802.11 parameters and Band Selection

Band select

Band selection is a WLAN feature that

  • enables dual-band client radios to connect to less congested 5-GHz APs

  • improves overall network performance by reducing interference experienced on the controller, and

  • uses probe response regulation to make 5-GHz channels more attractive to clients by delaying probe responses to clients on 2.4-GHz channels.

The 2.4-GHz band is often congested. Clients using the 2.4-GHz band often experience interference from Bluetooth devices, microwave ovens, cordless phones, and other access points. The 802.11b/g limit of three nonoverlapping channels also causes co-channel interference.

Band select works by regulating probe responses to clients and can be enabled on a per-WLAN basis. To view the band select table on an AP, run the show dot11 band-select command. It can also be viewed by running the show cont d0/d1 | begin Lru command.

You can enable both band selection and aggressive load balancing on the controller. They run independently and do not impact one another.

Band Select Algorithm

The band select algorithm affects clients that use 2.4-GHz band. When a client sends a probe request to an access point, the client’s probe Active and Count values become one as seen in the band select table. The algorithm functions based on the following scenarios:


  • Scenario 1: The client RSSI (as seen from the show cont d0/d1 | begin RSSIcommand output) is greater than both Mid RSSI and Acceptable Client RSSI.

    1. For dual-band clients, the access point does not send 2.4-GHz probe responses but sends 5-GHz probe responses for all 5-GHz probe requests.

    2. For single-band (2.4-GHz) clients, the access point sends 2.4-GHz probe responses only after the probe suppression cycle.

    3. When the client’s probe count matches the configured probe cycle count, the algorithm waits for the Age Out Suppression time, marks the client probe’s Active value as zero, and restarts.

  • Scenario 2: Client RSSI (as seen from show cont d0/d1 | begin RSSI) lies between Mid-RSSI and Acceptable Client RSSI.

    1. All 2.4-GHz and 5-GHz probe requests are responded to without any restrictions.

    2. This scenario is similar to when band select is disabled.

      Note: The client RSSI value (from the sh cont d0 | begin RSSI command output) averages all client packets received. The Mid RSSI feature reports the instantaneous RSSI value of probe packets. Therefore, the client RSSI often appears weaker than the configured Mid RSSI value (by 7 dB). The 802.11b probes from the client are suppressed to push the client to associate with the 802.11a band.

802.11 bands

Configure the 802.11b/g/n (2.4 GHz) and 802.11a/n (5 GHz) on the controller to meet your country’s regulatory requirements. By default, both 802.11b/g/n and 802.11a/n are enabled.

  • 802.11n Parameters

  • 802.11h Parameters

802.11n Parameters

This section provides instructions for managing 802.11n APs on your network. The 802.11n devices support the 2.4 and 5-GHz bands and offer high throughput data rates.

The 802.11n high throughput rates are available on all the 802.11n APs for the WLANs using WMM with no Layer 2 encryption or with WPA2/AES encryption enabled.


Note

If you want to disable MCS rates for 802.11n, 802.11ac, or 802.11ax, make sure at least one MCS rate remains enabled. To use only legacy 802.11a/b/g rates on your APs, first disable 802.11ax and 802.11ac on the controller for the specific band, then disable 802.11n. When you disable 802.11n globally on the controller, it affects all APs, even those mapped to a Custom RF Profile.

802.11h Parameters

802.11h informs client devices about channel changes and can limit the transmit power for those devices.

Restrictions for band selection, 802.11 bands, and parameters

  • Band selection-enabled WLANs do not support time-sensitive applications, such as voice and video, because roaming delays impact performance.

  • Band selection is supported only on Cisco Wave 2 and 802.11ax APs.

    For more specific APs, see https://www.cisco.com/c/en/us/td/docs/wireless/access_point/feature-matrix/ap-feature-matrix.html .

  • Band selection works only when your AP is connected to a controller. If you use a FlexConnect AP without a controller connection, it does not perform band selection after a reboot.

  • Dual-band clients are directed from the 2.4-GHz radio to the 5-GHz radio of the same AP, but only when both radios are operational.

  • To enable or disable band selection and client load balancing, configure these features for a specific WLAN. These settings are enabled globally by default, and you cannot change them globally through the controller GUI or CLI.

Configure band selection (GUI)

Before you begin

Ensure that you have configured an AP Join profile prior to configuring the primary and backup controllers.

Optimize wireless client performance by controlling band selection settings on the controller using GUI.

Procedure

Step 1

Choose Configuration > Wireless Advanced > Band Select.

Step 2

In the Cycle Count field, enter a value between one and 10. The cycle count sets the number of suppression cycles for a new client. The default cycle count is two.

Step 3

In the Cycle Threshold (milliseconds) field, enter a value between one and 1000 milliseconds for the scan cycle period threshold. This setting determines the time threshold during which new probe requests from a client come from a new scanning cycle. The default cycle threshold is 200 milliseconds.

