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 | 500 msec | |
| Cisco Wireless LAN Controller Configuration Guide |