Definitions of Managed Objects for Character Stream Devices using SMIv2
RFC 1658
Document | Type |
RFC - Draft Standard
(July 1994; No errata)
Obsoletes RFC 1316
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Author | Bob Stewart | ||
Last updated | 2013-03-02 | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 1658 (Draft Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | (None) | ||
Send notices to | (None) |
Network Working Group B. Stewart Request for Comments: 1658 Xyplex, Inc. Obsoletes: 1316 July 1994 Category: Standards Track Definitions of Managed Objects for Character Stream Devices using SMIv2 Status of this Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Table of Contents 1. Introduction ................................................ 2 2. The SNMPv2 Network Management Framework ..................... 2 2.1 Object Definitions ......................................... 3 3. Overview .................................................... 3 3.1 Relationship to Interface MIB .............................. 4 4. Definitions ................................................. 4 5. Acknowledgements ............................................ 17 6. References .................................................. 17 7. Security Considerations ..................................... 18 8. Author's Address ............................................ 18 1. Introduction This memo defines an extension to the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it defines objects for the management of character stream devices. 2. The SNMPv2 Network Management Framework The SNMPv2 Network Management Framework consists of four major components. They are: o RFC 1442 [1] which defines the SMI, the mechanisms used for describing and naming objects for the purpose of management. o STD 17, RFC 1213 [2] defines MIB-II, the core set of managed objects for the Internet suite of protocols. Stewart [Page 1] RFC 1658 Character MIB July 1994 o RFC 1445 [3] which defines the administrative and other architectural aspects of the framework. o RFC 1448 [4] which defines the protocol used for network access to managed objects. The Framework permits new objects to be defined for the purpose of experimentation and evaluation. 2.1. 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 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. 3. Overview The Character MIB applies to ports that carry a character stream, whether physical or virtual, serial or parallel, synchronous or asynchronous. The most common example of a character stream device is a hardware terminal port with an RS-232 interface. Another common hardware example is a parallel printer port, say with a Centronics interface. The concept also includes virtual terminal ports, such as a software connection point for a remote console. The Character MIB is mandatory for all systems that offer character stream ports. This includes, for example, terminal servers, general-purpose time-sharing hosts, and even such systems as a bridge with a (virtual) console port. It may or may not include character ports that do not support network sessions, depending on the system's needs. The Character MIB's central abstraction is a port. Physical ports have a one-to-one correspondence with hardware ports. Virtual ports are software entities analogous to physical ports, but with no hardware connector. Each port supports one or more sessions. A session represents a virtual connection that carries characters between the port and some partner. Sessions typically operate over a stack of network protocols. A typical session, for example, uses Telnet over TCP. Stewart [Page 2] RFC 1658 Character MIB July 1994 The MIB comprises one base object and two tables, detailed in the following sections. The tables contain objects for ports and sessions. The MIB intentionally contains no distinction between what is often called permanent and operational or volatile data bases. For theShow full document text