Step 4

In the Age Out Suppression (seconds) field, enter a value between 10 and 200 seconds. Age-out suppression sets the expiration time for pruning previously known 802.11b/g/n clients. The default value is 20 seconds. After this time elapses, clients become new and are subject to probe response suppression.

Step 5

In the Age Out Dual Band (seconds) field, enter a value between 10 and 300 seconds. The age-out period sets the expiration time for pruning previously known dual-band clients. The default value is 50 seconds. After this time elapses, clients become new and are subject to probe response suppression.

Step 6

In the Client RSSI (dbm) field, enter a value between -90 to -20. This is the average of the client packets received.

Step 7

In the Client Mid RSSI (dbm) field, enter a value between -90 to -20. This is the instantaneous RSSI value of the probe packets.

Step 8

On the AP Join Profile page, click the AP Join Profile name.

Step 9

Click Apply.

Configure band selection (CLI)

Enable and fine-tune band selection parameters for wireless clients to optimize network performance using commands.

Procedure

Step 1

Enter the global configuration mode.

Example:

Device# configure terminal

Step 2

Set the probe cycle count for band select.

Example:

Device(config)# wireless client band-select cycle-count 3

The valid range is between one and 10.

Step 3

Set the time threshold for a new scanning cycle period.

Example:

Device(config)# wireless client band-select cycle-threshold 5000

The valid range is between one and 1000.

Step 4

Set the suppression expire to the band select.

Example:

Device(config)# wireless client band-select expire suppression 100

The valid range is between 10 and 200.

Step 5

Set the dual band expire.

Example:

Device(config)# wireless client band-select expire dual-band 100

The valid range is between 10 and 300.

Step 6

Set the client RSSI threshold.

Example:

Device(config)# wireless client band-select client-rssi 40

The valid range is between 20 and 90.

Step 7

Configure band selection on specific WLANs.

Example:

Device(config)# wlan wlan1 25 ssid12
Device(config-wlan)# band-select

The valid range is between one and 512. You can specify a value for the SSID_network_name parameter using up to 32 alphanumeric characters.

Configure the 802.11 bands (GUI)

Modify wireless radio settings to optimize network performance for 2.4 GHz and 5 GHz bands using commands.

Procedure

Step 1

Choose Configuration > Radio Configurations > Network.

Step 2

Click on either 5 GHz Band or 2.4 GHz Band. Uncheck the Network Status check box to disable the network. This allows configuration of the network parameters.

Step 3

In the Beacon Interval field, enter the rate at which the SSID is broadcast by the APs, from 100 to 600 milliseconds. The default is 100 milliseconds. For 802.11b/g/n (2.4-GHz) radios, to enable short preamble on the radio, check the Short Preamble check box. A short preamble improves throughput performance.

Step 4

In the Fragmentation Threshold (in bytes) field, enter a value between 256 to 2346 bytes. Packets larger than the size you specify here will be fragmented.

Step 5

Check the DTPC Support check box to advertise the transmit power level of the radio in the beacons and the probe responses. Client devices using dynamic transmit power control (DTPC) receive channel and power level information from APs. They then 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, the settings are updated as needed. If the DTPC Support check box is checked, you cannot configure a power constraint value on your 802.11a/n/ac (5-GHz) radio network. Click Apply.

Step 6

In the CCX Location Measurement section, check the Mode check box to globally enable CCX radio management for the network. Once enabled, APs connected to this device issue broadcast radio measurement requests to clients running CCX v2 or later releases.

Step 7

In the Interval field, enter a value to specify how often the APs must issue broadcast radio measurement requests. Click Apply.

Step 8

In the Data Rates section, choose a value to specify the rates at which data can be transmitted between the AP and the client:

  • Mandatory: Clients must support this data rate to associate with an AP on the controllerembedded wireless controller.
  • Supported: Any associated client supporting this data rate may communicate with the AP using that rate.
  • Disabled: Clients specify the data rates used for communication.

Step 9

Click Apply and save the configuration.

Configure the 802.11 bands (CLI)

Configure the various 802.11 wireless bands and essential parameters using commands.

Follow the procedure given below to configure 802.11 bands and parameters:

Procedure

Step 1

Disable the 802.11a and 802.11b bands.

Example:

Device(config)# ap dot11 5ghz shutdown
Device(config)# ap dot11 24ghz shutdown

Note

 

You must disable the 802.11a band before configuring the 802.11a network parameters.

You must disable the 802.11b band before configuring the 802.11b network parameters.

Step 2

Disable the 802.11 6-GHz band.

Example:

Device(config)# ap dot11 6ghz shutdown

Note

 

You must disable the 802.11 6-GHz band before configuring the 802.11 6-GHz network parameters.

Step 3

Specify the rate at which the SSID is broadcast by the corresponding AP and the size at which packets are fragmented.

