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ONTAP EMS Logs show Nblade.cifsNonAesNiBytesProc errors on platforms other than FAS2500s

Last Updated:

Applies to

  • ONTAP 9.6 to ONTAP 9.7P
  • CIFS
  • SMB Signing and/or SMB Encryption
  • FAS or AFF systems except for the FAS2500 series


The Nblade.cifsNonAesNiBytesProc:Excessive SMB3 cryptographic processing load message is seen in the ONTAP event log:

Node: AFF-N1
Time: Tue, May 03 20:44:54 2022 -0400
Severity: ALERT

Message: Nblade.cifsNonAesNiBytesProc: Excessive SMB3 cryptographic processing load (AES-NI instruction set is not supported).

Description: This message occurs when a system with CPUs that do not support the AES-NI instruction set is performing
SMB3 encryption or signing of a large amount of data.
These cryptographic operations can degrade performance severely for both SMB and other system operations.

Corrective Action: Avoid encrypted or signed SMB3 traffic on systems that do not support the AES-NI instruction set.

Source: SMBOffloadPool_00
Sequence#: 1065458


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