Orolia VersaSync User Manual

Data
Name
Data Description Range Resolution Units
Seconds Seconds since epoch (00:00:00 Jan
1, 1970 UTC)
Unsigned 32 bit
integer
1 Seconds
NSec NSec within the current second Unsigned 32 bit
integer
1 nsec
EOM End-of-message -1 1 n/a
2.8.9 Configure NTP
Network Time Protocol (NTP) and Simple Network Time Protocol (SNTP) are client-
server protocols that are used to synchronize time on IP networks. NTP provides greater
accuracy and better error checking capabilities than SNTP does, but requires more
resources.
For many applications, it is not necessary to modify the NTP factory default configuration
settings. It is possible, however, to change most of the settings in order to support specific
NTP applications which may require a non-standard configuration:
These features include the ability to use either MD5 authentication or NTP Autokey, to
block NTP access to parts of the network and to broadcast NTP data to the network’s
broadcast address. NTP and SNTP are used to synchronize time on any computer equip-
ment compatible with the Network Time Protocol. This includes Cisco routers and
switches, UNIX machines, and Windows machines with suitable clients. To synchronize a
single workstation, several freeware or shareware NTP clients are available on the Internet.
The software running on the PC determines whether NTP or SNTP is used.
When the NTP service is enabled, VersaSync will “listen” for NTP request messages from
NTP clients on the network. When an NTP request packet is received, VersaSync will send
an NTP response time packet to the requesting client. Under typical conditions, VersaSync
can service several thousand NTP requests per second without MD5 authentication
enabled, and at a somewhat lower rate with MD5 authentication enabled.
You can either enable or completely disable the NTP Service. When NTP is disabled, no
NTP time packets will be sent out to the network. When enabled, by default, the NTP Ser-
vice operates in Unicast mode, i.e. the NTP Service responds to NTP requests only.
Note: In order to configure NTP, you need to access the NTP Setup screen
which requires ADMINISTRATORrights.
2.8.9.1 Checklist NTP Configuration
The following is a list of configuration settings you may want to consider as you setup your
NTP Service. (Not all items may apply to your application, or there may be other
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CHAPTER 2 • VersaSync User Manual Rev. 7.0
2.8 Configuring Network Settings

Orolia VersaSync Specifications

General

Brand	Orolia
Model	VersaSync
Category	Server
Language	English