Cisco WAP371 Administration Manual page 66

Wireless
Radio
Cisco Small Business WAP371 Wireless Access Point Administration Guide
Aggregated 802.11n or 802.11ac frames (AMPDUs) cannot be fragmented.
Fragmentation is applicable only for legacy radio modes, 802.11a or 802.11b/g.
By default, fragmentation is off. We recommend not using fragmentation unless you
suspect radio interference. The additional headers applied to each fragment increase the
overhead on the network and can greatly reduce throughput.
• RTS Threshold—The Request to Send (RTS) Threshold value. The valid integer range
must be from 0 to 2347. The default is 2347 octets.
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 WAP device,
especially one with a lot of clients. If you specify a low threshold value, RTS packets
are sent more frequently, which consumes more bandwidth and reduces the throughput
of the packet. However, sending more RTS packets can help the network recover from
interference or collisions that might occur on a busy network, or on a network
experiencing electromagnetic interference.
RTS threshold is used only for legacy 802.11 data frames (i.e. not for 802.11n or
802.11ac). In the case of 802.11n and 802.11ac, AMPDU transmissions are protected
by an RTS/CTS exchange, regardless of the frame lengths.
• Maximum Associated Clients—The maximum number of stations allowed to access
each radio of this WAP device at any one time. You can enter an integer between 0 and
200. The default is 200 stations. The dual-radio WAP371 device can support up to 400
clients total.
• Transmit Power—A percentage value for the transmit power level for this WAP device.
The default value of 100 percent can be more cost-efficient than a lower percentage
because it gives the WAP device a maximum broadcast range and reduces the number
of access points needed.
To increase the capacity of the network, place WAP devices closer together and reduce
the value of the transmit power. This helps reduce overlap and interference among
access points. A lower transmit power setting can also keep your network more secure
because weaker wireless signals are less likely to propagate outside of the physical
location of your network.
Some channel ranges and country code combinations have relatively low maximum
transmit power. When attempting to set the transmit power to the lower ranges (for
example, 25% or 12%), the expected drop in power may not occur, because certain
power amplifiers have minimum transmit power requirements.
5
62