FAILURE: Unable to contact DNS to discover domain controllers

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Category:: ontap-9

Specialty:: NAS

Last Updated:

Applies to

ONTAP 9
CIFS/SMB

Issue

Some operations require that ONTAP connects 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.