Specifications

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Cisco Wireless LAN Controller Configuration Guide
OL-21524-02
Chapter 4 Configuring Controller Settings
Configuring and Viewing Location Settings
Step 4 Verify that the location appliance certificate is installed on the controller by entering this command:
show auth-list
Information similar to the following appears:
Authorize APs against AAA ....................... disabled
Allow APs with Self-Signed Certificate (SSC) .... disabled
Mac Addr Cert Type Key Hash
----------------------- ---------- --------------------------------------------
00:16:36:91:9a:27 LBS-SSC 593f34e7cb151997a28cc7da2a6cac040b329636
Synchronizing the Controller and Location Appliance
For controller software release 4.2 or later releases, if a location appliance (release 3.1 or later releases)
is installed on your network, the time zone must be set on the controller to ensure proper synchronization
between the two systems. Also, the times must be synchronized on the two devices. We recommend that
you set the time even for networks that do not have location appliances. See the “Configuring 802.11
Bands” section on page 4-26 for instructions on setting the time and date on the controller.
Note The time zone can be different for the controller and the location appliance, but the time zone delta must
be configured accordingly, based on GMT.
Configuring Location Settings
The controller determines the location of client devices by gathering received signal strength indication
(RSSI) measurements from access points all around the client of interest. The controller can obtain
location reports from up to 16 access points for clients, RFID tags, and rogue access points.
Improve location accuracy by configuring the path loss measurement (S60) request for normal clients or
calibrating clients by entering this command:
config location plm ?
where ? is one of the following:
• client {enable | disable} burst_interval—Enables or disables the path loss measurement request for
normal, noncalibrating clients. The valid range for the burst_interval parameter is 1 to 3600
seconds, and the default value is 60 seconds.
• calibrating {enable | disable} {uniband | multiband}—Enables or disables the path loss
measurement request for calibrating clients on the associated 802.11a or 802.11b/g radio or on the
associated 802.11a/b/g radio.
If a client does not send probes often or sends them only on a few channels, its location cannot be
updated or cannot be updated accurately. The config location plm command forces clients to send more
packets on all channels. When a CCXv4 (or higher) client associates, the controller sends it a path loss
measurement request, which instructs the client to transmit on the bands and channels that the access
points are on (typically, channels 1, 6, and 11 for 2.4-GHz-only access points) at a configurable interval
(such as 60 seconds) indefinitely.
These four additional location CLI commands are available; however, they are set to optimal default
values, so we do not recommend that you use or modify them: