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Cisco 2700 Series Wireless Location Appliance Deployment Guide
OL-8478-01
Troubleshooting Tips Q & A
A.
The network load from location traffic depends on a number of factors:
–
how many devices are present in a given system
–
how many controllers are present
–
what information the location appliance is configured to poll for
–
how frequently polling occurs
Network load associated with the location appliance should not be substantial and is generally not
a cause for concern. However, you may want to further investigate response times and traffic load if
you have very slow WLAN links.
Q.
How do I manage the location appliance?
A.
All configuration and management of the location appliance is performed through WCS, beyond the
initial CLI command-driven location appliance setup.
Q.
What community string does the location appliance use to poll controllers?
A.
The same community strings as WCS. As part of the synchronization, the controller data is pushed
to the location appliance.
Q.
What is required of my wireless LAN architecture to support the location appliance?
A.
The location appliance only works with Cisco Centralized Wireless LAN architecture such as an
LWAPP-enabled infrastructure. Proper placement is imperative to location.
Place the access points close to the perimeter of coverage areas, surrounding the area where tracking
occurs while also allowing ample coverage in the center.
To receive adequate location determination with the location appliance, wireless LAN deployments
must meet a minimum access point density where each device can be detected by no fewer than 3
access points at signals stronger than -85 dBm and stronger.
WCS with location (AIR-WCS-WL-1.0-K9) is required.
Q.
What is the difference between the location provided in WCS versus the location appliance?
A.
The WCS base indicates which access point can detect a given device, as well as the signal strength
at which that device is detected.
WCS with Location (AIR-WCS-WL-1.0-K9) uses advanced RF fingerprinting and can pinpoint a
single device’s location in on-demand fashion.
The location appliance uses the same location method as WCS with location, but it can track up to
1500 devices simultaneously, storing the data for up to 30 days and allowing third-party applications
to leverage device information history for things like asset tracking.
Q.
Do I need client software to locate clients?
A.
Client software is not needed. Because location is directly integrated into the wireless LAN
infrastructure, access points are listening to Wi-Fi devices as they normally would for data, voice,
and other applications.