Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide, Cisco IOS XE 26.x

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Cisco Catalyst 9800 Series Wireless Controller Software Configuration Guide, Cisco IOS XE 26.x

Configure 802.11w

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Provides instructions for configuring, disabling, and monitoring 802.11w, including step-by-step procedures for GUI-based and other configurations to ensure effective implementation and management of 802.11w features.



Configure 802.11w (GUI)

To protect management traffic against spoofing and replay attacks, configure 802.11w settings after enabling WPA and AKM.

Enable protected management frames (PMF) on a WLAN to strengthen security for management communications.

Before you begin

Ensure WPA and AKM are configured on the target WLAN.

Procedure

  1. Choose Configuration > Tags & Profiles > WLANs.

  2. Click Add to create WLANs.

    The Add WLAN page is displayed.

  3. In the Security > Layer2 tab, navigate to the Protected Management Frame section.

  4. Choose PMF as Disabled, Optional, or Required. By default, the PMF is disabled.

    If you choose PMF as Optional or Required, you can view these fields:

    • Association Comeback Timer—Enter a value between 1 and 10 seconds to configure 802.11w association comeback time.

    • SA Query Time—Enter a value between 100 to 500 milliseconds. This is required for clients to negotiate 802.11w PMF protection on a WLAN.

  5. Click Save & Apply to Device.

802.11w PMF is enabled with the parameters you selected. This strengthens the security of management frames on the WLAN.


Configure 802.11w (CLI)

Configuring 802.11w improves security for management frames on wireless LANs.
Enable 802.11w Protected Management Frames (PMF) on a WLAN using CLI commands.

Before you begin

  • Configure WPA.

  • Configure AKM (Authentication and Key Management) on the WLAN.

Procedure

  1. Enter global configuration mode.

    Example:

    Device# configure terminal
  2. Configure a WLAN and enters configuration mode.

    Example:

    Device(config)# wlan profile-name wlan-id ssid
  3. Configure 802.1x support using the security wpa akm dot1x-sha256 command.

    Example:

    Device(config-wlan)#security wpa akm dot1x-sha256
  4. Configure the 802.11w association comeback time.

    Example:

    Device(config-wlan)# security pmf association-comeback comeback-interval  

    Example:

    Device(config-wlan)# security pmf association-comeback 10  
  5. Require clients to negotiate 802.11w PMF protection on a WLAN.

    Example:

    Device(config-wlan)# security pmf mandatory  
  6. Configure time interval identified in milliseconds before which the SA query response is expected.

    Example:

    Device(config-wlan)# security pmf saquery-retry-time timeout  

    Example:

    Device(config-wlan)# security pmf saquery-retry-time 100  

    If the device does not get a response, another SQ query is tried.

802.11w Protected Management Frames are enabled and mandatory on the specified WLAN, providing improved protection of management frames.


Disable 802.11w

Disabling 802.11w may be necessary for compatibility with legacy or non-compliant devices.
Prevent wireless clients from using 802.11w Protected Management Frames on a specified WLAN.

Procedure

  1. Enter global configuration mode.

    Example:

    Device# configure terminal
  2. Configure a WLAN and enters configuration mode.

    Example:

    Device(config)# wlan profile-name wlan-id ssid
  3. Disable 802.1x support using the no security wpa akm dot1x-sha256 command.

    Example:

    Device(config-wlan)# no security wpa akm dot1x-sha256
  4. Configure the 802.11w association comeback time.

    Example:

    Device(config-wlan)# security pmf association-comeback comeback-interval  
    Device(config-wlan)# security pmf association-comeback 10  
  5. Disable client negotiation of 802.11w PMF protection on a WLAN.

    Example:

    Device(config-wlan)# no security pmf mandatory  
  6. Disable SQ query retry.

    Example:

    Device(config-wlan)# no security pmf saquery-retry-time 100  

802.11w PMF protection is disabled for the specified WLAN.


Monitor 802.11w

Use these commands to monitor 802.11w.

Procedure

  1. Display the WLAN parameters on the WLAN.

    The PMF parameters are displayed.

    Device# show wlan name wlan-name
                            . . . . 
                            . . . .        
                            Auth Key Management
                            802.1x                             : Disabled
                            PSK                                : Disabled
                            CCKM                               : Disabled
                            FT dot1x                           : Disabled
                            FT PSK                             : Disabled
                            FT SAE                             : Disabled
                            Dot1x-SHA256                       : Enabled
                            PSK-SHA256                         : Disabled
                            SAE                                : Disabled
                            OWE                                : Disabled
                            SUITEB-1X                          : Disabled
                            SUITEB192-1X                       : Disabled
                            CCKM TSF Tolerance                         : 1000
                            FT Support                                 : Adaptive
                            FT Reassociation Timeout               : 20
                            FT Over-The-DS mode                    : Enabled
                            PMF Support                                : Required
                            PMF Association Comeback Timeout       : 1
                            PMF SA Query Time                      : 500
                            . . . . 
                            . . . . 
                        
  2. Display the summary of the 802.11w authentication key management configuration on a client.

    Device# show wireless client mac-address mac-address detail
                            . . . . 
                            . . . .        
                            Policy Manager State: Run
                            NPU Fast Fast Notified : No
                            Last Policy Manager State : IP Learn Complete
                            Client Entry Create Time : 497 seconds
                            Policy Type : WPA2
                            Encryption Cipher : CCMP (AES)
                            Authentication Key Management : 802.1x-SHA256
                            Encrypted Traffic Analytics : No
                            Management Frame Protection : No
                            Protected Management Frame - 802.11w : Yes
                            EAP Type : LEAP
                            VLAN : 39
                            Multicast VLAN : 0
                            Access VLAN : 39
                            Anchor VLAN : 0
                            WFD capable : No
                            Manged WFD capable : No
                            . . . . 
                            . . . .