Example:

Device(config)# ap dot11 {5ghz | 24ghz | 6ghz} beaconperiod 500
Device(config)# ap dot11 {5ghz | 24ghz | 6ghz} fragmentation 300

The beacon interval is measured in time units (TUs). One TU is 1024 microseconds. You can configure the AP to send a beacon every 20 to 1000 milliseconds.

The 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.

Step 4

Enable APs to advertise their channels and transmit the power levels in beacons and probe responses.

Example:

Device(config)# ap dot11 {5ghz | 24ghz | 6ghz} dtpc
Device(config)# no ap dot11 {5ghz | 24ghz | 6ghz} dtpc

The default value is enabled. Client devices using dynamic transmit power control (DTPC) receive the channel-level and power-level information from the APs and adjust their settings automatically. For example, a client device used primarily in Japan can rely on DTPC to adjust its channel and power settings automatically when it travels to Italy and joins a network there.

The no form of the command disables the DTPC setting.

Step 5

Specify the maximum allowed number of clients that can be configured.

Example:

Device(config)# wireless client association limit number 50 interval milliseconds 1000

You can configure the maximum number of association requests on a single access point slot at a given interval. The range of association limit that you can configure is from one to 100.

The association request limit interval is measured between 100 to 10000 milliseconds.

Step 6

Specify the rate at which data can be transmitted between the controllerembedded wireless controller and the client.

Example:

Device(config)# ap dot11 {5ghz | 24ghz} rate 36 {disable | mandatory | supported}

  • disable: Defines that the clients specify the data rates used for communication.

  • mandatory: Defines that the clients support this data rate in order to associate to an AP on the controllerembedded wireless controller.

  • supported: Any associated clients that support this data rate can communicate with the AP using that rate. However, the clients are not required to use this rate in order to associate.

  • rate: Specifies the rate at which data is transmitted. For the 802.11a and 802.11b bands, the data is transmitted at the rate of one, two, 5.5, six, nine, 11, 12, 18, 24, 36, 48, or 54 Mbps.

Step 7

Enable the 802.11a and 802.11b bands.

Example:

Device(config)# no ap dot11 5ghz shutdown
Device(config)# no ap dot11 24ghz shutdown

Note

 

The default value is enabled.

Step 8

Enable the 802.11 6-GHz band.

Example:

Device(config)# no ap dot11 6ghz shutdown

Note

 

The default value is enabled.

Step 9

Enable or disable 802.11g network support. Then return to privileged EXEC mode.

Example:

Device(config)# ap dot11 24ghz dot11g
Device(config)# end

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.

Configure a band-select RF profile (GUI)

Configure specific parameters in a band-select RF profile to optimize client band steering behavior on your wireless network.

Procedure

Step 1

Choose Configuration > Wireless > Advanced.

Step 2

In the Band Select tab, enter a value between one and 10 in the Cycle Count field. The cycle count determines how many suppression cycles are applied to each new client. The default cycle count is two.

Step 3

In the Cycle Threshold field, enter a value between one and 1000 milliseconds to define the scan cycle period threshold. his setting specifies the time period in which probe requests from a client are recognized as part of a new scanning cycle. The default cycle threshold value is 200 milliseconds.

Step 4

In the Age Out Suppression field, enter a value between 10 and 200 seconds. Age-out suppression establishes the expiration time for removing records of previously known 802.11b/g/n clients. The default value is 20 seconds. After the expiration time, clients are treated as new and become subject to probe response suppression.

Step 5

In the Age Out Dual Band field, enter a value between 10 and 300 seconds. The age-out period establishes the expiration time for removing records of previously known dual-band clients. The default value is 50 seconds. After the expiration period, clients are considered new and are subject to probe response suppression.

Step 6

In the Client RSSI field, enter a value between -90 dBm and -20 dBm. This value sets the minimum RSSI required for a client to respond to a probe.

Step 7

In the Client Mid RSSI field, enter a value between –20 dBm and –90 dBm. This parameter defines the mid-RSSI value, which can be used to toggle 2.4 GHz probe suppression depending on the RSSI.

Step 8

Click Apply.

Configure a band-select RF profile (CLI)

Customize how band selection operates on 2.4 GHz radios by defining parameters in an RF profile using commands.

Procedure

Step 1

Enter the global configuration mode.

Example:

Device# configure terminal

Step 2

Configure the RF profile name and enter the RF profile configuration mode.

Example:

Device(config)# ap dot11 24ghz rf-profile test1

Step 3

Set the band-select client threshold.

Example:

Device(config-rf-profile)# band-select client {mid-rssi | rssi} -90

Step 4

Set the band-select cycle parameters.

Example:

Device(config-rf-profile)# band-select cycle {count | threshold} 10

Step 5

Configure the RF profile's band-select expiry time.

