Manage domain controller discovery

Contributors

Beginning in ONTAP 9.3, you can modify the default process by which domain controllers (DCs) are discovered. This enables you to limit discovery to your site or to a pool of preferred DCs, which can lead to performance improvements depending on the environment.

About this task

By default, the dynamic discovery process discovers all available DCs, including any preferred DCs, all DCs in the local site, and all remote DCs. This configuration can lead to latency in authentication and accessing shares in certain environments. If you have already determined the pool of DCs that you want to use, or if the remote DCs are inadequate or inaccessible, you can change the discovery method.

In ONTAP 9.3 and later releases, the discovery-mode parameter of the cifs domain discovered-servers command enables you to select one of the following discovery options:

  • All DCs in the domain are discovered.

  • Only DCs in the local site are discovered.

    The default-site parameter for the SMB server must be defined to use this mode.

  • Server discovery is not performed, the SMB server configuration depends only on preferred DCs.

    To use this mode, you must first define the preferred DCs for the SMB server.

Step
  1. Specify the desired discovery option: vserver cifs domain discovered-servers discovery-mode modify -vserver vserver_name -mode {all|site|none}

    Options for the mode parameter:

    • all

      Discover all available DCs (default).

    • site

      Limit DC discovery to your site.

    • none

      Use only preferred DCs and not perform discovery.