D-Link DWL-8600AP User Manual page 572

D-Link UWS User Manual
Field
Forced Roaming
Roaming Threshold
Channel
Power
D-Link
Oct. 2015
Table 334: Valid AP Configuration (Cont.)
Description
Forced Roaming aims to improve users network experience by forcing a client to
disassociate with the already associated UAP, where the radio signal strength among
the client and the UAP is below the configured threshold. After being forcibly
disassociated with a UAP, the client is ideally going to associate with a nearby UAP
with stronger signal strength thus improving network experience/performance.
When is option is selected, forced roaming is enabled. The factory default is disabled
When the signal strength diminishes below a certain threshold, the client will
disassociate with the access point and re-associate with a nearby access point that
offers a stronger signal.
The scale of the signal strength is as follows: -40dBm is considered 100%, while -
90dBm is considered 0%. The valid range is 20(%) to 50(%). The factory default is
20(%)
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 and the country in which the APs
operate.
In the United States, IEEE 802.11b, 802.11g, and 2.4 GHz 802.11n modes (802.11 b/
g/n) support the use of channels 1 through 11 inclusive, while IEEE 802.11a and 5-
GHz 802.11n modes supports a larger set of non-consecutive channels (36,40,44, 48,
52, 56, 60, 64, 149, 153, 157, 161, 165).
Interference can occur when multiple access points within range of each other are
broadcasting on the same or overlapping channels. The impact of this interference
on network performance can intensify during busy times when a large amount of
data and media traffic is competing for bandwidth.
If you select auto, the AP scans the RF area for occupied channels and selects a
channel from the available non-interfering, or clear channels. The AP selects the best
channel whenever its radio or radios restart.
If you specify a channel, make sure that the channel does not interfere with the
channel that neighbor APs use.
Note: The channel you set for an AP in the valid AP database is fixed and takes
precedence over initial channel selection done by the AP and any automatic channel
planning done by the switch.
Note: For radios that use 802.11a and/or 5-GHz 802.11n mode, some countries have
a regulatory domain that requires radar detection. For these countries (based on the
country code setting), the radio automatically uses the 802.11h protocol for
selecting the channel if radar is detected on the statically assigned channel.
The power level affects how far an AP broadcasts its RF signal. If the power level is
too low, wireless clients will not detect the signal or experience poor WLAN
performance. If the power level is too high, the RF signal might interfere with other
APs within range.
The default value of 0 indicates that the AP uses the power level set in the AP profile.
Note: The power level you set for an AP in the valid AP database is fixed and takes
precedence over any automatic power adjustments done by the AP or the switch.
Unified Wired and Wireless Access System
Basic Setup
Page 572