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System Configuration
6-60
Using higher DTIM values reduces the power used by stations in
Power Save mode, but delays the transmission of broadcast/
multicast frames.
(Range: 1-255 beacons; Default: 2 beacons)
Fragment Length – Configures the minimum packet size that can
be fragmented when passing through the wireless bridge.
Fragmentation of the PDUs (Package Data Unit) can increase the
reliability of transmissions because it increases the probability of
a successful transmission due to smaller frame size. If there is
significant interference present, or collisions due to high network
utilization, try setting the fragment size to send smaller
fragments. This will speed up the retransmission of smaller
frames. However, it is more efficient to set the fragment size
larger if very little or no interference is present because it requires
overhead to send multiple frames. (Range: 256-2346 bytes;
Default: 2346 bytes)
RTS Threshold – Sets the packet size threshold at which a
Request to Send (RTS) signal must be sent to a receiving station
prior to the sending station starting communications. The
wireless bridge sends RTS frames to a receiving station to
negotiate the sending of a data frame. After receiving an RTS
frame, the station sends a CTS (clear to send) frame to notify the
sending station that it can start sending data.
If the RTS threshold is set to 0, the wireless bridge always sends
RTS signals. If set to 2347, the wireless bridge never sends RTS
signals. If set to any other value, and the packet size equals or
exceeds the RTS threshold, the RTS/CTS (Request to Send /
Clear to Send) mechanism will be enabled.
The wireless bridges contending for the medium may not be
aware of each other. The RTS/CTS mechanism can solve this
“Hidden Node Problem.” (Range: 0-2347 bytes: Default: 2347
bytes)