Installation guide

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Wi-Fi Location-Based Services—Design and Deployment Considerations
OL-11612-01
Installation and Configuration
Figure 29 Specifying Location Server Application Login Credentials in WCS
Location Appliance Time Synchronization
With the advent of location notifications in Release 2.0 of the location appliance, ensuring proper time
synchronization of the location appliances in your network has become an increasingly important issue.
Having coordinated system time across network components has always made troubleshooting easier,
especially when multiple syslogs or /var/log/messages component files must be viewed across multiple
systems. However, notification messages that are transmitted by the location server (such as e-mail
messages) also contain time stamps that are based on the operating system time of the location appliance.
Location appliances that are configured with the incorrect system time issue notification messages that
appear confusing (as shown in Figure 30) when received at network operations centers (NOCs) or other
control points. This is especially annoying when multiple location appliances are under the control of a
single management domain.
Figure 30 Email Notification Message Bearing Time Stamp of Location Appliance
To eliminate this, Cisco recommends that the location server be configured to use Network Time
Protocol (NTP) to synchronize system clocks with a single coordinated time source. The location
appliance contains an NTPD daemon utility that can act as an NTP client to an external NTP server