LDAP检查失败、并显示错误 No LDAP DN configed.

• ONTAP
• LDAP

• LDAP显示已断开连接。
• LDAP检查失败，并显示以下错误：

  ::> ldap check -vserver SVM

            Vserver: SVM
Client Configuration Name: Client-LDAPS
        LDAP Status: down
    LDAP Status Details: Error: Validate the Ldap configuration procedure failed
    
    **[   245] FAILURE: Unable to make a connection (LDAP (NIS & Name
**      Mapping):), Result: RESULT_ERROR_SECD_NO_SERVER_AVAILABLE
  LDAP DN Status Details: No LDAP DN configure

• SECD日志： 

ERROR      secd.unixLookupFailure: UNIX lookup failure on Vserver (SVM) for client with IP address (xxx.xx.xx.38). Error: Acquire UNIX credentials procedure failed
**********************
**[   64] FAILURE: Unable to make a connection (LDAP (NIS & Name Mapping):), Result: RESULT_ERROR_SECD_NO_SERVER_AVAILABLE
  [   64] Source: LDAP unavailable. Entry for user-id:00000000 not found in any of the available sources
  [   64] Unable to retrieve UNIX username for UID 00000000