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secd.netlogon.noServers error seen with DNS timeout

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ontap-9
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nas
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Applies to

  • ONTAP 9
  • CIFS
  • DNS

Issue

  • Error secd.netlogon.noServers reported in logs as ONTAP is not able to perform srv lookup for domain.
  • CIFS is not accessible during this time
  • EMS reports intermittently:
[node1: secd: secd.dns.server.timed.out:error]: DNS server 10.x.x.x did not respond to vserver = svm01 within timeout interval.
[node1: secd: secd.dns.srv.lookup.failed:error]: DNS server failed to look up service (_ldap._tcp.dc._msdcs.naslab.local) for vserver (svm01) with error (Operation timed out).
[node1: secd: secd.netlogon.noServers:EMERGENCY]: None of the Netlogon servers configured for Vserver (svm01) are currently accessible via the network.
[node1: secd: secd.cifsAuth.problem:error]: vserver (svm01) General CIFS authentication problem. Error: User authentication procedure failed CIFS SMB2 Share mapping - Client Ip = 10.x.x.x   [  0 ms] Login attempt by domain user 'domain/user1' using NTLMv2 style security   [  2014] Failed to connect to 10.x.x.x for DNS via Source Address 10.x.x.x: Operation timed out **[  5351] FAILURE: Unable to contact DNS to discover domain controllers.   [  5351] Unable to make a connection (NetLogon:naslab.local), result: 6812   [  5357] CIFS authentication failed
  • Verify if DNS server is reachable and able to respond
    • ::> vserver service name-service dns check -vserver vs_name
    • ::*> vserver services access-check dns srv-lookup -vserver vs_name -node node-01 -lookup-string  <lookup_string>
  • Packet trace collected shows no response received from DNS server when doing DNS lookup.​​​​

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