Configuring Advanced Settings
D-Link Unified Wired and Wireless Access System
Oct. 2015 Page 613
D-Link UWS User Manual
RTS Threshold Specify a Request to Send (RTS) Threshold value between 0 and 2347.
The RTS threshold indicates the number of octets in an MPDU, below which an RTS/
CTS handshake is not performed.
Changing the RTS threshold can help control traffic flow through the AP, 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.
Load Balancing If you enable load balancing, you can control the amount of traffic that is allowed on
the AP.
Load Utilization This field allows you to set a threshold for the percentage of network bandwidth
utilization allowed on the radio. Once the level you specify is reached, the AP stops
accepting new client associations. Enter a percentage of utilization from 1 to 100.
Maximum Clients Specify the maximum number of stations allowed to associate with this access point
at any one time.
You can enter a value between 0 and 200.
RF Scan Other Channels The access point can perform RF scans to collect information about other wireless
devices within range and then report this information to the DWS-4000 Series
switch.
If you select the Scan Other Channels option, the radio periodically moves away from
the operational channel to scan other channels.
Enabling this mode causes the radio to interrupt user traffic, which may be
noticeable with voice connections.
When the Scan Other Channels option is cleared, the AP scans only the operating
channel.
RF Scan Sentry Select this option to allow the radio to operate in sentry mode.
When the RF Scan Sentry option is selected, the radio primarily performs dedicated
RF scanning. The radio passively listens for beacons and traffic exchange between
clients and other access points but does not accept connections from wireless
clients. In sentry mode, all VAPs are disabled. Networks that deploy sentry APs or
radios can detect devices on the network quicker and perform more thorough
security analysis.
In this mode, the radio switches from one channel to the next. The length of time
spent on each channel is controlled by the scan duration. The default scan duration
is 10 milliseconds.
RF Scan Interval This field controls the length of time between channel changes during the RF Scan.
RF Scan Sentry
Channels
The radio can scan channels in the radio frequency used by the 802.11b/g band (2.4
GHz), the 802.11a band (5 GHz), or both bands. Select the channel band for the radio
to scan.
Note: The band selection applies only to radios in sentry mode and is dependent
upon the capabilities of the radio.
RF Scan Duration This field controls the amount of time the radio spends scanning the other channel
(in milliseconds) during an RF scan.
Table 355: Radio Settings (Cont.)
Field Description
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