Chapter 10 Wireless LAN

 

Table 55 WIRELESS > Wi-Fi > Wireless Card (continued)

 

LABEL

DESCRIPTION

 

802.11 Mode

Select 802.11b Only to allow only IEEE 802.11b compliant WLAN devices to

 

 

associate with the ZyWALL.

 

 

Select 802.11g Only to allow only IEEE 802.11g compliant WLAN devices to

 

 

associate with the ZyWALL.

 

 

Select 802.11b+g to allow both IEEE802.11b and IEEE802.11g compliant WLAN

 

 

devices to associate with the ZyWALL. The transmission rate of your ZyWALL might

 

 

be reduced.

 

 

Select 802.11a Only to allow only IEEE 802.11a compliant WLAN devices to

 

 

associate with the ZyWALL.

 

 

 

 

Super Mode

Select this to improve data throughput on the WLAN by enabling fast frame and

 

 

packet bursting.

 

 

At the time of writing, this works only when the wireless client is using an Atheros card.

 

 

 

 

Choose

Set the operating frequency/channel depending on your particular region. To manually

 

Channel ID

set the ZyWALL to use a channel, select a channel from the drop-down list box. To

 

 

have the ZyWALL automatically select a channel, click Scan instead.

 

 

 

 

Scan

Click this button to have the ZyWALL automatically select the wireless channel with

 

 

the lowest interference.

 

 

 

 

RTS/CTS

This is the threshold (number of bytes) for enabling RTS/CTS handshake. Data with a

 

Threshold

frame size larger than this value will perform the RTS/CTS handshake. Setting this

 

 

attribute to be larger than the maximum MSDU (MAC service data unit) size turns off

 

 

the RTS/CTS handshake. Enter a value between 256 and 2346.

 

 

If you select Super Mode, this field is grayed out and the ZyWALL uses 2346

 

 

automatically.

 

 

 

 

Fragmentation

This is the threshold (number of bytes) for the fragmentation boundary for directed

 

Threshold

messages. It is the maximum data fragment size that can be sent. Enter a value

 

 

between 256 and 2346.

 

 

If you select Super Mode, this field is grayed out and the ZyWALL uses 2346

 

 

automatically.

 

 

 

 

Output Power

Set the output power of the ZyWALL in this field. If there is a high density of APs in an

 

 

area, decrease the output power to reduce interference with other APs. Select one of

 

 

the following 100% (full power), 50%, 25%, 12.5% or min (minimum). See the product

 

 

specifications for more information on your ZyWALL’s output power.

 

 

 

 

Enable

Roaming allows wireless stations to switch from one access point to another as they

 

Roaming

move from one coverage area to another. Select this checkbox to enable roaming on

 

 

the ZyWALL if you have two or more ZyWALLs on the same subnet.

 

 

Note: All APs on the same subnet and the wireless clients must have

 

 

the same SSID to allow roaming.

 

 

 

 

Select SSID

An SSID profile is the set of parameters relating to one of the ZyWALL’s BSSs. The

 

Profile

SSID (Service Set IDentifier) identifies the Service Set with which a wireless client is

 

 

associated. Wireless clients associating with the access point (AP) must have the

 

 

same SSID.

 

 

Note: If you are configuring the ZyWALL from a computer connected

 

 

to the wireless LAN and you change the ZyWALL’s SSID or

 

 

security settings, you will lose your wireless connection when

 

 

you press Apply to confirm. You must then change the wireless

 

 

settings of your computer to match the ZyWALL’s new settings.

 

 

 

 

#

This field displays the index number of each SSID profile.

 

 

 

 

Active

Choose a profile to apply to your wireless network by selecting its radio button.

 

 

 

 

Name

This field displays the identification name of each SSID profile on the ZyWALL.

 

 

 

 

225

ZyWALL 2WG User’s Guide