On slapd.conf there are multiple Cipher Suites defined, but LDAP is just using only the last one listed. The following Cipher Suites are defined:
TLSCipherSuite TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384
TLSCipherSuite TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
TLSCipherSuite TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
TLSCipherSuite TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLSCipherSuite TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
TLSCipherSuite TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
What is needed for LDAP to read all the defined Cipher Suites?
Release : 15.1
Component : LDAP Server
The Cipher Suites need to be on the same line and separated by a colon.
Example:
TLSCipherSuite TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384:TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
Also, make sure that the PTF SO11230 is applied.