6.7

When a Platform Services Controller instance stops responding, you must manually fail over the
vCenter Server instances that are registered to it. You fail over the instances by repointing them to other
functional Platform Services Controller instances within the same site. See Repoint vCenter Server to
Another External Platform Services Controller in the Same Domain.
Note If your vCenter Single Sign-On domain includes three or more Platform Services Controller
instances, you can manually create a ring topology. A ring topology ensures Platform Services Controller
reliability when one of the instances fails. To create a ring topology, run the /usr/lib/vmware-
vmdir/bin/vdcrepadmin -f createagreement command against the first and last
Platform Services Controller instance that you have deployed.
Platform Services Controller with No Load Balancer Across
vCenter Single Sign-On Sites
Figure 1‑9. Example of Two Joined Pairs of Platform Services Controller Instances Across
Two Sites with No Load Balancer
vCenter Server
Platform Services
Controller
Virtual Machine or
Physical Server
Virtual Machine or
Physical Server
vCenter Server
Platform Services
Controller
Virtual Machine or
Physical Server
Virtual Machine or
Physical Server
vCenter Server
Platform Services
Controller
Virtual Machine or
Physical Server
Virtual Machine or
Physical Server
vCenter Server
Platform Services
Controller
Virtual Machine or
Physical Server
Virtual Machine or
Physical Server
Site 1 Site 2
Your vCenter Single Sign-On domain might span multiple sites. When no load balancer is available, you
can manually repoint vCenter Server from a failed to a functional Platform Services Controller within the
same site. See Repoint vCenter Server to Another External Platform Services Controller in the Same
Domain.
vCenter Enhanced Linked Mode
vCenter Enhanced Linked Mode allows you to log in to any single instance of vCenter Server Appliance
or vCenter Server and view and manage the inventories of all the vCenter Server systems in the group.
You can join up to ten vCenter Server Appliance systems and eight vCenter Server systems with vCenter
Enhanced Linked Mode.
You can create a vCenter Enhanced Linked Mode group only during the deployment of vCenter Server
Appliance or installation of vCenter Server. You cannot create a vCenter Enhanced Linked Mode group
after you install vCenter Server or after you deploy the vCenter Server Appliance.
vCenter Server Installation and Setup
VMware, Inc. 19