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SNMP , a communication protocol between management stations (consoles, for example) and managed objects, (such as routers, gateways, and switches) makes use of MIBs. Components controlled by the management console need a so-called SNMP agent -- a software module that can communicate with the SNMP manager. SNMP uses a specified set of commands and queries. A MIB should contain information on these commands and on the target objects (controllable entities or potential sources of status information) with a view to tuning the network transport to the current needs. Examples of MIB objects include:
RFC 1213 defines these as mandatory: if an environment does not use the atTable (as in the case of DDN-X.25 units) then the atTable simply remains empty. The table object includes, of course, definitions of table entries, atEntry and information about interfaces (''if'') for each atEntry, etc. MIBs are periodically updated to add new functionality, remove ambiguities and to fix defects. These changes are made in conformance to section 10 of RFC 2578. An example of a MIB that has been updated many times is the important set of objects that was originally defined in RFC 1213 "MIB-II". This MIB has since been split up and can be found in MIBs such as RFC 2011 "SNMPv2 Management Information Base for the Internet Protocol using SMIv2", RFC 4022 "Management Information Base for the Transmission Control Protocol (TCP)", RFC 4113 "Management Information Base for the User Datagram Protocol (UDP)", RFC 2863 "The Interfaces Group MIB" and RFC 3418 "Management Information Base (MIB) for the Simple Network Management Protocol (SNMP)". MIBS INDEX
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