6.0.2

Table Of Contents
2 Verify that DNS reverse lookup returns a fully qualied domain name when queried with the IP
address of the vCenter Server.
When you upgrade vCenter Server, the installation of the web server component that supports the
vSphere Web Client fails if the installer cannot look up the fully qualied domain name of the
vCenter Server from its IP address.
Reverse lookup is implemented by using PTR records.
3 If you use DHCP instead of a manually assigned (static) IP address for vCenter Server, make sure that
the vCenter Server computer name is updated in the domain name service (DNS). Test the update by
pinging the computer name.
For example, if the computer name is host-1.company.com, run the following command at the Windows
command prompt:
ping host-1.company.com
If you can ping the computer name, the name is updated in DNS.
4 Ensure that the ESXi host management interface has a valid DNS resolution from the vCenter Server
and all instances of vSphere Web Client. Ensure that the vCenter Server has a valid DNS resolution
from all ESXi hosts and all instances of vSphere Web Client.
5 If you intend to use Active Directory as an identity source, verify that it is set up correctly. The DNS of
the vCenter Single Sign-On Server host machine must contain both lookup and reverse lookup entries
for the domain controller of the Active Directory.
For example, pinging mycompany.com should return the domain controller IP address for mycompany.
Similarly, the ping -a command for that IP address should return the domain controller host name.
Avoid trying to correct name resolution issues by editing the hosts le. Instead, make sure that the DNS
server is correctly set up.
6 Before the upgrade, select the domain user to use for upgrading vCenter Server. Give that domain user
exclusive administrator permission for vCenter Server, not as part of a Windows Administrators group.
Your network is ready for vCenter Server upgrade.
What to do next
Prepare other components of your environment.
Verify Load Balancer Before Upgrading vCenter Server
If you are using a load balancer for high availability for vCenter Single Sign-On, you must verify that it is
supported and congured correctly before upgrading to vCenter Server 6.0.
In environments with less than four vCenter Server systems, VMware typically recommends a single
Platform Services Controller instance and the associated vCenter Single Sign-On service. In larger
environments, consider using multiple Platform Services Controller instances, protected by a network load
balancer. The white paper vCenter Server 6.0 Deployment Guide on the VMware website discusses this setup.
For current information on maximums, see the Conguration Maximums.
See the VMware Knowledge Base article hp://kb.vmware.com/kb/2112736 for a vCenter Single Sign-On
and Platform Services Controller high availability compatibility matrix.
Prerequisites
Procedure
1 Review the vCenter Server 6.0 Deployment Guide documentation for load balancing information.
2 If your load balancer is not supported, replace it with a supported load balancer.
Chapter 3 Before Upgrading vCenter Server
VMware, Inc. 63