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AIQUM intermittently reports cluster not reachable while using AD user authentication

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Category:
active-iq-unified-manager
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om
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Applies to

  • ActiveIQ Unified Manager (AIQUM) 9.6+
  • ONTAP 9
  • Kerberos authentication

Issue

  • AIQUM triggers alerts as: The cluster <cluster_name> is not reachable. Username or password has changed. Edit the cluster and enter valid username and password
  • The alerts are intermittent in nature
  • Upon checking on the cluster, the credentials appears are correct
  • Additionally, the same issue is visible for the NFS shares accessed by AD credentials from the same cluster
  • ONTAP event logs show:

ERROR       secd.cifsAuth.problem: vserver (ant-ntap-clu28-ads) General CIFS authentication problem. Error: Ontap admin cifs authentication basic procedure failed
  [ 36 ms] Successfully connected to ip <share_IP>, port 88 using TCP
  [    93] Successfully connected to ip <share_IP>, port 88 using TCP
  [   116] Unknown error: 39756032
  [   117] Kerberos authentication failed. Trying NTLM
  [   117] Login attempt by domain user '<domain\user>' using NTLMv2 style security
  [   134] Successfully connected to ip <share_IP>, port 445 using TCP
  [   170] Successfully connected to ip <share_IP>, port 88 using TCP
  [   209] Unknown error: 39756032
  [   209] Kerberos authentication failed with result: 7556.
  [   209] Unable to connect to NetLogon service on <share_name_with_domain> (Error: RESULT_ERROR_SECD_NO_CONNECTIONS_AVAILABLE)
  [   209] No servers available for MS_NETLOGON, vserver: 3, domain: <domain_name>.
**[   209] FAILURE: Unable to make a connection (NetLogon:<domain_name> result: 6940

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