OFDMA Support for 11ax Access Points

Information About OFDMA Support for 11ax Access Points

The Cisco Catalyst 9100 series access points are the next generation WiFi 802.11ax access point, which is ideal for high-density high-definition applications.

The IEEE 802.11ax protocol aims to improve user experience and network performance in high density deployments for both 2.4 GHz and 5 GHz. The 802.11ax APs supports transmission or reception to more than one client simultaneously using Orthogonal Frequency Division Multiplexing (OFDMA).

The IEEE 802.11ax supports uplink MU-MIMO and also adds OFDMA for multiple users in the uplink and downlink. All the users in IEEE 802.11ax OFDMA have the same time allocations and it ends at the same time. In MU-MIMO and OFDMA, multiple stations (STAs) either simultaneously transmit to a single STA or simultaneously receive from a single STA independent data streams over the same radio frequencies.

Supported Modes on 11ax Access Points

The following AP modes are supported:

  • Local mode

  • Flex-connect mode

  • Bridge mode

  • Flex+Mesh mode

Configuring 11AX (GUI)

You can configure 11ax for the frequencies, 5 GHz and 2.4 GHz.

Procedure

Step 1

Choose Configuration > Radio Configurations > High Throughput.

Step 2

Click the 5 GHz Band tab.

  1. Expand the 11ax section.

  2. Select the Enable 11ax and Multiple Bssid check boxes, if required.

  3. Check either the Select All check box to configure all the data rates or select the desired options from the available data rates list.

Step 3

Click the 2.4 GHz Band tab.

  1. Expand the 11ax section.

  2. Select the Enable 11ax and Multiple Bssid check boxes, if required.

  3. Check either the Select All check box to configure all the data rates or select the desired options from the available data rates list.

Configuring Channel Width

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters the global configuration mode.

Step 2

ap dot11{ 24ghz| 5ghz} rrm channel dca chan-width 160

Example:

Device(config)# ap dot11 5ghz rrm channel dca chan-width 160

Configures channel width for 802.11 radios as 160.

Use the no form of the command to disable the configuration.

Note

 

Cisco Catalyst 9115 and C9120 series APs do not support 80+80 channel width. Cisco Catalyst 9117 series APs do not support OFDMA in 160 channel width.

Step 3

ap dot11{ 24ghz| 5ghz} rf-profile profile-name

Example:

Device(config)# ap dot11 5ghz rf-profile ax-profile

Configures an RF profile and enters RF profile configuration mode.

Step 4

channel chan-width 160

Example:

Device(config-rf-profile)# channel chan-width 160

Configures the RF profile DCA channel width.

Configuring 802.11ax Radio Parameters (GUI)

Procedure

Step 1

Choose Configuration > Radio Configurations > High Throughput > 5 GHz Band > 11ax.

Step 2

Check or uncheck the Enable 11 n check box.

Step 3

Check the check boxes for the desired MCS/(data rate) or to select all of them, check the Select All check box.

Step 4

Click Apply.

Step 5

Choose Configuration > Radio Configurations > High Throughput > 2.4 GHz Band > 11ax.

Step 6

Check or uncheck the Enable 11 n check box.

Step 7

Check the check boxes for the desired MCS/(data rate) or to select all of them, check the Select All check box.

Step 8

Click Apply.

Step 9

Choose Configuration > Wireless > Access Points.

Step 10

Click the Access Point.

Step 11

In the Edit AP dialog box, enable the LED State toggle button and choose the LED brightness level from the LED Brightness Level drop-down list.

Step 12

Click Update and Apply to Device.

Configuring 802.11ax Radio Parameters (CLI)

Follow the procedure given below to configure radio parameters:

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters the global configuration mode.

Step 2

ap dot11{ 24ghz| 5ghz} dot11ax

Example:

Device(config)# ap dot11 5ghz dot11ax

Enables the 11ax 5 Ghz band radio.

Use the no form of the command to disable the configuration.

Step 3

ap dot11{ 24ghz| 5ghz} dot11ax mcs tx index index spatial-stream spatial-stream-value

Example:

Device(config)# ap dot11 5ghz dot11ax mcs tx index 11 spatial-stream 8

Enables the 11ax 5 Ghz band modulation and coding scheme (MCS) transmission rates.

Step 4

ap led-brightness brightness-level

Example:

Device(config)# ap led-brightness 6

(Optional) Configures the led brightness level.

Setting up the 802.11ax Radio Parameters

Procedure

  Command or Action Purpose

Step 1

enable

Example:

Device# enable

Enters privileged EXEC mode.

Step 2

ap name ap-name led-brightness-level brightness-level

Example:

Device# ap name ax-ap led-brightness-level 6

Configures the led brightness level.

Step 3

ap name ap-namedot11{ 24ghz| 5ghz} dot11n antenna antenna-port

Example:

Device# ap name ap1 dot11 5ghz dot11n antenna A

Configures the 802.11n - 5 GHz antenna selection.

