Cisco AP541N-A-K9 Administration Manual page 90

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Table 19 Advanced Settings Field Descriptions
Field Description
Specify a number between 256 and 2,346 to set the frame
Fragmentation
Threshold size threshold in bytes. The fragmentation threshold must be
set to an even number within the range.
The fragmentation threshold is a way of limiting the size of
packets (frames) transmitted over the network. If a packet
exceeds the fragmentation threshold you set, the
fragmentation function is activated and the packet is sent as
multiple 802. 1 1 frames.
If the packet being transmitted is equal to or less than the
threshold, fragmentation is not used.
Setting the threshold to the largest value (2346 bytes)
effectively disables fragmentation. Fragmentation plays no
role when Aggregation is enabled.
Fragmentation involves more overhead both because of the
extra work of dividing up and reassembling of frames it
requires, and because 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. We recommend not using
fragmentation unless you suspect that there is wireless radio
interference. The additional headers applied to each
fragment increase the overhead on the network and can
greatly reduce throughput.
Cisco AP 541N Dual-band Single-radio Access Point Quick Start Guide
Wireless
Modifying Advanced Settings