Configuring Ntp - Spectracom PRISMA VelaSync User Manual

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2.10 Configuring 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 set-
tings. 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 MD5 authentication 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 syn-
chronize time on any computer equipment compatible with the Network Time Protocol. This
includes Cisco routers and switches, UNIX machines, and Windows machines with suitable cli-
ents. To synchronize a single workstation, several freeware or shareware NTP clients are avail-
able on the Internet. The software running on the PC determines whether NTP or SNTP is used.
When the NTP service is enabled, VelaSync will "listen" for NTP request messages from NTP cli-
ents on the network. When an NTP request packet is received, VelaSync will send an NTP
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The Priv Passphrase must be between 8 and 32 characters in length.
Click the Submit button at the bottom of the window. Cancel any changes by clicking the
X -icon in the top-right corner (any information entered will be lost).
The SNMP trap you created will appear in the SNMP Traps panel:
Each row of the SNMP Traps panel includes the version of the SNMP functionality, the
User/Community name for the trap, the IP address/Hostname of the SNMP Manager
and values applicable only to SNMP v3, which include the Engine ID, the Authorization
Type, the Privilege Type.
You may define different SNMP Managers to whom SNMP traps can be sent over the
network. This allows for SNMP Managers in different geographical areas to receive the
same SNMP traps.
Note: Spectracom has been assigned the enterprise identifier 18837 by
the IANA (Internet Assigned Numbers Authority). Spectracom's product
MIBs reside under the enterprise identifier @18837.3.
For detailed descriptions of the objects and traps supported by the VelaSync, please
refer to the Spectracom VelaSync MIB files. See "Accessing the SNMP Support MIB
Files" on page 57.
2.10 Configuring NTP
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