802.11 Bands
You can configure the 802.11b/g/n (2.4 GHz) and 802.11a/n/ac (5 GHz) bands for the controller to comply with the regulatory requirements in your country. By default, both 802.11b/g/n and 802.11a/n/ac are enabled.
This section contains the following subsections:
Configuring the 802.11 Bands (GUI)
Procedure
Step 1 |
Choose Wireless > 802.11a/n/ac or 802.11b/g/n > Network to open the Global Parameters page. |
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Step 2 |
Select the 802.11a (or 802.11b/g) Network Status check box to enable the 802.11a or 802.11b/g band. To disable the band, unselect the check box. The default value is enabled. You can enable both the 802.11a and 802.11b/g bands. |
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Step 3 |
If you enabled the 802.11b/g band in Step 2, select the 802.11g Support check box if you want to enable 802.11g network support. The default value is enabled. If you disable this feature, the 802.11b band is enabled without 802.11g support. |
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Step 4 |
Specify the period at which the SSID is broadcast by the access point by entering a value between 20 and 1000 milliseconds (inclusive) in the Beacon Period text box. The default and the recommended value is 100 milliseconds.
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Step 5 |
Specify the size at which packets are fragmented by entering a value between 256 and 2346 bytes (inclusive) in the Fragmentation Threshold text box. Enter a low number for areas where communication is poor or where there is a great deal of radio interference. |
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Step 6 |
Make access points advertise their channel and transmit power level in beacons and probe responses for CCX clients. Select the DTPC Support check box. Otherwise, unselect this check box. The default value is enabled. Client devices using dynamic transmit power control (DTPC) receive the channel and power level information from the access points and adjust their settings automatically. For example, a client device used primarily in Japan could rely on DTPC to adjust its channel and power settings automatically when it travels to Italy and joins a network there.
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Step 7 |
Specify the maximum number of allowed clients per radio within this band by entering a value between 1 to 200 in the Maximum Allowed Client box. The default value is 200. |
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Step 8 |
Select or unselect the RSSI Low Check check box to enable or disable the RSSI Low Check feature. |
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Step 9 |
(Optional) If you enabled RSSI Low Check, enter the RSSI Threshold value. The default value is –80 dBm. |
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Step 10 |
Use the Data Rates options to specify the rates at which data can be transmitted between the access point and the client. These data rates are available:
For each data rate, choose one of these options:
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Step 11 |
Click Apply. |
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Step 12 |
Click Save Configuration. |
Configuring the 802.11 Bands (CLI)
Procedure
Step 1 |
Disable the 802.11a band by entering this command: config 802.11a disable network
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Step 2 |
Disable the 802.11b/g band by entering this command: config 802.11b disable network
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Step 3 |
Specify the rate at which the SSID is broadcast by the access point by entering this command: config {802.11a | 802.11b} beaconperiod time_unit where time_unit is the beacon interval in time units (TUs). One TU is 1024 microseconds. You can configure the access point to send a beacon every 20 to 1000 milliseconds. |
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Step 4 |
Specify the size at which packets are fragmented by entering this command: config {802.11a | 802.11b} fragmentation threshold where threshold is a value between 256 and 2346 bytes (inclusive). Specify a low number for areas where communication is poor or where there is a great deal of radio interference. |
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Step 5 |
Make access points advertise their channel and transmit power level in beacons and probe responses by entering this command: config {802.11a | 802.11b } dtpc {enable | disable} The default value is enabled. Client devices using dynamic transmit power control (DTPC) receive the channel and power level information from the access points and adjust their settings automatically. For example, a client device used primarily in Japan could rely on DTPC to adjust its channel and power settings automatically when it travels to Italy and joins a network there.
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Step 6 |
Specify the maximum allowed clients that can be configured by entering this command: config {802.11a | 802.11b} max-clients max_allow_clients The valid range is between 1 to 200. |
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Step 7 |
Configure the RSSI Low Check feature by entering this command: |
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Step 8 |
Configure the RSSI Threshold value by entering this command:
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Step 9 |
Specify the rates at which data can be transmitted between the controller and the client by entering this command: config {802.11a | 802.11b} rate {disabled | mandatory | supported} rate where
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Step 10 |
Enable the 802.11a band by entering this command: config 802.11a enable network The default value is enabled. |
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Step 11 |
Enable the 802.11b band by entering this command: config 802.11b enable network The default value is enabled. |
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Step 12 |
Enable or disable 802.11g network support by entering this command: config 802.11b 11gSupport {enable | disable} The default value is enabled. You can use this command only if the 802.11b band is enabled. If you disable this feature, the 802.11b band is enabled without 802.11g support. |
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Step 13 |
Enter the save config command to save your changes. |
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Step 14 |
View the configuration settings for the 802.11a or 802.11b/g band by entering this command: show {802.11a | 802.11b} Information similar to the following appears:
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