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FAILURE: Unable to contact DNS to discover domain controllers

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ontap-9
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nas
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Applies to

  • ONTAP 9
  • CIFS/SMB

Issue

  • Some operations require that ONTAP connect to an Active Directory domain controller

Examples

  • Creating an AD machine account
  • Addding an AD user account to a local group
  • As a prerequisite to connecting to an AD DC, ONTAP needs to connect to a DNS server to discover the AD DC

If ONTAP cannot connect to a DNS server, the operation will fail, and ONTAP will log FAILURE: Unable to contact DNS to discover domain controllers in EMS and SECD

Examples

Error: Lookup of CIFS account name procedure failed
**[  7061] FAILURE: Unable to contact DNS to discover domain controllers.
[  7062] Unable to make a connection (LSA:AHN.ORG), Result: RESULT_ERROR_DNS_CANT_REACH_SERVER
[  7064] Could not find Windows name 'AHN\APPVNS'
[  7064] CIFS name lookup failed
[  7065] Retry requested, but the retry window (7000 ms) has expired; giving up.
Error when creating - Failed to create the Active Directory machine account "SVM1".
Reason: SecD Error: no server available
Details: Error: Machine account creation procedure failed
[ 0 ms] Trying to create machine account 'SVM1' in 'DOMAIN.COM' for Vserver 'SVM1'
[ 2009] Failed to connect to 1.2.3.4 for DNS via Source Address 1.2.3.5: Operation timed out
[ 4019] FAILURE: Unable to contact DNS to discover domain controllers.
[ 4019] Unable to connect to any (0) domain controllers.
[ 4019] 'NisDomain' configuration not available
[ 4019] NIS configuration not found for Vserver 4
[ 6029] Failed to connect to 1.2.3.6 for DNS via Source Address 1.2.3.5: Operation timed out
[ 6029] Unable to contact DNS to discover domain controllers.
[ 8039] Failed to connect to 1.2.3.7 for DNS via Source Address 1.2.3.5: Operation timed out
[ 8039] Unable to contact DNS to discover domain controllers.
[ 10049] Failed to connect to 1.2.3.8 for DNS via Source Address 1.2.3.5: Operation timed out
[ 10049] Unable to contact DNS to discover domain controllers.
[ 10049] No servers available for MS_LDAP_AD, vserver: 4, domain: DOMAIN.COM.

 

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