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ONTAP System Manager 9.11.1+ shows "ERR_SSL_KEY_USAGE_INCOMPATIBLE" due to unsupported cipher suite

Last Updated:

Applies to

  • ONTAP System Manager 9.11.1 or later
  • Supported cipher suites
  • Certificates created pre ONTAP 9.12.1


  • ONTAP System Manager shows "ERR_SSL_KEY_USAGE_INCOMPATIBLE" in Chrome after upgrading to 9.11.1P5 or later
  • Error is seen while using a CA signed certificate
  • Firefox allows ONTAP System Manager access but with a warning as SEC_ERROR_UNKNOWN_ISSUER
  • While checking the security info on Firefox, its seen that the cipher suite in use is TLS_AES_128_GCM_SHA256

ONTAP System Manager 9.11.1 shows "ERR_SSL_KEY_USAGE_INCOMPATIBLE" due to unsupported cipher suite

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