Network time protocol (NTP) service is essential to some of the more complex Address Manager functions, such as xHA and DHCP failover, and differential
deployment.
A specific external time reference is also essential to some organizations for
reports and compliance tracking. The NTP services on Address Manager act as
both a source of NTP synchronization for clients and as clients themselves to
another NTP service that synchronizes the clock reference they provide.
To configure NTP on the Address Manager server:
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Select the Administration tab. Tabs remember the
page you last worked on, so select the tab again to ensure you're on the
Administration page.
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Under General, click Service
Configuration.
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From the Service Type drop-down menu, select Network
Time Protocol (NTP).
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Under General Settings, set the following
parameters:
- Enable NTP Service—select this check box to
enable the NTP service; deselect this check box to disable the NTP
service.
- NTP Server—enter the fully-qualified domain name
or IP address for a remote NTP server from which Address Manager
or BDDS will reference the time.
- Stratum—select a stratum value for the NTP server
being added. This value will be associated to an individual NTP server
specified in the NTP Server field. Select
Default to use the stratum value set on the remote NTP
server.
Note: Stratum values
indicate the hierarchy level for the NTP server, which is the
number of servers to a reference clock. This is used by the NTP
client to avoid synchronization loops by preferring servers with
a lower stratum.
-
Click Add to associate a stratum value to a server and
add them to the list. To remove a server, select it from the list and click
Remove. The top-most NTP server will be queried
first, then the second, and continues down the list. To change the order of
servers in the list, select a server in the list and click Move
up or Move down.
Note: By default, the NTP Server list
contains at least the following IP addresses:
- DNS/DHCP ServerNTP list:
- the IP address for the Address Manager
appliance managing the DNS/DHCP Server
- Address Manager NTP list:
- the Local Reference Clock (127.127.1.0) on the
connected server.
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Click Update.