RFC 2249 (rfc2249) - Page 2 of 28
Mail Monitoring MIB
Alternative Format: Original Text Document
RFC 2249 Mail Monitoring MIB January 1998 3. The SNMPv2 Network Management Framework The SNMPv2 Network Management Framework consists of seven major components. They are: o RFC 1902 [1] which defines the SMI, the mechanisms used for describing and naming objects for the purpose of management. o RFC 1903 [2] defines textual conventions for SNMPv2. o RFC 1904 [3] defines conformance statements for SNMPv2. o RFC 1905 [4] defines transport mappings for SNMPv2. o RFC 1906 [5] defines the protocol operations used for network access to managed objects. o RFC 1907 [6] defines the Management Information Base for SNMPv2. o RFC 1908 [7] specifies coexistance between SNMP and SNMPv2. The Framework permits new objects to be defined for the purpose of experimentation and evaluation. 3.1. Object Definitions Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the subset of Abstract Syntax Notation One (ASN.1) defined in the SMI. In particular, each object type is named by an OBJECT IDENTIFIER, an administratively assigned name. The object type together with an object instance serves to uniquely identify a specific instantiation of the object. For human convenience, we often use a textual string, termed the descriptor, to refer to the object type. 4. Message Flow Model A general model of message flow inside an MTA has to be presented before a MIB can be described. Generally speaking, message flow is modelled as occuring in four steps: (1) Messages are received by the MTA from User Agents, Message Stores, other MTAs, and gateways. (2) The "next hop" for the each message is determined. This is simply the destination the message is to be transmitted to; it may or may not be the final destination of the message. Freed & Kille Standards Track
