Cisco Cisco 2700 Series Wireless Location Appliance

This section lists open caveats in location appliance release 2.1.39.0.

The following caveats are open (unresolved) in this release:

CSCsc09186—When you perform a location calibration, the process of taking data points can take 
up to one minute per point if a single controller is unreachable. 

Workaround: Verify that controllers are reachable during calibration or remove those controllers 
that are not accessible.

CSCsc39959—An element search by MAC address or asset information may not reflect all elements 
seen in maps and summary lists, when operating with a release 3.2 WCS and release 1.x location 
appliance.

Workaround: Upgrade the location appliance to release 2.0 or greater.

CSCsd36689—Access points in monitor mode do not detect probing clients as efficiently as they do 
when in local mode. These access points do not track the clients’ RSSI values and do not contribute 
location information to the Location Appliance.

Workaround: Operate in local mode for most efficient operation, if possible.

CSCse13406—On rare occasions, when multiple users are collecting data points for calibration, a 
user attempting to add a data point may see the map image vanish when WCS is resident on a 
Windows OS machine. The following error message may appear, “Unexpected inability to imwrite 
calmodel progress image.” This is a cosmetic issue only. This caveat does not affect functionality.

Workaround: Navigate back to the calibration model and click save again. You can then continue 
to add datapoints.

CSCse34650—After performing a calibration using a CCX compatible client on a floor with 
multiple controllers, it has been observed that some access points do not contribute enough 
calibration data points. This inaccuracy may be reflected on the Location Inspector quality accuracy 
page.

Workaround: There is no known workaround.

CSCse60657—In campus environments of 60 buildings or more with multiple-floors, some 
synchronization errors may occur on the location appliance given the number of image (floor) 
transfers. (Location Appliances are limited to 30 MB for each message transfer.)

Workaround: Limit the number of buildings assigned to each Campus structure.

CSCse76666—When a location server is synchronizing with WCS and both polling and location 
calculation activities are active, a location appliance may go into a state in which no location 
calculations can occur. This intermittent condition can also happen when a heat map is generated. 
The condition does not occur if polling is turned “off.”

Workaround: To prevent this condition from occurring, do the following:

(1) Turn OFF all polling.

(2) Wait for a few minutes, as close to the actual polling interval as possible. (This allows ongoing 
polling and calculation threads time to finish processing). 

(3) Proceed with the synchronization operation.

(4) Turn ON polling. (Continued on next page)