Cisco WIRELESS LAN CONTROLLER OL-17037-01 User Manual download pdf (Page 63)

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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

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Cisco WIRELESS LAN CONTROLLER OL-17037-01 User Manual Page 63