Configuring 802.11 parameters and Band Selection

Finding Feature Information

Your software release may not support all of the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Restrictions on Band Selection, 802.11 Bands, and Parameters

  • Band-selection enabled WLANs do not support time-sensitive applications like voice and video because of roaming delays.

  • Band selection can be used only with Cisco Aironet 1040, 1140, 1250, 1260, 1550, 2600, 3500, 3600, series access points.

  • Band selection operates only on access points that are connected to a controller. A FlexConnect access point without a controller connection does not perform band selection after a reboot.

  • The band-selection algorithm directs dual-band clients only from the 2.4-GHz radio to the 5-GHz radio of the same access point, and it only runs on an access point when both the 2.4-GHz and 5-GHz radios are up and running.

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

  • It is not possible to enable or disable band selection and client load balancing globally through the controller GUI or CLI. You can, however, enable or disable band selection and client load balancing for a particular WLAN. Band selection and client load balancing are enabled globally by default.

Information About Configuring Band Selection, 802.11 Bands, and Parameters

Band Selection

Band selection enables client radios that are capable of dual-band (2.4- and 5-GHz) operation to move to a less congested 5-GHz access point. The 2.4-GHz band is often congested. Clients on this band typically experience interference from Bluetooth devices, microwave ovens, and cordless phones as well as co-channel interference from other access points because of the 802.11b/g limit of three nonoverlapping channels. To prevent these sources of interference and improve overall network performance, you can configure band selection on the switch.

Band selection is enabled globally by default.

Band selection works by regulating probe responses to clients. It makes 5-GHz channels more attractive to clients by delaying probe responses to clients on 2.4-GHz channels.

802.11 Bands

You can configure the 802.11b/g/n (2.4-GHz) and 802.11a/n (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 are enabled.

When a controller is configured to allow only 802.11g traffic, 802.11b client devices are able to successfully connect to an access point but cannot pass traffic. When you configure the controller for 802.11g traffic only, you must mark 11g rates as mandatory.

802.11n Parameter

This section provides instructions for managing 802.11n devices such as the Cisco Aironet 1140 and 3600 Series Access Points 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 802.11n access points for WLANs using WMM with no Layer 2 encryption or with WPA2/AES encryption enabled.


Note
Some Cisco 802.11n APs may intermittently emit incorrect beacon frames, which can trigger false wIPS alarms. We recommend that you ignore these alarms. The issue is observed in the following Cisco 802.11n APs: 1140, 1250, 2600, 3500, and 3600.

802.11h Parameter

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

How to Configure 802.11 Bands and Parameters

Configuring Band Selection (CLI)

SUMMARY STEPS

  1. configure terminal
  2. wireless client band-select cycle-count cycle_count
  3. wireless client band-select cycle-threshold milliseconds
  4. wireless client band-select expire suppression seconds
  5. wireless client band-select expire dual-band seconds
  6. wireless client band-select client-rssi client_rssi
  7. end
  8. wlan wlan_profile_name wlan_ID SSID_network_name band-select
  9. end

DETAILED STEPS

  Command or Action Purpose
Step 1

configure terminal

Example:

Switch# configure terminal

Enters global configuration mode.
Step 2

wireless client band-select cycle-count cycle_count

Example:

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

Sets the probe cycle count for band select.

You can enter a value between 1 and 10 for the cycle_count parameter.

Step 3

wireless client band-select cycle-threshold milliseconds

Example:

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

Sets the time threshold for a new scanning cycle period.

You can enter a value for threshold between 1 and 1000 for the milliseconds parameter.

Step 4

wireless client band-select expire suppression seconds

Example:

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

Sets the suppression expire to the band select.

You can enter a value for suppression between 10 to 200 for the seconds parameter.

Step 5

wireless client band-select expire dual-band seconds

Example:

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

Sets the dual band expire.

You can enter a value for dual band between 10 and 300 for the seconds parameter.

Step 6

wireless client band-select client-rssi client_rssi

Example:

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

Sets the client RSSI threshold.

You can enter a value for minimum dBm of a client RSSI to respond to a probe between 20 and 90 for the client_rssi parameter.

Step 7

end

Example:

Switch(config)# end

Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode.

Step 8

wlan wlan_profile_name wlan_ID SSID_network_name band-select

Example:

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

Configures band selection on specific WLANs.

You can enter a value between 1 and 512 for the wlan_ID parameter.

You can enter the up to 32 alphanumeric characters for SSID_network_name parameter.

Step 9

end

Example:

Switch(config)# end

Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode.

Configuring the 802.11 Bands (CLI)

You can configure 802.11 bands and parameters.