Example:

Device(config-rf-profile)# band-select expire {dual-band | suppression} 100

Step 6

Enable the RF profile's band-select probe response.

Example:

Device(config-rf-profile)# band-select probe-response

Configure 802.11n parameters (GUI)

Apply custom 802.11n wireless settings to an RF profile in the device management GUI.

Procedure

Step 1

Choose Configuration > Tags & Profiles > RF.

Step 2

Click Add to view the Add RF Profile window.

Step 3

In the 802.11 tab, complete these steps:

  1. Choose the required operational rates.

  2. Select the required 802.11n MCS Rates by checking the corresponding check boxes.

Step 4

Click Save & Apply to Device.

Configure 802.11n parameters (CLI)

Configure and optimize 802.11n settings on a wireless AP using commands.

Procedure

Step 1

Enable 802.11n support on the network.

Example:

Device(config)# ap dot11 {5ghz | 24ghz} dot11n

The no form of this command disables the 802.11n support on the network.

Step 2

Specify the modulation and coding scheme (MCS) rates for data transmission between the access point and the client.

Example:

Device(config)# ap dot11 {5ghz | 24ghz} dot11n mcs tx 20

rtu: The valid range is zero to 23.

The no form of this command disables the MCS rates that are configured.

Step 3

Enable WMM on the WLAN and uses the 802.11n data rates that you configured.

Example:

Device(config)# wlan wlan1 25 ssid12
Device(config-wlan)# wmm require

The require keyword requires client devices to use WMM. Devices that do not support WMM cannot join the WLAN.

Step 4

Disable the network.

Example:

Device(config)# ap dot11 {5ghz | 24ghz} shutdown

Step 5

Specify the aggregation method used for 802.11n packets.

Example:

Device(config)# {ap | no ap} dot11 {5ghz | 24ghz} dot11n a-mpdu tx priority {all | 0-7}

Aggregation is the process of grouping packet data frames together, rather than transmitting them separately. Two aggregation methods are available: Aggregated MAC Protocol Data Unit (A-MPDU) and Aggregated MAC Service Data Unit (A-MSDU). Both A-MPDU and A-MSDU are performed in the software.

You can specify the aggregation method for various types of traffic from the access point to the clients.

The list defines the priority levels (zero-7) assigned per traffic type.

  • Zero—Best effort

  • One—Background

  • Two—Spare

  • Three—Excellent effort

  • Four—Controlled load

  • Five—Video, less than 100-ms latency and jitter

  • Six—Voice, less than 100-ms latency and jitter

  • Seven—Network control

You can configure each priority level independently or use all the parameters to configure every priority level simultaneously. You can configure priority levels so that the traffic uses either A-MPDU transmission or A-MSDU transmission.

  • When you use the ap command with other options, traffic at that priority level uses A-MPDU transmission.

  • When you use the no ap command along with the other options, the traffic associated with that priority level uses A-MSDU transmission.

    Configure the priority levels to match the aggregation method used by the clients. By default, both A-MPDU and A-MSDU are enabled for priority levels zero to five; all other levels are disabled.

Note

 

Tracking the TX retries value by internal MSDUs instead of the whole PPDU in Cisco IOS XE 17.12 and later versions provides a more accurate count for the AP’s retries. This adjustment has led to a notable increase in retry count values because multiple MSDUs are contained within a single PPDU. This change is intentional and will be implemented in all future versions of Cisco IOS XE.

Step 6

Re-enable the network.

Example:

Device(config)# no ap dot11 {5ghz | 24ghz} shutdown

Step 7

Configure the guard interval for the network.

Example:

Device(config)# ap dot11 {5ghz | 24ghz} dot11n guard-interval {any | long}

Step 8

Configure the Reduced Interframe Space (RIFS) for the network.

Example:

Device(config)# ap dot11 {5ghz | 24ghz} dot11n rifs rx

Step 9

Return to privileged EXEC mode. Alternatively, press Ctrl-Z to exit global configuration mode.

Example:

Device(config)# end

Configure 802.11h parameters (CLI)

Configure 802.11h parameters on a wireless AP using commands to manage compliance, interference, and transmit power settings.

Procedure

Step 1

Disable the 802.11 network.

Example:

Device(config)# ap dot11 5ghz shutdown

Step 2

Disable the 802.11 6-GHz network.

Example:

Device(config)# ap dot11 6ghz shutdown

Step 3

Enable or disable the AP to announce when it is switching to a new channel.

Example:

Device(config)# {ap | no ap} dot11 5ghz channelswitch mode 0

switch_mode: Enter zero or one to specify whether transmissions are restricted until the actual channel switch ( zero ) or are not restricted ( one ). The default value is disabled.

Step 4

Enable or disable the AP to announce when it is switching to a new channel in quiet mode.

