本文档陈述Agent扩展的详细设计。 Agent扩展使用第三方工具net-snmp来扩展，该工具提供了扩展Agent所需的API，并且提供了3种扩展Agent的方法-Agent statements in this document the detailed design of the expansion. Agent to expand the use of third-party tools to expand the net-snmp, the tool provides the Agent required for the expansion of API, and provides three kinds of ways to expand the Agent