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Cisco Wireless LAN Controller Configuration Guide
OL-17037-01
Chapter 7 Controlling Lightweight Access Points
Configuring Probe Request Forwarding
Step 9
To see a summary of all access points in monitor mode, enter this command:
show ap monitor-mode summary
Information similar to the following appears:
AP Name
Ethernet MAC Status Scanning Channel List
------------------ -------------------- ---------- ------------------------
AP1131:46f2.98ac 00:16:46:f2:98:ac Tracking 1, 6, NA, NA
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 location accuracy.
Using the controller CLI, follow these steps to configure probe request filtering and rate limiting.
Step 1
To enable or disable the filtering of probe requests forwarded from an access point to the controller, enter
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
To limit the number of probe requests sent to the controller per client per access point radio in a given
interval, enter this command:
config advanced probe limit
num_probes
interval
•
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
To save your changes, enter this command:
save config
Step 4
To view the probe request forwarding configuration, enter 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
