Dell PowerConnect W-Airwave Configuration Manual page 115

Table 52
Field
Non 802.11
Interference
Immunity
Enable CSA
CSA Count
(1-16)
Management Frame
Throttle Interval
Management Frame
Throttle Limit
ARM/WIDS
Override
Maximum Distance
Spectrum
Monitoring
3. Select Add or Save. The added or edited 802.11a/g profile appears on the Profiles > RF > 802.11a/g page.
Dell PowerConnect W-AirWave 7.5 | Configuration Guide
Profiles > RF > 802.11a/g Profile Settings (Continued)
Default Description
Level 2 When an AP attempts to decode a non-802.11 signal, that attempt can momentarily
interrupt its ability to receive traffic. The noise immunity feature can help improve network
performance in environments with a high level of non-802.11 noise from devices such as
Bluetooth headsets, video monitors and cordless phones.
You can configure the noise immunity feature for any one of the following levels of noise
sensitivity. Note that increasing the level makes the AP slightly 'deaf' to its surroundings,
causing the AP to lose a small amount of range.
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
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You can manage Non-802.11 Noise Immunity settings through the 802.11g RF management
profile. Do not raise the noise immunity feature's default setting if the RX Sensitivity Tuning
Based Channel Reuse feature is also enabled. A level-3 to level-5 Noise Immunity setting is
not compatible with the Channel Reuse feature.
Requires version at or above 3.4.4.3 and < 5.0.0.0, or version 5.0.3.1 or later and earlier than
6.0.0.0, or version 6.0.1.0 and above
No Enable or disable Channel Switch Announcements (CSAs), as defined by IEEE 802.11h. This
setting enables an AP to announce that it is switching to a new channel before it begins
transmitting on that channel. This allows clients that support CSA to transition to the new
channel with minimal downtime.
4 Set the number of channel switch announcements that must be sent prior to switching to a
new channel.
1 Set the averaging interval for rate limiting management frames from this radio, in seconds.
A management frame throttle interval of 0 seconds disables rate limiting.
20 Set the maximum number of management frames that can come in from this radio in each
throttle interval.
No If selected, this option disables Adaptive Radio Management (ARM) and Wireless IDS
functions and slightly increases packet processing performance. If a radio is configured to
operate in Air Monitor mode, then the ARM/WIDS override functions are always enabled,
regardless of whether or not this check box is selected.
0 Maximum client distance, in meters. This value is used to derive ACK and CTS timeout
times. A value of 0 specifies default settings for this parameter, where timeouts are only
modified for outdoor mesh radios which use a distance of 16km.
The upper limit for this parameter varies from 24–58km, depending on the radio's band (a/g)
and 20/40 MHz mode. Note that if you configure a value above the supported maximum, the
maximum supported value will be used instead. Values below 600m will use default
settings.
No Select this option to convert APs using this radio profile to a hybrid APs that will continue
to serve clients as an Access Point, but will also scan and analyze spectrum analysis data
for a single radio channel. Requires a Wireless Intrusion Protection license or an RFprotect
license and a minimum version of 6.1.0.0.
Level 0: no ANI adaptation.
Level 1: Noise immunity only. This level enables power-based packet detection by
controlling the amount of power increase that makes a radio aware that it has received
a packet.
Level 2: Noise and spur immunity. This level also controls the detection of OFDM
packets, and is the default setting for the Noise Immunity feature.
Level 3: Level 2 settings and weak OFDM immunity. This level minimizes false detects
on the radio due to interference, but may also reduce radio sensitivity. This level is
recommended for environments with a high-level of interference related to 2.4GHz
appliances such as cordless phones.
Level 4: Level 3 settings, and FIR immunity. At this level, the AP adjusts its sensitivity to
in-band power, which can improve performance in environments with high and
constant levels of noise interference.
Level 5: The AP completely disables PHY error reporting, improving performance by
eliminating the time the controller would spend on PHY processing.
Configuration Reference | 109