Radio Interface
BreezeMAX Wi² and BreezeACCESS Wi² System Manual 95
that the access point will save all broadcast/multicast frames for the Basic
Service Set (BSS) and forward them after every second beacon. Using smaller
DTIM intervals delivers broadcast/multicast frames in a more timely manner,
causing stations in Power Save mode to wake up more often and drain power
faster. 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: 1 beacon)
Multicast Data Rate – The maximum data rate at which the access point
transmits multicast and broadcast packets on the wireless interface. (Options:
24, 12, 6 Mbps; Default: 6 Mbps)
Fragmentation Length – Configures the minimum packet size that can be
fragmented when passing through the access point. 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 access point 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 access point always sends RTS signals. If set
to 2347, the access point 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 APs 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)
4.6.1.2.2 CLI Commands for the 802.11g Wireless Interface From the global configuration mode, enter the interface wireless g command to
access the 802.11g radio interface. The 802.11g radio can be forced to an
802.11g-only, 802.11b-only, or mixed 802.11b/g operating mode using the
radio-mode command. You should set the desired operating mode before
configuring channel settings (the default is mixed 802.11b/g operation). Select a
radio channel or set selection to Auto using the channel command. Set any