SUMMARY STEPS

  1. configure terminal
  2. ap dot11 5ghz shutdown
  3. ap dot11 24ghz shutdown
  4. ap dot11 {5ghz | 24ghz} beaconperiod time_unit
  5. ap dot11 {5ghz | 24ghz} fragmentation threshold
  6. ap dot11 {5ghz | 24ghz} dtpc
  7. wireless client association limit number interval milliseconds
  8. ap dot11 {5ghz | 24ghz} rate rate {disable | mandatory | supported}
  9. no ap dot11 5ghz shutdown
  10. no ap dot11 24ghz shutdown
  11. ap dot11 24ghz dot11g
  12. end

DETAILED STEPS

  Command or Action Purpose
Step 1

configure terminal

Example:

Switch# configure terminal

Enters global configuration mode.
Step 2

ap dot11 5ghz shutdown

Example:

Switch(config)# ap dot11 5ghz shutdown

Disables the 802.11a band.

Note 

You must disable the 802.11a band before configuring the 802.11a network parameters.
Step 3

ap dot11 24ghz shutdown

Example:

Switch(config)# ap dot11 24ghz shutdown

Disables the 802.11b band.

Note 

You must disable the 802.11b band before configuring the 802.11b network parameters.
Step 4

ap dot11 {5ghz | 24ghz} beaconperiod time_unit

Example:

Switch(config)# ap dot11 5ghz beaconperiod 500

Specifies the rate at which the SSID is broadcast by the access point.

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

Step 5

ap dot11 {5ghz | 24ghz} fragmentation threshold

Example:

Switch(config)# ap dot11 5ghz fragmentation 300

Specifies the size at which packets are fragmented.

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 6

ap dot11 {5ghz | 24ghz} dtpc

Example:

Switch(config)# ap dot11 5ghz dtpc 
Switch(config)# no ap dot11 24ghz dtpc

Enables access points to advertise their channels and transmit the power levels in beacons, and probe responses.

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.
Note 

On access points that run Cisco IOS software, this feature is called world mode.

The no form of the command disables the 802.11a or 802.11b DTPC setting.

Step 7

wireless client association limit number interval milliseconds

Example:

Switch(config)# wireless client association limit 50 interval 1000

Specifies the maximum allowed clients that can be configured.

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

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

Step 8

ap dot11 {5ghz | 24ghz} rate rate {disable | mandatory | supported}

Example:

Switch(config)# ap dot11 5ghz rate 36 mandatory
Specifies the rate at which data can be transmitted between the controller and the client.

  • disabled—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 access point on the controller.

  • supported—Any associated clients that support this data rate may communicate with the access point using that rate. However, the clients are not required to be able 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 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 Mbps.

Step 9

no ap dot11 5ghz shutdown

Example:

Switch(config)# no ap dot11 5ghz shutdown

Enables the 802.11a band.

Note 

The default value is enabled.
Step 10

no ap dot11 24ghz shutdown

Example:

Switch(config)# no ap dot11 24ghz shutdown

Enables the 802.11b band.

Note 

The default value is enabled.
Step 11

ap dot11 24ghz dot11g

Example:

Switch(config)# ap dot11 24ghz dot11g

Enables or disables 802.11g network support.

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.

Step 12

end

Example:

Switch(config)# end

Returns to privileged EXEC mode.

Configuring the 802.11 Bands (GUI)

Procedure

Step 1

Choose Configuration > Wireless > 802.11a/n/ac > Network or Configuration > Wireless > 802.11b/g/n > Network to open the Global Parameters page.

Step 2

Select the 802.11a/n/ac (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.

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.

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 value is 100 milliseconds.

Note 

The beacon period in controllers is listed in terms of milliseconds. The beacon period can also be measured in time units, where one time unit equals 1024 microseconds or 102.4 milliseconds. If a beacon interval is listed as 100 milliseconds in a controller, it is only a rounded off value for 102.4 milliseconds. Due to hardware limitation in certain radios, even though the beacon interval is, say 100 time units, it is adjusted to 102 time units, which roughly equals 104.448 milliseconds. When the beacon period is to be represented in terms of time units, the value is adjusted to the nearest multiple of 17.

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.

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.

Note 

On access points that run Cisco IOS software, this feature is called world mode .

Note 

DTPC and 801.11h power constraint cannot be enabled simultaneously.

Step 7

Specify the maximum allowed clients by entering a value between 1 to 200 in the Maximum Allowed Client text box. The default value is 200.

