AP-51xx Access Point Product Reference Guide
4-46
5.
If using an NTP server to supply system time to the access point, configure the
NTP Server
Configuration
field to define the server network address information required to acquire
the access point network time.
6.
Click
Apply
to save any changes to the Date and time Settings screen. Navigating away
from the screen without clicking the Apply button results in all changes to the screen being
lost.
7.
Click
Undo Changes
(if necessary) to undo any changes made. Undo Changes reverts the
settings displayed on Date and Time Settings screen to the last saved configuration.
CAUTION
If using the Radius time-based authentication feature to authenticate
access point user permissions, ensure
UTC
has been selected from
the
Time Zone
field. If UTC is not selected, time based authentication
will not work properly. For information on configuring Radius
time-based authentication, see
Defining User Access Permissions by
Group on page 6-76
.
Enable NTP on
access
point
Select the
Enable NTP on
access point checkbox to allow a
connection between the access point and one or more specified
NTP servers. A preferred, first alternate and second alternate NTP
server cannot be defined unless this checkbox is selected.
Disable this option (uncheck the checkbox) if Kerberos is not in use
and time synchronization is not necessary.
Preferred Time Server
Specify the numerical (non DNS name) IP address and port of the
primary NTP server. The default port is 123.
First Alternate Time
Server
Optionally, specify the numerical (non DNS name) IP address and
port of an alternative NTP server to use for time synchronization if
the primary NTP server goes down.
Second Alternate
Time Server
Optionally, specify the numerical (non DNS name) and port of yet
another NTP server for the greatest assurance of uninterrupted
time synchronization.
Synchronization
Interval
Define an interval in minutes the access point uses to synchronize
its system time with the NTP server. A synchronization interval
value from 15 minutes to 65535 minutes can be specified. For
implementations using Kerberos, a synchronization interval of 15
minutes (default interval) or sooner is recommended.
!
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