You must prepare your infrastructure and follow the task sequence provided in the checklist for the upgrade process to be successful. Perform the upgrade process in a maintenance time frame defined by your company. Operational Impact of the NSX-T UpgradeThe duration for the NSX-T upgrade process depends on the number of components you have to upgrade in your infrastructure. It is important to understand the operational state of NSX-T components during an upgrade, such as when some hosts have been upgraded, or when NSX Edge nodes have not been upgraded. Supported Hypervisor Upgrade PathThe supported hypervisor upgrade paths from NSX-T 1.1 to NSX-T 2.0. Upgrade ESXi 6.0 Host to ESXi 6.5 GA HostDepending on your environment you must manually upgrade the ESXi host from ESXi 6.0 to ESXi 6.5 GA version. Upgrade Ubuntu KVM HostDepending on your environment you must manually upgrade the Ubuntu 14.04 to 16.04 version. Verify the Current State of NSX-TBefore you begin the upgrade process, it is important to test the NSX-T working state. Otherwise, you cannot determine if the upgrade caused post-upgrade problems or if the problem existed before the upgrade. Download the NSX-T Upgrade BundleThe upgrade bundle contains all the files to upgrade the NSX-T infrastructure. Before you begin the upgrade process, you must download the correct upgrade bundle version. Verify Upgrade Coordinator StatusThe upgrade coordinator is a self-contained Web application that orchestrates the upgrade process of different NSX-T components.