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Navigating to Radio Settings
To specify radio settings, navigate to
Advanced > Radio
tab, and update the fields as
described below.
Configuring Radio Settings
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Field Description
Status (On/Off)
Specify whether you want the radio on or off by clicking On or Off.
Mode
The
Mode
defines the
Physical Layer
(
PHY
) standard being used
by the radio.
Select one of these modes:
IEEE 802.11b
• IEEE
802.11g
Channel
The
Channel
defines the portion of the radio spectrum that the
radio uses for transmitting and receiving. The range of channels
and the default channel are determined by the Mode of the radio
interface.
For most Modes, the default is “Auto”. Auto is the recommended
mode because it automatically detects the best channel choices
based on signal strength, traffic loads, and so on.
Beacon Interval
Beacon
frames are transmitted by an access point at regular
intervals to announce the existence of the wireless network. The
default behavior is to send a beacon frame once every 100
milliseconds (or 10 per second).
The
Beacon Interval
value is set in milliseconds. Enter a value
from 20 to 2000.
DTIM Period
The
Delivery Traffic Information Map
(
DTIM
) message is an
element included in some
Beacon
frames. It indicates which
client stations, currently sleeping in low-power mode, have data
buffered on the access point awaiting pickup.
The DTIM period you specify here indicates how often the clients
served by this access point should check for buffered data still
on the AP awaiting pickup.
Specify a DTIM period within the given range (1 - 255).
The measurement is in beacons. For example, if you set this to
“1” clients will check for buffered data on the AP at every beacon.
If you set this to “2”, clients will check on every other beacon. If
you set this to 10, clients will check on every 10th beacon.
Configuring Radio Settings
Field
Description
Configuring Radio Settings
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88
Fragmentation Threshold
Specify a number between 256 and 2,346 to set the
frame size threshold in bytes.
The
fragmentation threshold
is a way of limiting the size
of packets (frames) transmitted over the network. If a
packet exceeds the fragmentation threshold set here,
the fragmentation function will be activated and the
packet will be sent as multiple 802.11 frames.
If the packet being transmitted is equal to or less than
the threshold, fragmentation will not be used.
Setting the threshold to the largest value (2,346 bytes)
effectively disables fragmentation.
Fragmentation involves more overhead both because of
the extra work of dividing up and reassembling of frames
it requires, and because it increases message traffic on
the network. However, fragmentation can help
improve
network performance and reliability if properly configured.
Sending smaller frames (by using lower fragmentation
threshold) may help with some interference problems;
for example, with microwave ovens.
By default, fragmentation is off. We recommend not using
fragmentation unless you suspect radio interference. The
additional headers applied to each fragment increase
the overhead on the network and can greatly reduce
throughput.
RTS Threshold
Specify an
RTS Threshold
value between 0 and 2347.
The RTS threshold specifies the packet size of a request
to send (
RTS
) transmission. This helps control traffic flow
through the access point, especially one with a lot of
clients.
If you specify a low threshold value, RTS packets will be
sent more frequently. This will consume more bandwidth
and reduce the throughput of the packet.
On the other hand, sending more RTS packets can help
the network recover from interference or collisions which
might occur on a busy network, or on a network
experiencing electromagnetic interference.
Maximum Stations
Specify the maximum number of stations allowed to
access this access point at any one time.
You can enter a value between 0 and 2007.
Field
Description
Configuring Radio Settings
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89
Transmit Power
Provide a percentage value to set the transmit power for this
access point.
The default is to have the access point transmit using 100
percent of its power.
Recommendations:
•For most cases, we recommend keeping the default and
having the transmit power set to 100 percent. This is more cost-
efficient as it gives the access point a maximum broadcast
range, and reduces the number of APs needed.
• To increase capacity of the network, place APs closer together
and reduce the value of the transmit power. This will help reduce
overlap and interference among APs. A lower transmit power
setting can also keep your network more secure because
weaker wireless signals are less likely to propagate outside of
the physical location of your network.
Rate Sets
Check the transmission rate sets you want the access point to
support and the basic rate sets you want the access point to
advertise.
Rates are expressed in megabits per second.
Supported Rate Sets
indicate rates that the access
point supports. You can check multiple rates (click a
checkbox to select or deselect a rate). The AP will
automatically choose the most efficient rate based on
factors like error rates and distance of client stations
from the AP.
Basic Rate Sets
indicate rates that the access point
will advertise to the network for the purposes of setting
up communication with other APs and client stations on
the network. It is generally more efficient to have an AP
broadcast a subset of its supported rate sets.
Field
Description
If you are using the two-radio version of the D-Link DWL-2210AP, keep in mind that both Radio
One and Radio Two are configured on this tab. The displayed settings apply to either Radio One
or Radio Two, depending on which radio you choose in the Radio field (first field on tab). When
you have configured settings for one of the radios, click “Update” and then select and configure
the other radio. Be sure to click “Update” to apply the second set of configuration settings for the
other radio.
Updating Settings
To apply your changes, click
Update
.
Configuring Radio Settings
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Controlling Access by MAC Address Filtering
A
Media Access Control
(
MAC
) address is a hardware address that uniquely identifies
each node of a network. All IEEE 802 network devices share a common 48-bit MAC
address format, usually displayed as a string of 12 hexadecimal digits separated by
colons, for example FE:DC:BA:09:87:65.
Each wireless network interface card (
NIC
) used by a wireless client has a unique MAC
address.
You can control client access to your wireless network by switching on “MAC Filtering”
and specifying a list of approved MAC addresses. When MAC Filtering is on, only clients
with a listed MAC address can access the network.
The following sections describe how to use MAC address filtering on the
D-Link DWL-2210AP:
• Navigating to MAC Filtering Settings
• Using MAC Filtering
• Updating Settings

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