Radio configuration 59
The measurement is in beacons. For example, if you set this field to 1, clients will check for
buffered data on the AP at every beacon. If you set this field to 10, clients will check on every
10th beacon.
Fragmentation threshold
Specify a number from 256 to 2,346 to set the frame size threshold in bytes.
The fragmentation threshold is a way of limiting the size of frames transmitted over the network.
If a frame exceeds the fragmentation threshold you set, the fragmentation function is activated
and the frame is sent as multiple 802.11 frames.
If the frame being transmitted is equal to or less than the threshold, fragmentation is not used.
Setting the threshold to the largest value (2,346 bytes) effectively disables fragmentation.
Fragmentation involves more overhead because it requires the extra work of dividing up and
reassembling frames and it increases message traffic on the network. However, fragmentation
can help improve network performance and reliability if properly configured.
Sending smaller frames (by using lower fragmentation threshold) might help with some
interference problems; for example, with microwave ovens.
By default, fragmentation is off. HP recommends 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
Specify a Request to Send (RTS) threshold value from 0 to 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
many clients. If you specify a low threshold value, RTS packets will be sent more frequently. This
will consume more bandwidth and reduce packet throughput on the AP. On the other hand,
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.
Transmit power
Enter a percentage value for the transmit power level for this AP.
The default value, which is 100%, can be more cost-efficient than a lower percentage, since it
gives the AP a maximum broadcast range and reduces the number of APs needed to cover an
area.
To increase the capacity of the network, place APs closer together and reduce the value of the
transmit power. This helps reduce overlap and interference among APs. 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.
Fixed multicast rate
This value sets a fixed transmission rate in Mbps for broadcast and multicast packets. This
setting can be useful in an environment where wireless multicast video streaming occurs,
provided the wireless clients are capable of handling the configured rate.