Novell OPEN ENTERPRISE SERVER 2 SP2 - ADMINISTRATION, Руководство по внедрению, Страница: 106 / 288

106 OES 2 SP2: Planning and Implementation Guide
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“Time Synchronization for Trees with More Than Thirty Servers” on page 106
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“Time Synchronization across Geographical Boundaries” on page 106
Time Synchronization for Trees with Fewer Than Thirty Servers
If your tree will have fewer than thirty servers, the default installation settings for time
synchronization should be sufficient for all of the servers except the first server installed in the tree.
You should configure the first server in the tree to obtain time from one or more time sources that are
external to the tree. (See
Step 1 in “Planning a Time Synchronization Hierarchy before Installing
OES” on page 107 .)
All other servers should point to the first server in the tree for their time synchronization needs.
Time Synchronization for Trees with More Than Thirty Servers
If your tree will have more than thirty servers, you need to plan and configure your servers with time
synchronization roles that match your network architecture and time synchronization strategy.
Example roles might include the following:
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Servers that receive time from external time sources and send packets to other servers further
down in the hierarchy
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Servers that communicate with other servers in peer-to-peer relationships to ensure that they
are synchronized
Basic planning steps are summarized in “Planning a Time Synchronization Hierarchy before
Installing OES” on page 107 .
Refer to the following sources for additional help in planning time server roles:
Š
“ Configuring Timesync on Servers ” in the NW 6.5 SP8: Network Time Synchronization
Administration Guide
Š “ Modes of Time Synchronization ” in the NW 6.5 SP8: NTP Administration Guide
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NTP information on the Web (http://www.cis.udel.edu/~mills/ntp.html)
Time Synchronization across Geographical Boundaries
If the servers in the tree will reside at multiple geographic sites, you need to plan how to synchronize
time for the entire network while minimizing network traffic. For more information, see “
Wide Area
Configuration ” in the NW 6.5 SP8: NTP Administration Guide .
Choose Timesync for Virtualized NetWare Only
When you install a virtualized NetWare 6.5 server, you should always use Timesync and configure it
to communicate using NTP. For more information, see “
You Must Use Timesync for Time
Synchronization ” in the OES 2 SP2: Installation Guide .
The dialog box that lets you choose between Timesync and NTP is available as an advanced option
in the Time Zone panel during the NetWare installation. Choosing between Timesync and NTP is
documented in “
Setting the Server Time Zone and Time Synchronization Method ” in the NW65
SP8: Installation Guide .