Cisco Wireless LAN Controller Configuration Guide, Release 7.4
Configuring Probe Request Forwarding
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Configuring Probe Request Forwarding

Configuring Probe Request Forwarding

Information About Configuring Probe Request Forwarding

Probe requests are 802.11 management frames sent by clients to request information about the capabilities of SSIDs. By default, access points forward acknowledged probe requests to the controller for processing. Acknowledged probe requests are probe requests for SSIDs that are supported by the access point. If desired, you can configure access points to forward both acknowledged and unacknowledged probe requests to the controller. The controller can use the information from unacknowledged probe requests to improve the location accuracy.

Configuring Probe Request Forwarding (CLI)


    Step 1   Enable or disable the filtering of probe requests forwarded from an access point to the controller by entering this command: config advanced probe filter {enable | disable}

    If you enable probe filtering, the default filter setting, the access point forwards only acknowledged probe requests to the controller. If you disable probe filtering, the access point forwards both acknowledged and unacknowledged probe requests to the controller.

    Step 2   Limit the number of probe requests sent to the controller per client per access point radio in a given interval by entering this command: config advanced probe limit num_probes interval

    where

    • num_probes is the number of probe requests (from 1 to 100) forwarded to the controller per client per access point radio in a given interval.
    • interval is the probe limit interval (from 100 to 10000 milliseconds).

    The default value for num_probes is 2 probe requests, and the default value for interval is 500 milliseconds.

    Step 3   Enter the save config command to save your changes.
    Step 4   See the probe request forwarding configuration by entering this command:

    show advanced probe

    Information similar to the following appears:

    
    Probe request filtering..........................  Enabled
    Probes fwd to controller per client per radio....  2
    Probe request rate-limiting interval..........  500 msec