Step 8

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:

  • 802.11a—6, 9, 12, 18, 24, 36, 48, and 54 Mbps

  • 802.11b/g—1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 Mbps

For each data rate, choose one of these options:

  • Mandatory—Clients must support this data rate in order to associate to an access point on the controller.

  • Supported—Any associated clients that support this data rate may communicate with the access point using that rate. However, the clients are not required to be able to use this rate in order to associate.

  • Disabled—The clients specify the data rates used for communication.

Step 9

Click Apply.

Step 10

Click Save Configuration.

Configuring 802.11n Parameters (CLI)

SUMMARY STEPS

  1. configure terminal
  2. ap dot11 {5ghz | 24ghz} dot11n
  3. ap dot11 {5ghz | 24ghz} dot11n mcs tx rtu
  4. wlanwlan_profile_name wlan_ID SSID_network_name wmm require
  5. ap dot11 {5ghz | 24ghz} shutdown
  6. {ap | no ap} dot11 {5ghz | 24 ghz} dot11n a-mpdu tx priority {all | 0-7}
  7. no ap dot11 {5ghz | 24ghz} shutdown
  8. ap dot11 {5ghz | 24ghz} dot11n guard-interval {any | long}
  9. ap dot11 {5ghz | 24ghz} dot11n rifs rx
  10. end

DETAILED STEPS

  Command or Action Purpose
Step 1

configure terminal

Example:

Switch# configure terminal

Enters global configuration mode.
Step 2

ap dot11 {5ghz | 24ghz} dot11n

Example:

Switch(config)# ap dot11 5ghz dot11n

Enables 802.11n support on the network.

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

Step 3

ap dot11 {5ghz | 24ghz} dot11n mcs tx rtu

Example:

Switch(config)# ap dot11 5ghz dot11n mcs tx 20

Specifies the modulation and coding scheme (MCS) rates at which data can be transmitted between the access point and the client. You can set a value from 0 through 23 for the mcs tx parameter.

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

Step 4

wlanwlan_profile_name wlan_ID SSID_network_name wmm require

Example:

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

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

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

Step 5

ap dot11 {5ghz | 24ghz} shutdown

Example:

Switch(config)# ap dot11 5ghz shutdown

Disables the network.
Step 6

{ap | no ap} dot11 {5ghz | 24 ghz} dot11n a-mpdu tx priority {all | 0-7}

Example:

Switch(config)# ap dot11 5ghz dot11n a-mpdu tx priority all

Specifies the aggregation method used for 802.11n packets.

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 following table defines the priority levels (0-7) assigned per traffic type.

Table 1. Traffic Type Priority Levels

User Priority

Traffic Type

0

Best effort

1

Background

2

Spare

3

Excellent effort

4

Controlled load

5

Video, less than 100-ms latency and jitter

6

Voice, less than 100-ms latency and jitter

7

Network control

You can configure each priority level independently, or you can use the all parameter to configure all of the priority levels at once. You can configure priority levels so that the traffic uses either A-MPDU transmission or A-MSDU transmission.

  • When you use the ap command along with the other options, the traffic associated with 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, A-MPDU is enabled for priority level 0, 4 and 5 and the rest are disabled. By default, A-MPDU is enabled for all priorities except 6 and 7.

Step 7

no ap dot11 {5ghz | 24ghz} shutdown

Example:

Switch(config)# no ap dot11 5ghz shutdown

Reenables the network.
Step 8

ap dot11 {5ghz | 24ghz} dot11n guard-interval {any | long}

Example:

Switch(config)# ap dot11 5ghz dot11n guard-interval long

Configures the guard interval for the network.
Step 9

ap dot11 {5ghz | 24ghz} dot11n rifs rx

Example:

Switch(config)# ap dot11 5ghz dot11n rifs rx

Configures the Reduced Interframe Space (RIFS) for the network.
Step 10

end

Example:

Switch(config)# end

Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode.

Configuring the 802.11n Parameters (GUI)

Procedure

Step 1

Choose Configuration > Wireless > 802.11a/n/ac or 802.11b/g/n > High Throughput (802.11n) to open the 802.11n/ac (5 GHz or 2.4 GHz) Throughput page.

Step 2

Select the Enable 11n check box to enable 802.11n support on the network. The default value is enabled.

