mbps Fallback to 5.5, 2 and 1


11Mbps – CCK modulation with Baker Code


5.5Mbps – DQPSK modulation


2 and 1 Mbps – DBPSK modulation

Typical Range at Low Speed

Outdoor: 550m (1804 ft); Indoor: 115m (377 ft) (*)

Typical Range at Standard Speed

Outdoor: 400m (1312 ft);


Indoor: 90m (295 ft) – Max


40m (130ft) – Normal (*)

Typical Range at High Speed

Outdoor: 160m (525 ft);


Indoor: 50m (164 ft) – Max


25m (82 ft) – Normal (*)


NDIS 5.0 Miniport Driver

Supporting OS

Windows 9x, ME, 2k, XP

Bit Error Rate

Less than 10-5


Integrated & capable to connect Buffalo indoor &


outdoor antennas



WAN – Protocols


Media Access Protocol


Status Indicators (LED)

Power, Ethernet activity, Wireless Activity,Diagnostics


IEEE802.1x/EAP, WEP 40 bit or 128 bit, RC 4 algorithm,

MAC address Monitoring/Filtering, ESS-ID,Password

Receive Sensitivity

-69dBm~-92dBm depending on the data rate

Delay Spread

65 ns~500 ns depending on the data rate

Output Power

15dBm, 1.2 A nominal and 0.16A PoE

Power Supply

Power over Ethernet 48VDC over 10Base-T

cabling (from PowerBASE-Tmodule), or 5V DC


Radio/Electromagnetic Conformance

ETS 300 328, ETS 300 826, CE, EMV to EN 60950)


(medical environment), FCC Part 15 B

Temperature & Humidity

0~60º C operational, -20~75ºC Storage,

95% (no condensation)



W169 x H46 x L195mm




Appendix B - Troubleshooting

This appendix is divided into following sections with each with it’s own specific troubleshooting tips:

LED Activity on section B.1.

Other Problems on section B.2.

B.1 LED Activity

Power LED should be GREEN

Wireless LED should be GREEN if the line is active. If is it blinking GREEN, wireless communication is in use.

Ethernet LED should be GREEN (100Mbps) or AMBER (10Mbps) while the communication is in use.

TABLE B.1 DIAG LED Activity Table




LED Display



Continuous Red


RAM Error

Red flash, 2 times


Flash ROM Error

Red flash, 3 times


problem in wired LAN side

Red flash, 4 times


problem in wireless LAN side

Red flash, 2 times

After setup completed

Flash ROM Error

Red flash, 2 times

During firmware update

Flash ROM Error

B. 2 Other Problems

Out of range, which prevents the AirStation Client from establishing a wireless connection with the network.

Configuration mismatch, which prevents the AirStation Client from establishing a wireless connection with the network

Absence or conflict of the AirStation Driver in the client PC.

Conflict of the AirStation hardware with another device.


10BaseT or 100BaseTx: 802.3 based Ethernet network that uses UTP (Unshielded twisted pair) cable and a star topology. 10 is 10 Mbps and 100 is 100 Mbps.

802.1x:The standard for wireless LAN authentication used between an AP and a client. 802.1x with EAP will initiate key handling.

AdHoc Network:The wireless network based onpeer-to-peerfor the duration of a communications session. Also referred to asAd-Hoc.

Address Aging Period: The maximum time during which the forwarding database entries are considered valid. This value should be set low if your network has regularly heavy traffic. Each new device that sends a packet to a device has its MAC address added to the System Forwarding Database. The Database can store up to a maximum of 8192 MAC addresses at any one time. After the maximum number of MAC addresses has been reached, the earliest stored addresses are overwritten with new, incoming information.

AES (Advanced Encryption Standard): A symmetric 128bit block data encryption technique used for security.

Bandwidth: The transmission capacity of a computer, or a communication channel, stated in Megabits per second (Mbps).

BOOTP: Software protocol used by servers. When the client PC starts, it contacts the server, and requests a new set of IP Configurations. The server obtains the new IP Configuration information from a static pool of available addresses.The client PC will keep its IP Configuration information until it is turned off and restarted. BOOTP is not always fully supported in newer operating systems.

BNC (British Naval Connector): A BNC connector has a bayonet-type shell with two small knobs on the female connector, which twist-lock into slots in the male connector. Used with coaxial cable.

BSS (Basic Service Set): An 802.11 networking framework that includes an Access Point.

Bus Mastering: A system in which the specified Input/Output device (e.g., NIC Card) can perform tasks without the intervention of the CPU.