Wireless/Redundant Edge Services xl Module Management and Configuration Guide WS.02.xx and greater

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Configuring the ProCurve Wireless Edge Services xl Module
Enabling Secure Network Time Protocol (NTP)
The country code configures the Wireless Edge Services xl Module to choose
legal channels and transmit powers for RP radios. You must set the country
code before the module can adopt RPs. Follow these steps:
1. From the Country drop-down menu, select your country. (See Figure 2-87.)
2. The Wireless Edge Services xl Module OS warns you that you must select
the correct country code. Click the OK button.
3. Click the Apply button.
Enabling Secure Network Time Protocol
(NTP)
Because the Wireless Edge Services xl Module supports NTP, you can config-
ure the module to take its time from an NTP server. This ensures that the
module is always using the correct time, which helps you maintain and
monitor your company’s wireless services. The module can function as a
secure NTP client, which means that it accepts the time only from authenti-
cated sources.
In addition to receiving the time, the Wireless Edge Services xl Module can
act as a secure NTP server for other devices. Receiving a highly accurate time
by communicating with other NTP servers or NTP peers, or both, the module
serves this time to clients.
Secure NTP Overview
NTP is used to synchronize the clocks of computer systems to another server
or reference time source, such as a radio or satellite receiver or modem. NTP
data packets use a 64-bit timestamp to provide a high degree of accuracy
relative to Coordinated Universal Time (UTC). The server might receive its
time via a Global Positioning System (GPS) receiver, for example.
Typical NTP configurations use multiple redundant servers and diverse net-
work paths to ensure accuracy and reliability. The NTP client software runs
continuously in the background and periodically receives updates from one
or more servers. The client software ignores responses from servers that
appear to be sending the wrong time and averages the results from those that
appear to be correct.