EMS で LDAP エラーが繰り返し発生しています

環境

ONTAP 9

問題

• EMSで  次のテキストとともにsecd.ldap.noServersエラーが報告される

None of the LDAP servers configured for Vserver (svm0) are currently accessible via the network for LDAP service type
(Service: LDAP (NIS & Name Mapping), Operation: GetUserInfoFromName).

• 後続の SecD.unexpectedFailure EMSが表示されます。 

Wed Oct 05 12:00:00 +0000 [cluster-01: secd: secd.unexpectedFailure:debug]: Unexpected SecD failure in Vserver "svm0".
Details: Error: Ldap get list of groups for a user procedure failed
[3001 ms] Failed to initiate Kerberos authentication. Trying NTLM.
**[ 10013] FAILURE: Could not authenticate as 'users@DOMAIN.LOCAL': Unknown user (KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN)
[ 13014] Unable to start LDAPS: Timed out
[ 13014] Unable to connect to LDAP (NIS & Name Mapping) service on ldap01.domain.local (Error: Timed out)
[ 13014] No servers available for LDAP_NIS_AND_NAME_MAPPING, vserver: 4, domain: .
[ 13014] Unable to make a connection (LDAP (NIS & Name Mapping):), result: 6940
[ 13020] Retry requested, but the retry window (7000 ms) has expired; giving up.