Step 3

Select the check boxes of the desired rates to specify the modulation and coding scheme (MCS) rates at which data can be transmitted between the access point and the client. These data rates, which are calculated for a 20-MHz channel width using a short guard interval, are available:

  • 0 (7 Mbps)

  • 1 (14 Mbps)

  • 2 (21 Mbps)

  • 3 (29 Mbps)

  • 4 (43 Mbps)

  • 5 (58 Mbps)

  • 6 (65 Mbps)

  • 7 (72 Mbps)

  • 8 (14 Mbps)

  • 9 (29 Mbps)

  • 10 (43 Mbps)

  • 11 (58 Mbps)

  • 12 (87 Mbps)

  • 13 (116 Mbps)

  • 14 (130 Mbps)

  • 15 (144 Mbps)

  • 16 (22 Mbps)

  • 17 (43 Mbps)

  • 18 (65 Mbps)

  • 19 (87 Mbps)

  • 20 (130 Mbps)

  • 21 (173 Mbps)

  • 22 (195 Mbps)

  • 23 (217 Mbps)

  • Any associated clients that support the selected rates may communicate with the access point using those rates. However, the clients are not required to be able to use this rate in order to associate. The MCS settings determine the number of spatial streams, the modulation, the coding rate, and the data rate values that are used.

Step 4

Click Apply.

Step 5

Use the 802.11n data rates that you configured by enabling WMM on the WLAN as follows:

  1. Choose WLANs to open the WLANs page.

  2. Click the ID number of the WLAN for which you want to configure WMM mode.

  3. When the WLANs > Edit page appears, choose the QoS tab to open the WLANs > Edit (Qos) page.

  4. From the WMM Policy drop-down list, choose Required or Allowed to require or allow client devices to use WMM. Devices that do not support WMM cannot join the WLAN.

    If you choose Allowed, devices that cannot support WMM can join the WLAN but will not benefit from the 802.11n rates.

  5. Click Apply.

Step 6

Click Save Configuration.

Note 

To determine if an access point supports 802.11n, look at the 11n Supported text box on either the 802.11a/n (or 802.11b/g/n) Cisco APs > Configure page or the 802.11a/n (or 802.11b/g/n) AP Interfaces > Details page.

Configuring 802.11h Parameters (CLI)

SUMMARY STEPS

  1. configure terminal
  2. ap dot11 5ghz shutdown
  3. {ap | no ap} dot11 5ghz channelswitch mode switch_mode
  4. ap dot11 5ghz power-constraint value
  5. no ap dot11 5ghz shutdown
  6. end

DETAILED STEPS

  Command or Action Purpose
Step 1

configure terminal

Example:

Switch# configure terminal

Enters global configuration mode.
Step 2

ap dot11 5ghz shutdown

Example:

Switch(config)# ap dot11 5ghz shutdown

Disables the 802.11a network.
Step 3

{ap | no ap} dot11 5ghz channelswitch mode switch_mode

Example:

Switch(config)# ap dot11 5ghz channelswitch mode 0

Enables or disables the access point to announce when it is switching to a new channel.

You can enter a 0 or 1 for the channelswitch parameter to specify whether transmissions are restricted until the actual channel switch (0) or are not restricted (1). The default value is disabled.

Step 4

ap dot11 5ghz power-constraint value

Example:

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

Configures the 802.11h power constraint value in a range from zero through 255.

The default value for the value parameter is 3 dB.
Step 5

no ap dot11 5ghz shutdown

Example:

Switch(config)# no ap dot11 5ghz shutdown

Reenables the 802.11a network.
Step 6

end

Example:

Switch(config)# end

Returns to privileged EXEC mode. Alternatively, you can also press Ctrl-Z to exit global configuration mode.

Configuring the 802.11h Parameters (GUI)

Procedure

Step 1

Disable the 802.11 band as follows:

  1. Choose Configuration > Wireless > 802.11a/n/ac > Network to open the 802.11a/n/ac Global Parameters page.

  2. Unselect the 802.11a Network Status check box.

  3. Click Apply.

Step 2

Choose Configuration > Wireless > 802.11a/n/ac > DFS (802.11h) to open the 802.11h Global Parameters page.

Step 3

In the Power Constraint area, enter the local power constraint. The valid range is between 0 dBm and 30 dBm.

Step 4

In the Channel Switch Announcement area, enter the channel switch announcement mode. You can enter a value of either 1 or 0.

Step 5

Click Apply.

Step 6

Reenable the 802.11a band as follows:

  1. Choose Wireless > 802.11a/n/ac > Network to open the 802.11a/n/ac Global Parameters page.

  2. Select the 802.11a Network Status check box.

  3. Click Apply.

Step 7

Click Save Configuration.

Monitoring Configuration Settings for Band Selection, 802.11 Bands, and Parameters

Monitoring Configuration Settings Using Band Selection and 802.11 Bands Commands

This section describes the new commands for band selection and 802.11 bands.

