You must provide a set of external services before you deploy the components of this VMware Validated Design. External Services Overview for Consolidated SDDCExternal services include Active Directory, DHCP, DNS, NTP, SMTP Mail Relay, FTP, and certificate services. Physical Network Requirements for Consolidated SDDCBefore you start deploying the Consolidated SDDC, provide certain physical network configuration. VLANs, IP Subnets, and Application Virtual Networks for Consolidated SDDCBefore you start deploying the Consolidated SDDC, you must allocate VLANs and IP subnets to the different types of traffic in the SDDC, such as ESXi management, vSphere vMotion, and others. For application virtual networks, you must plan separate IP subnets for these networks. Host Names and IP Addresses for Consolidated SDDCBefore you deploy the Consolidated SDDC following this validated design, you must define the host names and IP addresses for the each of the management components deployed. Some of these host names must also be configured in DNS with fully qualified domain names (FQDNs) that map them to the IP addresses. Time Synchronization for Consolidated SDDCConfigure a common NTP server source for synchronized operation of vCenter Single Sign-On and log correlation. Active Directory Users and Groups for Consolidated SDDCBefore you deploy and configure the Consolidated SDDC in this validated design, you must provide a specific configuration of Active Directory users and groups. You use these users and groups for application login, for assigning roles in a tenant organization and for authentication in cross-application communication. Certificate Replacement for Consolidated SDDCBefore you deploy the Consolidated SDDC, you must configure a certificate authority and generate certificate files for the management products. According to this validated design you replace the default VMCA or self-signed certificates of the SDDC management products with certificates that are signed by a Certificate Authority (CA) during deployment. Datastore RequirementsFor certain features of the SDDC components, such as backup and restore and log archiving, you must provide secondary storage.