WESM zl Management and Configuration Guide WT.01.XX and greater

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Configuring the ProCurve Wireless Edge Services zl Module

Enabling Secure Network Time Protocol (NTP)

The country code configures the Wireless Edge Services zl 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.

2. The Wireless Edge Services zl 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 zl 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 zl 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.