Example:

Device(config)# ap dot11 5ghz channelswitch quiet
Device(config)# no ap dot11 6ghz channelswitch quiet

Step 5

Configure the 802.11h power constraint value in dB.

Example:

Device(config)# ap dot11 5ghz power-constraint 200

The valid range is from zero to 255. The default value is three.

Step 6

Configure the 802.11 6-GHz power constraint value in dB.

Example:

Device(config)# ap dot11 5ghz power-constraint 200

The valid range is from zero to 30. The default value is three.

Step 7

Re-enable the 802.11a network.

Example:

Device(config)# no ap dot11 5ghz shutdown

Step 8

Re-enable the 802.11 6-GHz network.

Example:

Device(config)# no ap dot11 6ghz shutdown

Step 9

Return to privileged EXEC mode.

Example:

Device(config)# end

Verify configuration settings using band selection and 802.11 bands commands

Use these commands to verify band selection, 802.11 bands, and parameters on the device.

Table 1. Monitoring configuration settings using band selection and 802.11 band commands
Command Purpose
show ap dot11 5ghz network

Displays 802.11a band network parameters, 802.11a operational rates, 802.11n MCS settings, and 802.11n status information.
show ap dot11 24ghz network

Displays 802.11b band network parameters, 802.11b/g operational rates, 802.11n MCS settings, and 802.11n status information.
show ap dot11 6ghz network

Displays 802.116-GHz band network parameters, 802.11b/g operational rates, 802.11n MCS settings, and 802.11n status information.
show wireless dot11h

Displays 802.11h configuration parameters.
show wireless band-select

Displays band-select configuration settings.

Example: view the configuration settings for the 6-GHz band

Device# show ap dot11 6ghz network
                    
802.11 6Ghz Network                       : Enabled
802.11 6Ghz Status:
  A-MPDU Tx:
    Priority 0                            : Enabled
    Priority 1                            : Enabled
    Priority 2                            : Enabled
    Priority 3                            : Enabled
    Priority 4                            : Enabled
    Priority 5                            : Enabled
    Priority 6                            : Disabled
    Priority 7                            : Disabled
  A-MSDU Tx:
    Priority 0                            : Enable
    Priority 1                            : Enable
    Priority 2                            : Enable
    Priority 3                            : Enable
    Priority 4                            : Enable
    Priority 5                            : Enable
    Priority 6                            : Disable
    Priority 7                            : Disable
802.11ax                                  : Enabled
  DynamicFrag                             : Enabled
  MultiBssid                              : Disabled
  Target Wakeup Time                      : Enabled
  Target Wakeup Time Broadcast            : Enabled
  BSS Color                               : Disabled
  OBSS PD                                 : Disabled
  Non-SRG OBSS PD Maximum Threshold       : -62 dBm 
  SRG OBSS PD                             : Disabled
  SRG OBSS PD Minimum Threshold           : -82 dBm 
  SRG OBSS PD Maximum Threshold           : -62 dBm 
802.11ax MCS Settings:
  MCS  7, Spatial Streams = 1             : Supported
  MCS  9, Spatial Streams = 1             : Disabled
  MCS 11, Spatial Streams = 1             : Supported
  MCS  7, Spatial Streams = 2             : Supported
  MCS  9, Spatial Streams = 2             : Disabled
  MCS 11, Spatial Streams = 2             : Supported
  MCS  7, Spatial Streams = 3             : Supported
  MCS  9, Spatial Streams = 3             : Disabled
  MCS 11, Spatial Streams = 3             : Supported
  MCS  7, Spatial Streams = 4             : Supported
  MCS  9, Spatial Streams = 4             : Disabled
  MCS 11, Spatial Streams = 4             : Supported
Beacon Interval                           : 95
CF Pollable mandatory                     : Disabled
CF Poll Request Mandatory                 : Disabled
CFP Period                                : 4
CFP Maximum Duration                      : 60
Default Channel                           : 1
Default Tx Power Level                    : 1
DTPC Status                               : Enabled
Fragmentation Threshold                   : 2335
RSSI Low Check	                          : Disabled
RSSI Threshold                            : -127 dbm
TI Threshold                              : 
Legacy Tx Beamforming setting             : Disabled
Traffic Stream Metrics Status             : Disabled
Expedited BW Request Status               : Disabled
EDCA profile type check                   : default-wmm
Client Load Based EDCA Config             : Enabled
Call Admision Control (CAC) configuration
Voice AC
  Voice AC - Admission control (ACM)      : Disabled
  Voice Stream-Size                       : 84000
  Voice Max-Streams                       : 2
  Voice Max RF Bandwidth                  : 75
  Voice Reserved Roaming Bandwidth        : 6
  Voice Load-Based CAC mode               : Enabled
  Voice tspec inactivity timeout          : Enabled
CAC SIP-Voice configuration
  SIP based CAC                           : Disabled
  SIP call bandwidth                      : 64
  SIP call bandwidth sample-size           : 20
Maximum Number of Clients per AP Radio    : 200
WiFi to Cellular RSSI Threshold           : -85 dbm
Client Network Preference                 : default

