Information Technology Reference
In-Depth Information
Figure 2.15
Specifying NTP
servers allows
ESXi to auto-
matically keep time
synchronized.
8.
Check the box marked Restart NTP Service To Apply Changes; then click OK.
9.
Click OK to return to the vSphere Client. The Time Coni guration area will update to
show the new NTP servers.
You'll note that using the vSphere Client to enable NTP this way also automatically enables
NTP trafi c through the i rewall. You can verify this by noting an Open Firewall Ports entry in
the Tasks pane or by clicking Security Proi le under the Software menu and seeing an entry for
NTP Client listed under Outgoing Connections.
Windows as a Reliable Time Server
You can confi gure an existing Windows server as a reliable time server by performing these steps:
1.
Use the Group Policy Object editor to navigate to Administrative Templates
➢
➢
System
Windows
➢
Time Providers.
2.
Select the Enable Windows NTP Server Group Policy option.
3.
Navigate to Administrative Templates
Time Service
➢
➢
Windows Time Service.
4.
Double-click the Global Confi guration Settings option, and select the Enabled radio button.
5.
Set the AnnounceFlags option to 4.
6.
Click the OK button.
System
Confi guring Name Resolution
Just as we mentioned that time synchronization is important for your vSphere environment, so
is name resolution. Although the vSphere dependency on name resolution is less than it was,
there is still some functionality that may not work as expected without proper name resolution.
Coni guring name resolution is a simple process in the vSphere Client:
1.
Use the vSphere Client to connect directly to the ESXi host (or to a vCenter Server instal-
lation, if you have vCenter Server running at this point).
