D-Link Unified Access System
Software User Manual
02/15/2011
Page 104
Document 34CS3000-SWUM104-D10
Use the buttons at the bottom of the page to perform the following tasks:
•
Click
Delete
to delete the AP’s entry from the Valid AP database.
•
Click
Refresh
to update the screen with the most current information.
•
Click
Submit
to update the switch with the values on the screen. If you want the switch to retain the new values across
a power cycle you must perform a save.
•
Click
Back
to see the Valid AP database summary.
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 and the country in which the APs operate.
In the United States, IEEE 802.11b/802.11g modes (802.11 b/g) support use of channels 1
through 11 inclusive, while IEEE 802.11a mode 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 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.
Power
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.
Table 19: Valid AP Configuration (Cont.)
Field
Description