Example: view the configuration settings for the 5-GHz band

Device# show ap dot11 5ghz network
                    
802.11a Network : Enabled
11nSupport : Enabled
  802.11a Low Band : Enabled
  802.11a Mid Band : Enabled
  802.11a High Band : Enabled
802.11a Operational Rates
  802.11a 6M : Mandatory
  802.11a 9M : Supported
  802.11a 12M : Mandatory
  802.11a 18M : Supported
  802.11a 24M : Mandatory
  802.11a 36M : Supported
  802.11a 48M : Supported
  802.11a 54M : Supported
802.11n MCS Settings:
  MCS 0 : Supported
  MCS 1 : Supported
  MCS 2 : Supported
  MCS 3 : Supported
  MCS 4 : Supported
  MCS 5 : Supported
  MCS 6 : Supported
  MCS 7 : Supported
  MCS 8 : Supported
  MCS 9 : Supported
  MCS 10 : Supported
  MCS 11 : Supported
  MCS 12 : Supported
  MCS 13 : Supported
  MCS 14 : Supported
  MCS 15 : Supported
  MCS 16 : Supported
  MCS 17 : Supported
  MCS 18 : Supported
  MCS 19 : Supported
  MCS 20 : Supported
  MCS 21 : Supported
  MCS 22 : Supported
  MCS 23 : Supported
802.11n Status:
  A-MPDU Tx:
    Priority 0 : Enabled
    Priority 1 : Disabled
    Priority 2 : Disabled
    Priority 3 : Disabled
    Priority 4 : Enabled
    Priority 5 : Enabled
    Priority 6 : Disabled
    Priority 7 : Disabled
  A-MSDU Tx:
    Priority 0 : Enabled
    Priority 1 : Enabled
    Priority 2 : Enabled
    Priority 3 : Enabled
    Priority 4 : Enabled
    Priority 5 : Enabled
    Priority 6 : Disabled
    Priority 7 : Disabled
Guard Interval : Any
  Rifs Rx : Enabled
Beacon Interval : 100
CF Pollable mandatory : Disabled
CF Poll Request Mandatory : Disabled
CFP Period : 4
CFP Maximum Duration : 60
Default Channel : 36
Default Tx Power Level : 1
DTPC Status : Enabled
Fragmentation Threshold : 2346
Pico-Cell Status : Disabled
Pico-Cell-V2 Status : Disabled
TI Threshold : 0
Legacy Tx Beamforming setting : Disabled
Traffic Stream Metrics Status : Disabled
Expedited BW Request Status : Disabled
EDCA profile type check : default-wmm
Call Admision Control (CAC) configuration
Voice AC
  Voice AC - Admission control (ACM) : Disabled
  Voice Stream-Size : 84000
  Voice Max-Streams : 2
  Voice Max RF Bandwidth : 75
  Voice Reserved Roaming Bandwidth : 6
  Voice Load-Based CAC mode : Enabled
  Voice tspec inactivity timeout : Enabled
CAC SIP-Voice configuration
  SIP based CAC : Disabled
  SIP Codec Type : CODEC_TYPE_G711
  SIP call bandwidth : 64
  SIP call bandwidth sample-size : 20
Video AC
  Video AC - Admission control (ACM) : Disabled
  Video max RF bandwidth : Infinite
  Video reserved roaming bandwidth : 0