Use the no form of the command to disable the configuration.

Step 4

ap name ap-name dot11{ 24ghz| 5ghz} channel width channel-width

Example:

Device# ap name ap1 dot11 5ghz channel width 160

Configures 802.11 channel width.

Step 5

ap name ap-name dot11{ 24ghz| 5ghz} secondary-80 channel-num

Example:

Device# ap name ap1 dot11 5ghz secondary-80 12

Configures the advanced 802.11 secondary 80Mhz channel assignment parameters.

Configuring OFDMA on a WLAN


Note

For Cisco Catalyst 9115 and 9120 series APs, the configuration given below are per radio, and not per WLAN. This feature remains enabled on the controller, if it is enabled on any of the WLANs.

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Device# configure terminal

Enters the global configuration mode.

Step 2

wlan wlan1

Example:

Device(config)# wlan wlan1

Enters the WLAN configuration mode.

Step 3

dot11ax downlink-ofdma

Example:

Device(config-wlan)# dot11ax downlink-ofdma

Enables the downlink connection that uses the OFDMA technology.

Use the no form of the command to disable the configuration.

Step 4

dot11ax uplink-ofdma

Example:

Device(config-wlan)# dot11ax uplink-ofdma

Enables the uplink connection that uses the OFDMA technology .

Step 5

dot11ax downlink-mumimo

Example:

Device(config-wlan)# dot11ax downlink-mumimo

Enables the downlink connection that uses the MUMIMO technology.

Step 6

dot11ax uplink-mumimo

Example:

Device(config-wlan)# dot11ax uplink-mumimo

Enables the uplink connection that uses the MUMIMO technology.

Step 7

dot11ax twt-broadcast-support

Example:

Device (config-wlan)# dot11ax twt-broadcast-support

Enables the TWT broadcast support operation.

Verifying Channel Width

To verify the channel width and other channel information, use the following show commands: 

Device# show ap dot11 5ghz summary

AP Name             Mac Address       Slot    Admin State  Oper State  Channel    Width    Txpwr
--------------------------------------------------------------------------------------------------------
AP80e0.1d75.6954    80e0.1d7a.7620     1       Enabled      Up          (52)*      160      1(*)

Device# show ap dot11 dual-band summary

AP Name        Subband    Radio Mac        Status     Channel    Power Level  Slot ID        Mode        
---------------------------------------------------------------------------------------------------------
kartl28021mi    All       002a.1058.38a0    Enabled   (52)*      (1)*            1           REAP

Device# show ap name <ap-name> channel

802.11b/g Current Channel                        : 11
Slot ID                                          : 0
Allowed Channel List                             : 1,2,3,4,5,6,7,8,9,10,11
802.11a Current Channel ....................... 52  (160 MHz) 
Slot ID                                          : 1
Allowed Channel List                             : 36,40,44,48,52,56,60,64,100,104,108,112,116,132,136,140,149,153,157,161,165

Device# show ap name <ap-name> config slot <slot-num>
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Phy OFDM Parameters
              Configuration                              : Automatic
              Current Channel                            : 52
              Extension Channel                          : No Extension
              Channel Width                              : 160 MHz
             Allowed Channel List                        : 36,40,44,48,52,56,60,64,100,104,108,112,116,132,136,140,149,153,157,161,165
             TI Threshold                                : 0

Device# show ap dot11 5ghz channel
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  DCA Sensitivity Level                      : MEDIUM : 15 dB
  DCA 802.11n/ac Channel Width               : 160 MHz
  DCA Minimum Energy Limit                   : -95 dBm
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Device# show ap rf-profile name <name> detail
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Unused Channel List               : 165
DCA Bandwidth                     :  160 MHz
DCA Foreign AP Contribution       : Enabled
.
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.

Verifying Client Details

To verify the client information, use the following show commands: 

Device# show wireless client mac-address <mac-address> detail



Client MAC Address : a886.ddb2.05e9
Client IPv4 Address : 169.254.175.214
Client IPv6 Addresses : fe80::b510:a381:8099:4747
                        2009:300:300:57:4007:6abb:2c9a:61e2
Client Username: N/A
Voice Client Type   : Unknown
AP MAC Address : c025.5c55.e400
AP Name: APe4c7.22b2.948e
Device Type: N/A
Device Version: N/A
AP slot : 0
Client State : Associated
Policy Profile : default-policy-profile
Flex Profile : default-flex-profile
Wireless LAN Id : 1
Wireless LAN Name: SSS_OPEN
BSSID : c025.5c55.e406
Connected For : 23 seconds 
Protocol : 802.11ax - 5 GHz
Channel : 8
Client IIF-ID : 0xa0000001
Association Id : 1
Authentication Algorithm : Open System
Client CCX version : No CCX support
Session Timeout : 86400 sec (Remaining time: 86378 sec)

