To ensure system security, you are advised to use the key authentication mode to authorize the user who attempts to log in to a Linux BMS. Therefore, you must use an existing key pair or create a new one for remote login authentication.
BMSs use networks, including subnets and security groups, provided by a VPC.
If service VMs in the user-defined network need to provide services to the Internet, apply for an EIP. Otherwise, EIP is not required.
Before creating a XenServer BMS, you need to register the XenServer image file as a private image.
For how to register a private image, see Register a Private Image.