You can upgrade toVMware Cloud Foundation 4.3.1 from VMware Cloud Foundation 4.3, 4.2.1, 4.2, 4.1.0.1, or 4.1.

Upgrading to VMware Cloud Foundation 4.3.1 involves the following tasks.
  1. Upgrade the management domain.
    Components in the management domain must be upgraded in the following order:
    1. VMware Cloud Foundation software. See Upgrade VMware Cloud Foundation Software.
    2. vRealize Suite products. See Upgrade vRealize Suite Lifecycle Manager and vRealize Suite Products.
    3. NSX-T Data Center. See Upgrade NSX-T Data Center.
    4. vCenter Server. See Upgrade vCenter Server.
    5. ESXi. See Upgrade ESXi.
  2. Upgrade VI workload domains.
    Components in VI workload domains must be upgraded in the following order:
    1. NSX-T Data Center. See Upgrade NSX-T Data Center.
    2. vCenter Server. See Upgrade vCenter Server.
    3. ESXi. See Upgrade ESXi.