You can log in to the Appliance Management Interface of a vCenter Server Appliance that contains a vCenter Server with an embedded Platform Services Controller, a vCenter Server with an external Platform Services Controller, or a Platform Services Controller to view the installed patches, check for new patches and install them, and configure automatic checks for available patches.
To perform ISO-based patching, you download an ISO image, attach the ISO image to the CD/DVD drive of the appliance, check for available patches in the ISO image, and install the patches.
To perform URL-based patching, you check for available patches in a repository URL and install the patches. The vCenter Server Appliance is preset with a default VMware repository URL for the build profile of the appliance. You can configure the appliance to use the default VMware repository URL or a custom repository URL, for example, a repository URL that you previously built on a local Web server running within your data center.