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
Digital Certificates
■ Precision—the precision (accuracy) of the Wireless Edge Services xl
Module’s time clock, in Hz
The values that normally are displayed in this field range from -6 for mains-
frequency clocks to -20 for microsecond clocks found in some worksta-
tions.
■ Reference time—the timestamp at which the local clock was last set or
corrected
■ Clock Offset—the calculated offset, in seconds, between the module and
the source
The module adjusts its clock to match the server’s time value. The offset
gravitates toward zero over time, but is never completely reduced to zero.
■ Root delay—the total round-trip delay, in seconds
This variable can take on both positive and negative values, depending on
the relative time and frequency offsets. The values that normally are
displayed in this field range from negative values of a few milliseconds to
positive values of several hundred milliseconds.
■ Root Dispersion—the nominal error relative to the primary time source, in
seconds
The values that normally are displayed in this field range from 0 through
several hundred milliseconds.
Digital Certificates
The Wireless Edge Services xl Module supports digital certificates, which are
used to identify a host uniquely.
The Wireless Edge Services xl Module uses certificates for several purposes:
■ HTTPS access—The module’s server certificate authenticates the mod-
ule to your Web browser.
■ RADIUS authentication services—802.1X authentication with Exten-
sible Authentication Protocol (EAP) requires mutual authentication. In
other words, the module’s RADIUS authentication server must send a
server certificate and authenticate to supplicants.
■ Autokey authentication for secure NTP—The module sends its cer-
tificate to the secure NTP server to authenticate itself and generate keys
to secure NTP exchanges.