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Chapter 11 Wi-Fi Screens
ZyWALL 2WG User’s Guide
227
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.
Choose
Channel ID
Set the operating frequency/channel depending on your particular region. To manually
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.
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.
RTS/CTS
Threshold
This is the threshold (number of bytes) for enabling RTS/CTS handshake. Data with a
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
Threshold
This is the threshold (number of bytes) for the fragmentation boundary for directed
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
Roaming allows wireless stations to switch from one access point to another as they
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
Profile
An SSID profile is the set of parameters relating to one of the ZyWALL’s BSSs. The
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.
Table 55
WIRELESS > Wi-Fi > Wireless Card (continued)
LABEL
DESCRIPTION