Dell PowerConnect W-Airwave User Manual page 101

3. Locate the Radio Settings area and adjust these settings as required.
default values.
Table 61 Groups > Radio Fields and Default Values
Setting
Allow Automatic Channel Select (2.4,
5 GHz and 4.9GHz)
802.11b Data Rates (Mb/sec)
Frag Threshold Enabled
Threshold Value
RTS/CTS Threshold Enabled
RTS/CTS Threshold Value
RTS/CTS Maximum Retries
Maximum Data Retries
Beacon Period (19-5000 Kμsec)
DTIM Period (1-255)
Ethernet Encapsulation
Radio Preamble
Dell PowerConnect W AirWave 7.1 | User Guide
Default Description
No If enabled, whenever the AP is rebooted it uses its radio to scan the
airspace and automatically select its optimal RF channel based on
observed signal strength from other radios.
NOTE: If you enable this feature, AWMS automatically reboots the APs in
the group when the change is implemented.
Required: Displays pull-down menus for various data rates for transmitting data.
1.0 NOTE: This setting does not apply to Cisco LWAPP devices.

2.0 The three values in each of the pull-down menus are as follows:

Optional: Required—The AP transmits only unicast packets at the specified

data rate; multicast packets are sent at a higher data rate set to
5.5

optional. (Corresponds to a setting of yes on Cisco devices.)
11.0

Optional—The AP transmits both unicast and multicast at the

specified data rate. (Corresponds to a setting of basic on Cisco
devices.)
Not Used—The AP does not transmit data at the specified data rate.

(Corresponds to a setting of no on Cisco devices.)
No If enabled, this setting enables packets to be sent as several pieces
instead of as one block. In most cases, Aruba recommends leaving this
option disabled.
2337 If Fragmentation Threshold is enabled, this specifies the size (in bytes) at
which packets are fragmented. A lower Fragmentation Threshold setting
might be required if there is a great deal of radio interference.
No If enabled, this setting configures the AP to issue a RTS (Request to
Send) before sending a packet. In most cases, Aruba recommends
leaving this option disabled.
2338 If RTS/CTS is enabled, this specifies the size of the packet (in bytes) at
which the AP sends the RTS before sending the packet.
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.
32 The maximum number of attempts the AP makes to send a packet before
giving up and dropping the packet.
100 Time between beacons (in kilo microseconds).
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.
RFC1042 This setting selects either the RFC1042 or 802.1h Ethernet encapsulation
standard for use by the group.
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 61 describes the settings and
Configuring and Using Device Groups in AWMS | 101