Installing boot server software
Boot servers provide the environment that is required to rebuild a protected client, including resources such as shared resource trees (SRT). You must have a boot server for each type of client that you want to protect. In addition, you must install the BMR boot server software before you can create SRTs and add resources to them. For more information refer Chapter Configuring BMR.
A NetBackup client that is not be registered as a boot server to the BMR master server, or a boot server that is unable to communicate with the BMR master server is considered a master-less boot server. Out of all the SRT-related operations, only create SRT, export SRT, and delete SRT operations are allowed in case of master-less boot server, as BMR SRT operations require Microsoft's ADK to be available. User can install ADK on a master-less boot server, create an SRT, and export it. This SRT can be imported on any other registered boot server thereby eliminating the need of ADK installation on those boot servers