专家讲解：snmp原理讲义.ppt

Introduction to SNMP Yen-Cheng Chen .tw/~ycchen/ yencheng@.tw Contents 1. Basic Concepts 2. Management Information Base 3. Simple Network Management Protocol 4. SNMP Application Examples 5. Reference Appendix: ASN.1 Concept 1. Basic Concepts 網路管理標準化 如果每個廠商的網路設備均提供一套獨特專屬(Proprietary)的網管方法與介面，網路管理工作將很難執行。 網路管理標準化 每個網路設備必須提供一致的網路管理介面(亦即相同的網路管理通信協定)。 網路管理相關標準 Internet SNMPv1, SNMPv2, SNMPv3 ISO/ITU-T X.700 Series: CMIP/S (Common Management Information Protocol / Service) ITU-T M.3000 Series: TMN (Telecommunication Management Networks) SNMP Concepts SNMP: Simple Network Management Protocol De facto standards of network management for TCP/IP networks (Internet) IAB recommends all IP TCP implementations should be network manageable. That is, all TCP/IP network devices should support SNMP. SNMP Architectural Model Key Components One or more Management Stations Perform management applications, i.e, Monitor Control. Multiple Network Elements hosts, routers, gateways, ..., which each contain an Agent. Network Management Protocol Exchange network management information. SNMP Architectural Model (cont.) Management Components Manager Agent Network Management Protocol Management Information Base (MIB) Management Components Management Station (Manager) Network management applications. Provide an interface which the human network manager can monitor and control the network. Agent Network devices should be equipped with agent software so that they can be managed from a management station. Responds to requests for information from managers. Responds to requests for actions from managers. May asynchronously provide managers with important but unsolicited information. Management Components (cont.) Network Management Protocol Communication protocol between managers and agents NM protocol provides a standard way to exchange management information between managers and agents. Management Information Base (MIB) A collection of Managed Objects. The resources to be managed are repres