Cisco WAP 121 Administration Manual page 39

Radio
Cisco Small Business WAP121 and WAP321 Wireless-N Access Point with PoE
REVIEW DRAFT Version 2—CISCO CONFIDENTIAL
• —The protection feature contains rules to guarantee that 802. 1 1
transmissions do not cause interference with legacy stations or applications.
By default, these protection mechanisms are enabled (Auto). With protection
enabled, protection mechanisms will be invoked if legacy devices are within
range of the AP.
You can disable (Off) these protection mechanisms; however, when
protection is off, legacy clients or APs within range can be affected by
802. 1 1n transmissions. Protection is also available when the mode is
802. 1 1b/g. When protection is enabled in this mode, it protects 802. 1 1b
clients and APs from 802. 1 1g transmissions.
This setting does not affect the ability of the client to associate with
the AP.
• —The interval between the transmission of beacon frames.
The AP transmits these at regular intervals to announce the existence of the
wireless network. The default behavior is to send a beacon frame once
every 100 milliseconds (or 10 per second).
Enter a value from 20 to 2000 milliseconds.
• —The Delivery Traffic Information Map (DTIM period, from 1 to
255 beacons.
The DTIM message is an element included in some Beacon frames. It
indicates which client stations, currently sleeping in low-power mode, have
data buffered on the AP awaiting pick-up.
The DTIM period you specify indicates how often the clients served by this
AP should check for buffered data still on the AP awaiting pickup.
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 10
•
2,346.
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.
th beacon.
—The frame size threshold in bytes, from 256 to
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