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Configuring Radio Settings for an IAP

You can configure 2.4 GHz and 5 GHz radio settings for an IAP either using Instant UI or CLI.

In the Instant UI

To configure radio settings:

1. Click the RF link at the top right corner of the Instant main window.
2. Click Show advanced options. The advanced options are displayed.
3. Click the Radio tab.
4. Under the channel 2.4.GHz or 5GHz or both, configure the following parameters.

Table 1: Radio Configuration Parameters

Parameter

Description

Legacy only

Select Enabled to run the radio in non-802.11n mode. This option is set to Disabled by default.

802.11d / 802.11h

Select Enabled to allow the radio to advertise its 802.11d (Country Information) and 802.11h (Transmit Power Control) capabilities. This option is set to Disabled by default.

Beacon interval

Enter the Beacon period for the IAP in milliseconds. This indicates how often the 802.11 beacon management frames are transmitted by the access point. You can specify a value within the range of 60-500. The default value is 100 milliseconds.

Interference immunity level

Select to increase the immunity level to improve performance in high-interference environments.

The default immunity level is 2.

l Level 0— no ANI adaptation.
l 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.
l 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.
l 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 2.4 GHz appliances such as cordless phones.
l 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.
l Level 5— The AP completely disables PHY error reporting, improving performance by eliminating the time the IAP would spend on PHY processing.

NOTE: Increasing the immunity level makes the AP to lose a small amount of range.

Channel switch announcement count

Specify the count to indicate the number of channel switching announcements that must be sent before switching to a new channel. This allows associated clients to recover gracefully from a channel change.

Background spectrum monitoring

Select Enabled to allow the APs in access mode to continue with normal access service to clients, while performing additional function of monitoring RF interference (from both neighboring APs and non Wi-Fi sources such as, microwaves and cordless phones) on the channel they are currently serving clients.

5. Reboot the IAP after configuring the radio profile settings.

In the CLI

To configure 2.4 GHz radio settings:

(Instant Access Point)(config)# rf dot11g-radio-profile

(Instant Access Point)(RF dot11 g Radio Profile)# beacon-interval <milliseconds>

(Instant Access Point)(RF dot11 g Radio Profile)# legacy-mode

(Instant Access Point)(RF dot11 g Radio Profile)# spectrum-monitor

(Instant Access Point)(RF dot11 g Radio Profile)# dot11h

(Instant Access Point)(RF dot11 g Radio Profile)# interference-immunity <level>

(Instant Access Point)(RF dot11 g Radio Profile)# csa-count <count>

(Instant Access Point)(RF dot11 g Radio Profile)# max-distance <count>

(Instant Access Point)(RF dot11 g Radio Profile)# end

(Instant Access Point)# commit apply

 

To configure 5 GHz radio settings:

(Instant Access Point)(config)# rf dot11a-radio-profile

(Instant Access Point)(RF dot11a Radio Profile)# beacon-interval <milliseconds>

(Instant Access Point)(RF dot11a Radio Profile)# legacy-mode

(Instant Access Point)(RF dot11a Radio Profile)# spectrum-monitor

(Instant Access Point)(RF dot11a Radio Profile)# spectrum-band <type>

(Instant Access Point)(RF dot11a Radio Profile)# dot11h

(Instant Access Point)(RF dot11a Radio Profile)# interference-immunity <level>

(Instant Access Point)(RF dot11a Radio Profile)# max-distance <count>

(Instant Access Point)(RF dot11a Radio Profile)# csa-count <count>

(Instant Access Point)(RF dot11 g Radio Profile)# end

(Instant Access Point)# commit apply

 

To view the radio configuration:

(Instant Access Point)# show radio config

 

Legacy Mode:enable

Beacon Interval:100

802.11d/802.11h:enable

Interference Immunity Level:2

Channel Switch Announcement Count:0

MAX Distance:600

Channel Reuse Type:disable

Channel Reuse Threshold:0

Background Spectrum Monitor:disable

 

5.0 GHz:

Legacy Mode:enable

Beacon Interval:100

802.11d/802.11h:enable

Interference Immunity Level:2

Channel Switch Announcement Count:2

MAX Distance:600

Channel Reuse Type:disable

Channel Reuse Threshold:0

Background Spectrum Monitor:disable

Standalone Spectrum Band:5ghz-upper