Structure of Management Information
In computing, the Structure of Management Information (SMI), an adapted subset of ASN.1, operates in Simple Network Management Protocol (SNMP) to define sets ("modules") of related managed objects in a Management information base (MIB).
SMI subdivides into three parts: module definitions, object definitions, and notification definitions.
- Module definitions are used when describing information modules. An ASN .1 macro, MODULE-IDENTITY, is used to concisely convey the semantics of an information module.
- Object definitions describe managed objects. An ASN.1 macro, OBJECT-TYPE, is used to concisely convey the syntax and semantics of a managed object.
- Notification definitions (aka "traps") are used when describing unsolicited transmissions of management information. An ASN.1 macro, NOTIFICATION-TYPE, concisely conveys the syntax and semantics of a notification.
libsmi, a C library for accessing MIB information
- RFC 2580, Standard 58, Conformance Statements for SMIv2
- RFC 2579, Standard 58, Textual Conventions for SMIv2
- RFC 2578, Standard 58, Structure of Management Information Version 2 (SMIv2)
- "libsmi - A Library to Access SMI MIB Information". Technical University of Braunschweig. Retrieved 2008-07-31.
The core of the libsmi distribution is a library that allows management applications to access SMI MIB module definitions.