If you are planning to use 389-ds-snmp (ldap-agent),
make sure to properly configure: /etc/dirsrv/config/ldap-agent.conf
adding proper 'server' entries, and adding the lines below to
 => /etc/snmp/snmpd.conf
master agent
agentXSocket /var/agentx/master"

To start 389 Directory Server (LDAP service) at boot:"

    rc-update add 389-ds default"