.
.
.
Device# show wireless client summary 

Number of Local Clients: 1

MAC Address    AP Name                          WLAN  State             Protocol Method     Role
---------------------------------------------------------------------------------------------------
a886.ddb2.05e9 APe4c7.22b2.948e                 1     Run               11ax(5) None       Local             


Device# show wireless stats client detail


Total Number of Clients : 1

Protocol Statistics

-----------------------------------------------------------------------------
Protcol            Client Count
802.11b              0
802.11g              0
802.11a              0
802.11n-2.4 GHz      0
802.11n-5 GHz        0
802.11ac             0
80211ax             1

Verifying Radio Configuration

To verify the radio configuration information, use the following show commands: 

Device# show ap dot11 5ghz network

802.11a Network                           : Enabled
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802.11ax                                  : Enabled
  DynamicFrag                             : Enabled
  MultiBssid                              : Disabled
802.11ax MCS Settings:
  MCS  7, Spatial Streams = 1             : Disabled
  MCS  9, Spatial Streams = 1             : Disabled
  MCS 11, Spatial Streams = 1             : Disabled
  MCS  7, Spatial Streams = 2             : Supported
  MCS  9, Spatial Streams = 2             : Supported
  MCS 11, Spatial Streams = 2             : Supported
  MCS  7, Spatial Streams = 3             : Supported
  MCS  9, Spatial Streams = 3             : Disabled
  MCS 11, Spatial Streams = 3             : Disabled
  MCS  7, Spatial Streams = 4             : Supported
  MCS  9, Spatial Streams = 4             : Supported
  MCS 11, Spatial Streams = 4             : Supported
  MCS  7, Spatial Streams = 5             : Supported
  MCS  9, Spatial Streams = 5             : Supported
  MCS 11, Spatial Streams = 5             : Supported
  MCS  7, Spatial Streams = 6             : Supported
  MCS  9, Spatial Streams = 6             : Supported
  MCS 11, Spatial Streams = 6             : Supported
  MCS  7, Spatial Streams = 7             : Supported
  MCS  9, Spatial Streams = 7             : Supported
  MCS 11, Spatial Streams = 7             : Supported
  MCS  7, Spatial Streams = 8             : Supported
  MCS  9, Spatial Streams = 8             : Supported
  MCS 11, Spatial Streams = 8             : Supported
Beacon Interval                           : 100      
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Maximum Number of Clients per AP Radio    : 200

Device# show ap dot11 24ghz network

802.11b Network                           : Enabled
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802.11axSupport...................................... Enabled
      dynamicFrag................................ Disabled
      multiBssid................................. Disabled   
802.11ax                                  : Enabled  
  DynamicFrag                             : Enabled
  MultiBssid                              : Enabled
802.11ax MCS Settings:
  MCS  7, Spatial Streams = 1             : Supported
  MCS  9, Spatial Streams = 1             : Supported
  MCS 11, Spatial Streams = 1             : Supported
  MCS  7, Spatial Streams = 2             : Supported
  MCS  9, Spatial Streams = 2             : Supported
  MCS 11, Spatial Streams = 2             : Supported
  MCS  7, Spatial Streams = 3             : Supported
  MCS  9, Spatial Streams = 3             : Supported
  MCS 11, Spatial Streams = 3             : Supported
  MCS  7, Spatial Streams = 4             : Disabled
  MCS  9, Spatial Streams = 4             : Disabled
  MCS 11, Spatial Streams = 4             : Disabled 
Beacon Interval                           : 100      
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Maximum Number of Clients per AP Radio    : 200

Device# show wlan ID <wlan-id>

WLAN Profile Name     : ax-wlc
================================================
Identifier                                     : 1
Network Name (SSID)                            : ax-wlc
Status                                         : Enabled    
Broadcast SSID                                 : Enabled    
Universal AP Admin                             : Disabled   
Max Associated Clients per WLAN                : 0          
Max Associated Clients per AP per WLAN         : 0          
Max Associated Clients per AP Radio per WLAN   : 200        
Number of Active Clients                       : 0          
CHD per WLAN                                   : Enabled    
Multicast Interface                            : Unconfigured
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802.11ac MU-MIMO                               : Disabled
802.11ax paramters
    OFDMA Downlink                             : Enabled
    OFDMA Uplink                               : Enabled
    MU-MIMO Downlink                           : Enabled
    MU-MIMO Uplink                             : Enabled
    BSS Color                                  : Enabled
    Partial BSS Color                          : Enabled
    BSS Color Code                             : 0
    BSS Target Wake Up Time                    : Enabled

Device# show ap led-brightness-level summary 

AP Name                           LED Brightness level    
--------------------------------------------------------
AP00FC.BA01.CC00                  Not Supported           
AP70DF.2FA2.72EE                  8                       
AP7069.5A74.6678                  2                       
APb838.6159.e184                  Not Supported