Example: view the configuration settings for the 2.4-GHz band

Device# show ap dot11 24ghz network
                    
802.11b Network : Enabled
11gSupport : Enabled
11nSupport : Enabled
  802.11b/g Operational Rates
  802.11b 1M : Mandatory
  802.11b 2M : Mandatory
  802.11b 5.5M : Mandatory
  802.11g 6M : Supported
  802.11g 9M : Supported
  802.11b 11M : Mandatory
  802.11g 12M : Supported
  802.11g 18M : Supported
  802.11g 24M : Supported
  802.11g 36M : Supported
  802.11g 48M : Supported
  802.11g 54M : Supported
802.11n MCS Settings:
  MCS 0 : Supported
  MCS 1 : Supported
  MCS 2 : Supported
  MCS 3 : Supported
  MCS 4 : Supported
  MCS 5 : Supported
  MCS 6 : Supported
  MCS 7 : Supported
  MCS 8 : Supported
  MCS 9 : Supported
  MCS 10 : Supported
  MCS 11 : Supported
  MCS 12 : Supported
  MCS 13 : Supported
  MCS 14 : Supported
  MCS 15 : Supported
  MCS 16 : Supported
  MCS 17 : Supported
  MCS 18 : Supported
  MCS 19 : Supported
  MCS 20 : Supported
  MCS 21 : Supported
  MCS 22 : Supported
  MCS 23 : Supported
802.11n Status:
  A-MPDU Tx:
    Priority 0 : Enabled
    Priority 1 : Disabled
    Priority 2 : Disabled
    Priority 3 : Disabled
    Priority 4 : Enabled
    Priority 5 : Enabled
    Priority 6 : Disabled
    Priority 7 : Disabled
  A-MSDU Tx:
    Priority 0 : Enabled
    Priority 1 : Enabled
    Priority 2 : Enabled
    Priority 3 : Enabled
    Priority 4 : Enabled
    Priority 5 : Enabled
  Priority 6 : Disabled
    Priority 7 : Disabled
  Guard Interval : Any
  Rifs Rx : Enabled
Beacon Interval : 100
CF Pollable Mandatory : Disabled
CF Poll Request Mandatory : Disabled
CFP Period : 4
CFP Maximum Duration : 60
Default Channel : 11
Default Tx Power Level : 1
DTPC Status : true
Call Admission Limit : 105
G711 CU Quantum : 15
ED Threshold : -50
Fragmentation Threshold : 2346
PBCC Mandatory : Disabled
Pico-Cell Status : Disabled
Pico-Cell-V2 Status : Disabled
RTS Threshold : 2347
Short Preamble Mandatory : Enabled
Short Retry Limit : 7
Legacy Tx Beamforming setting : Disabled
Traffic Stream Metrics Status : Disabled
Expedited BW Request Status : Disabled
EDCA profile type : default-wmm
Call Admision Control (CAC) configuration
Voice AC
  Voice AC - Admission control (ACM) : Disabled
  Voice Stream-Size : 84000
  Voice Max-Streams : 2
  Voice Max RF Bandwidth : 75
  Voice Reserved Roaming Bandwidth : 6
  Voice Load-Based CAC mode : Enabled
  Voice tspec inactivity timeout : Enabled
CAC SIP-Voice configuration
  SIP based CAC : Disabled
  SIP Codec Type : CODEC_TYPE_G711
  SIP call bandwidth : 64
  SIP call bandwidth sample-size : 20
Video AC
  Video AC - Admission control (ACM) : Disabled
  Video max RF bandwidth : Infinite
  Video reserved roaming bandwidth : 0

Example: view the status of 802.11h parameters

Device# show wireless dot11
Power Constraint: 0
Channel Switch : Enabled
Channel Switch Mode : Quiet
Smart DFS : Enabled

Example: verify the band-selection settings

This example displays a band-select configuration:
Device# show wireless band-select
                    
Band Select Probe Response   : per WLAN enabling
Cycle Count                  : 2
Cycle Threshold (millisec)   : 200
Age Out Suppression (sec)    : 20
Age Out Dual Band (sec)      : 60
Client RSSI (dBm)            : -80
Client Mid RSSI (dBm)        : -80

This example displays an AP RF profile details:

Device# show ap rf-profile name vid detail
Description                       : 
RF Profile Name                   : vid
Band                              : 2.4 GHz
802.11n client only               : Disabled
Transmit Power Threshold v1       : -70 dBm
Min Transmit Power                : -10 dBm
Max Transmit Power                : 30 dBm
Operational Rates
  802.11b 1M Rate                 : Mandatory 
  802.11b 2M Rate                 : Mandatory 
  802.11b 5.5M Rate               : Mandatory 
  802.11b 11M Rate                : Mandatory 
  802.11b 6M Rate                 : Supported
  802.11b 9M Rate                 : Supported
  802.11b 12M Rate                : Supported
  802.11b 18M Rate                : Supported
  802.11b 24M Rate                : Supported
  802.11b 36M Rate                : Supported
  802.11b 48M Rate                : Supported
  802.11b 54M Rate                : Supported
Max Clients                       : 200
Trap Threshold
  Clients                         : 12 clients
  Interference                    : 10%
  Noise                           : -80 dBm
  Utilization                     : 10%
Multicast Data Rate               : auto
Rx SOP Threshold                  : auto
Band Select
  Probe Response                  :  Disabled
  Cycle Count                     :  2 cycles 
  Cycle Threshold                 :  200 milliseconds 
  Expire Suppression              :  20 seconds 
  Expire Dual Band                :  60 seconds 
  Client RSSI                     :  -80 dBm 
  Client Mid RSSI                 :  -80 dBm 
High Speed Roam
  hsr mode                        :  Disabled	
  hsr neighbor timeout            :  5 
Load Balancing
  Window                          :  5 clients 
  Denial                          :  3 count 
Coverage Data
  Data                            : -62 dBm 
  Voice                           : -80 dBm 
  Minimum Client Level            : 12 clients 
  Exception Level                 : 48% 
DCA Channel List                  : 1,6,11
Unused Channel List               : 2,3,4,5,7,8,9,10
DCA Foreign AP Contribution       : Enabled
802.11n MCS Rates
  MCS  0                          : Enabled 
  MCS  1                          : Enabled 
  MCS  2                          : Enabled 
  MCS  3                          : Enabled 
  MCS  4                          : Enabled 
  MCS  5                          : Enabled 
  MCS  6                          : Enabled 
  MCS  7                          : Enabled 
  MCS  8                          : Enabled 
  MCS  9                          : Enabled 
  MCS 10                          : Enabled 
  MCS 11                          : Enabled 
  MCS 12                          : Enabled 
  MCS 13                          : Enabled 
  MCS 14                          : Enabled 
  MCS 15                          : Enabled 
  MCS 16                          : Enabled 
  MCS 17                          : Enabled 
  MCS 18                          : Enabled 
  MCS 19                          : Enabled 
  MCS 20                          : Enabled 
  MCS 21                          : Enabled 
  MCS 22                          : Enabled 
  MCS 23                          : Enabled 
  MCS 24                          : Enabled 
  MCS 25                          : Enabled 
  MCS 26                          : Enabled 
  MCS 27                          : Enabled 
  MCS 28                          : Enabled 
  MCS 29                          : Enabled 
  MCS 30                          : Enabled 
  MCS 31                          : Enabled 
State                             : Up
Client Network  Preference        : connectivity

