6.0.1

6 Click OK.
Synchronizing Clocks on the vSphere Network
Make sure that all components on the vSphere network have their clocks synchronized. If the clocks on the
machines in your vSphere network are not synchronized, SSL certicates, which are time-sensitive, might
not be recognized as valid in communications between network machines.
Unsynchronized clocks can result in authentication problems, which can cause the installation to fail or
prevent the vCenter Server Appliance vpxd service from starting.
Make sure any Windows host machine on which a vCenter component runs is synchronized with the NTP
server. See the Knowledge Base article hp://kb.vmware.com/kb/1318.
Edit Time Configuration for a Host
You can congure the time seings on a host manually, or you can synchronize the time and date of the host
by using an NTP server.
Procedure
1 In the vSphere Web Client, navigate to the host in the vSphere inventory.
2 Select Manage, and select .
3 Under System, select Time  and click Edit.
4 Select an option for seing the time and date of the host.
Option Description
Manually configure the date and
time on this host
Set the time and date for the host manually.
Use Network Time Protocol (Enable
NTP client)
Synchronize the time and date of the host with an NTP server. The NTP
service on the host periodically takes the time and date from the NTP
server.
a In the NTP Servers text box, type the IP addresses or host names of the
NTP servers that you want to use.
b From the NTP Service Startup Policy drop-down list, select an option
for starting and stopping the NTP service on the host.
n
Start and stop with port usage - Starts or stops the NTP service
when the NTP client port is enabled or disabled for access in the
security prole of the host.
n
Start and stop with host - Starts and stops the NTP service when
the host powers on or shuts down.
n
Start and stop manually - Enables manual starting and stopping
of the NTP service.
You can use the Start, Stop, or Restart buons to control the status of the
NTP service on the host manually at any time no maer of the selected
startup policy for the NTP service. For the Start and stop manually policy,
you always use the buons to control the status of the NTP service.
5 Click OK.
Chapter 3 Configuring Hosts and vCenter Server
VMware, Inc. 39