SNMPv3 is an industry-standard protocol that was introduced to overcome the limitations of SNMPv2usec. SNMP messages that are generated by SNMP version 3, user security model (SNMPv3 usm) are more structured than the messages generated by SNMPv2usec.
Sun Management Center 3.6 software supports SNMPv3. SNMPv3 enables Sun Management Center agents to communicate with third-party management applications securely.