Examples: band selection configuration

This example shows how to set the probe cycle count and time threshold for a new scanning cycle period for band select: 
Device# configure terminal
(config)# wireless client band-select cycle-count 3
(config)# wireless client band-select cycle-threshold 5000
(config)# end
This example shows how to set the suppression expiry time to the band select: 
Device# configure terminal
(config)# wireless client band-select expire suppression 100
(config)# end
This example shows how to set the dual-band expiry time for the band select: 
Device# configure terminal
(config)# wireless client band-select expire dual-band 100
(config)# end
This example shows how to set the client RSSI threshold for the band select: 
Device# configure terminal
(config)# wireless client band-select client-rssi 40
(config)# end
This example shows how to configure band selection on specific WLANs: 
Device# configure terminal
(config)# wlan wlan1 25 ssid12
(config-wlan)# band-select
(config)# end

Examples: 802.11 bands configuration

This example shows how to configure 802.11 bands using beacon interval, fragmentation, and dynamic transmit power control: 
Device# configure terminal                   
config)# ap dot11 5ghz shutdown
(config)# ap dot11 24ghz shutdown
(config)# ap dot11 5ghz beaconperiod 500
(config)# ap dot11 5ghz fragmentation 300
(config)# ap dot11 5ghz dtpc
(config)# wireless client association limit 50 interval 1000
(config)# ap dot11 5ghz rate 36 mandatory
(config)# no ap dot11 5ghz shutdown
(config)# no ap dot11 24ghz shutdown
(config)# ap dot11 24ghz dot11g
(config)# end

Examples: 802.11n configuration

This example shows how to configure 802.11n parameters for 5-GHz band using aggregation method: 
Device# configure terminal                   
(config)# ap dot11 5ghz dot11n
(config)# ap dot11 5ghz dot11n mcs tx 20
(config)# wlan wlan1 25 ssid12
(config-wlan)# wmm require
(config-wlan)# exit
(config)# ap dot11 5ghz shutdown
(config)# ap dot11 5ghz dot11n a-mpdu tx priority all
(config)# no ap dot11 5ghz shutdown
(config)# exit
This example shows how to configure the guard interval for 5-GHz band: 
Device# configure terminal                    
(config)# ap dot11 5ghz dot11n
(config)# ap dot11 5ghz dot11n mcs tx 20
(config)# wlan wlan1 25 ssid12
(config-wlan)# wmm require
(config-wlan)# exit
(config)# no ap dot11 5ghz shutdown
(config)# ap dot11 5ghz dot11n guard-interval long
(config)# end
This example shows how to configure the RIFS for 5-GHz band: 
Device# configure terminal                    
(config)# ap dot11 5ghz dot11n
(config)# ap dot11 5ghz dot11n mcs tx 20
(config)# wlan wlan1 25 ssid12
(config-wlan)# wmm require
(config-wlan)# exit
(config)# ap dot11 5ghz shutdown
(config)# ap dot11 5ghz dot11n rifs rx
(config)# end

Examples: 802.11h configuration

This example shows how to configure the AP to announce when it is switching to a new channel using restriction transmission: 
Device# configure terminal
(config)# ap dot11 5ghz shutdown
(config)# ap dot11 5ghz channelswitch mode 0
(config)# no ap dot11 5ghz shutdown
(config)# end
This example shows how to configure the 802.11h power constraint for 5-GHz band: 
Device# configure terminal
(config)# ap dot11 5ghz shutdown
(config)# ap dot11 5ghz power-constraint 200
(config)# no ap dot11 5ghz shutdown
(config)# end