Users Guide

Dell PowerConnect W-AirWave 7.5 | User Guide Configuring and Using Device Groups | 87
4. Certain wireless access points offer proprietary settings or advanced functionality that differ from prevailing
industry standards. If you use these APs in the device group, you may wish to take advantage of this
proprietary functionality.
To configure these settings, locate the proprietary settings areas on the Groups > Radio page and continue
with the additional steps in this procedure.
5. To configure settings specific to the Proxim AP-600, AP-700, AP-2000, AP-4000; Avaya AP-3/4/5/6//7/8, and
ProCurve 520WL, locate the appropriate section of Groups > Radio page and define the required fields.
Table 65 describes the settings and default values.
RTS/CTS Maximum
Retries (1-255)
32 If RTS/CTS is enabled, this specifies the maximum number of times the AP issues an
RTS before stopping the attempt to send the packet through the radio.
Acceptable values range from 1 to 128.
Maximum Data Retries (1-
255)
32 The maximum number of attempts the AP makes to send a packet before giving up
and dropping the packet. Acceptable values range from 1 to 255.
Beacon Period (19-5000
msec)
100 Time between beacons (in microseconds).
DTIM Period (1-255) 2 DTIM alerts power-save devices that a packet is waiting for them. This setting
configures DTIM packet frequency as a multiple of the number of beacon packets.
The DTIM Interval indicates how many beacons equal one cycle.
Ethernet Encapsulation RFC1042 This setting selects either the RFC1042 or 802.1h Ethernet encapsulation standard for
use by the group.
Radio Preamble Long This setting determines whether the APs uses a short or long preamble. The
preamble is generated by the AP and attached to the packet prior to transmission.
The short preamble is 50 percent shorter than the long preamble and thus may
improve wireless network performance.
NOTE: Because older WLAN hardware may not support the “short” preamble, the
“long” preamble is recommended as a default setting in most environments.
Table 64 Groups > Radio > Radio Settings Fields and Default Values (Continued)
Setting Default Description
NOTE: Proprietary settings are only applied to devices in the group from the specific vendor and are not configured on devices
from vendors that do not support the functionality.
Table 65 Groups > Radio > Proxim AP-600, AP-700, AP-2000, AP-4000; Avaya AP-3, Avaya AP-7, AP-4/5/6, AP-8;
ProCurve520WL Fields and Default Values
Setting Default Description
Load Balancing No If enabled, this setting allows client devices associating to an AP with two radio cards
to determine which card to associate with, based on the load (# of clients) on each
card.
NOTE: This feature is only available when two 802.11b wireless cards are used in an
AP-2000.
Interference Robustness No If enabled, this option will fragment packets greater than 500 bytes in size to reduce
the impact of radio frequency interference on wireless data throughput.
Distance Between APs Large This setting adjusts the receiver sensitivity. Reducing receiver sensitivity from its
maximum may help reduce the amount of crosstalk between wireless stations to
better support roaming users. Reducing the receiver sensitivity, user stations will be
more likely to connect with the nearest access point.
802.11g Operational
Mode
802.11b
+802.11g
This setting sets the operational mode of all g radios in the group to either b only, g
only orb+g.