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3.4.4.1 DemotedToBackupDomainController

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If a domain master browser server is demoted from a primary domain controller (PDC) to a backup domain controller (BDC), it performs the following actions:

  • The server MUST unregister the NetBIOS unique name <domain>[0x1D].

  • The server MUST disable advertising of the domain master service as specified in [MS-SRVS] section 3.1.6.10, passing SV_TYPE_DOMAIN_MASTER as the input parameter.

  • The server MUST unregister the NetBIOS unique name <domain>[0x1B] as part of the demotion of a PDC, as specified in [MS-ADTS] section 6.3.4 (NetBIOS Broadcast and NBNS Background).

  • The server MUST cancel the Local Master Browser Server Expiration Timer.

  • The server MUST initialize the Master List of Servers to an empty list.

  • The server MUST initialize the Master List of Machine Groups to an empty list.

  • The server MUST initialize the Local Master Browser Servers List to an empty list.

Upon completion of these actions, the server is no longer a domain master browser server. The server MUST then force an election by sending a RequestElection frame as specified in section 3.3.5.11.