The following commands can be used to monitor band selection, and 802.11 bands and parameters the switch.

Table 2. Monitoring Configuration Settings Using Band Selection and 802.11 Bands Commands

Command

Purpose
show ap dot11 5ghz network

Displays 802.11a bands network parameters, 802.11a operational rates, 802.11n MCS settings, and 802.11n status information.

show ap dot11 24ghz network

Displays 802.11b bands 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: Viewing the Configuration Settings for 5-GHz Band


Switch# 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 bandwith sample-size : 20
Video AC
  Video AC - Admission control (ACM) : Disabled
  Video max RF bandwidth : Infinite
  Video reserved roaming bandwidth : 0

Example: Viewing the Configuration Settings for 24-GHz Band


Switch# 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 bandwith sample-size : 20
Video AC
  Video AC - Admission control (ACM) : Disabled
  Video max RF bandwidth : Infinite
  Video reserved roaming bandwidth : 0

Example: Viewing the status of 802.11h Parameters


Switch# show wireless dot11h
Power Constraint: 0
Channel Switch: 0
Channel Switch Mode: 0

Example: Verifying the Band Selection Settings


Switch# 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

Configuration Examples for Band Selection, 802.11 Bands, and Parameters

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:

Switch# configure terminal
Switch(config)# wireless client band-select cycle-count 3
Switch(config)# wireless client band-select cycle-threshold 5000
Switch(config)# end
This example shows how to set the suppression expire to the band select:

Switch# configure terminal
Switch(config)# wireless client band-select expire suppression 100 
Switch(config)# end
This example shows how to set the dual band expire for the band select:

Switch# configure terminal
Switch(config)# wireless client band-select expire dual-band 100
Switch(config)# end
This example shows how to set the client RSSI threshold for the band select:

Switch# configure terminal
Switch(config)# wireless client band-select client-rssi 40
Switch(config)# end
This example shows how to configure band selection on specific WLANs:

Switch# configure terminal
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# band-select
Switch(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:

Switch# configure terminal
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 24ghz shutdown
Switch(config)# ap dot11 5ghz beaconperiod 500
Switch(config)# ap dot11 5ghz fragmentation 300
Switch(config)# ap dot11 5ghz dtpc
Switch(config)# wireless client association limit 50 interval 1000
Switch(config)# ap dot11 5ghz rate 36 mandatory
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)# no ap dot11 24ghz shutdown
Switch(config)# ap dot11 24ghz dot11g
Switch(config)#end

Examples: 802.11n Configuration

This example shows how to configure 802.11n parameters for 5-GHz band using aggregation method:

Switch# configure terminal
Switch(config)# ap dot11 5ghz dot11n
Switch(config)# ap dot11 5ghz dot11n mcs tx 20
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# wmm require\
Switch(config-wlan)# exit
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz dot11n a-mpdu tx priority all
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)#exit
This example shows how to configure the guard interval for 5-GHz band:

Switch# configure terminal
Switch(config)# ap dot11 5ghz dot11n
Switch(config)# ap dot11 5ghz dot11n mcs tx 20
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# wmm require\
Switch(config-wlan)# exit
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz dot11n guard-interval long
Switch(config)#end
This example shows how to configure the RIFS for 5-GHz band:

Switch# configure terminal
Switch(config)# ap dot11 5ghz dot11n
Switch(config)# ap dot11 5ghz dot11n mcs tx 20
Switch(config)# wlan wlan1 25 ssid12
Switch(config-wlan)# wmm require\
Switch(config-wlan)# exit
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz dot11n rifs rx
Switch(config)#end

Examples: 802.11h Configuration

This example shows how to configure the access point to announce when it is switching to a new channel using restriction transmission:

Switch# configure terminal
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz channelswitch mode 0
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)#end
This example shows how to configure the 802.11h power constraint for 5-GHz band:

Switch# configure terminal
Switch(config)# ap dot11 5ghz shutdown
Switch(config)# ap dot11 5ghz power-constraint 200
Switch(config)# no ap dot11 5ghz shutdown
Switch(config)#end

Additional References for 802.11 Parameters and Band Selection

Related Documents

Related Topic Document Title
System management commands

System Management Command Reference, Cisco IOS XE Release 3SE (Cisco WLC 5700 Series)

Standards and RFCs

Standard/RFC Title
None

—

MIBs

MIB MIBs Link
All supported MIBs for this release.

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

Technical Assistance

Description Link

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Feature History and Information For Performing 802.11 parameters and Band Selection Configuration

Release Feature Information
Cisco IOS XE 3.2SECisco IOS XE 3.2SE This feature was introduced.