Definitions of Managed Objects for Parallel-printer-like Hardware Devices using SMIv2

B. Stewart

doi:10.17487/RFC1660

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This is a modified version of the Internet RFC suitable for machine-translating. Original version is available here: RFC1660

DRAFT STANDARD

Network Working Group                                         B. Stewart
Request for Comments: 1660                                  Xyplex, Inc.
Obsoletes: 1318                                                July 1994
Category: Standards Track

Definitions of Managed Objects for Parallel-printer-like Hardware Devices using SMIv2

Status of this Memo

This document specifies an IAB standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "IAB Official Protocol Standards" for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Table of Contents

1. Introduction ............................................... 1
2. The SNMPv2 Network Management Framework .................... 1
2.1 Object Definitions ........................................ 2
3. Overview ................................................... 2
3.1 Relationship to Interface MIB ............................. 2
4. Definitions ................................................ 3
5. Acknowledgements ........................................... 9
6. References ................................................. 9
7. Security Considerations .................................... 10
8. Author's Address ........................................... 10

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 Parallel-printer-like 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.

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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 Parallel-printer-like Hardware Device MIB applies to interface ports that would most probably support the Character MIB. The most common example is Centronics-like printer port.

The Parallel-printer-like Hardware Device MIB is mandatory for all systems that have such a hardware port supporting services managed through some other MIB.

The Parallel-printer-like Hardware Port MIB includes Centronics-like and Data-Products-like parallel physical links with a similar set of control signals.

The MIB contains objects that relate to physical layer connections.

The MIB comprises one base object and three tables, detailed in the following sections. The tables contain objects for ports and input and output control signals.

3.1.  Relationship to Interface MIB

The Parallel-printer-like MIB is one of many MIBs designed for layered use as described in the Interface MIB [5]. In most implementations where it is present, it will be in the lowest interface sublayer, that is, the Parallel-printer-like MIB represents the physical layer, providing service to higher layers such as the Character MIB [6].

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Although it is unlikely that a parallel printer port will actually be used as a network interface, which is the intent of the Interface MIB, the Parallel-printer-like MIB is closely connected to the Character MIB, which can share hardware interfaces with network operation, and relate to the RS-232 MIB [7].

The Interface MIB's ifTestTable and ifRcvAddressTable are not relevant to the Parallel-printer-like MIB.

The Parallel-printer-like MIB is relevant for ifType values para(34) and perhaps others.

The Parallel-printer-like MIB requires the conformance groups ifGeneralGroup, and ifFixedLengthGroup.

Usefulness of error counters in this MIB depends on the octet counters in ifFixedLengthGroup.

4.  Definitions

PARALLEL-MIB DEFINITIONS ::= BEGIN

IMPORTS MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, Counter32, Integer32
FROM SNMPv2-SMI
InterfaceIndex
FROM IF-MIB
transmission
FROM RFC1213-MIB
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF;

para MODULE-IDENTITY
LAST-UPDATED "9405261700Z" ORGANIZATION "IETF Character MIB Working Group" CONTACT-INFO
" Bob Stewart
Postal: Xyplex, Inc.
295 Foster Street Littleton, MA 01460

Tel: 508-952-4816 Fax: 508-952-4887
E-mail: rlstewart@eng.xyplex.com"

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DESCRIPTION
"The MIB module for Parallel-printer-like hardware devices."
::= { transmission 34 }

-- Generic Parallel-printer-like information

paraNumber OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of ports (regardless of their current state) in the Parallel-printer-like port table."
::= { para 1 }

-- the Parallel-printer-like Port table

paraPortTable OBJECT-TYPE SYNTAX SEQUENCE OF ParaPortEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A list of port entries. The number of entries is given by the value of paraNumber."
::= { para 2 }

paraPortEntry OBJECT-TYPE
SYNTAX ParaPortEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION
"Status and parameter values for a port."
INDEX { paraPortIndex } ::= { paraPortTable 1 }

ParaPortEntry ::=
SEQUENCE {
paraPortIndex
InterfaceIndex,
paraPortType
INTEGER,
paraPortInSigNumber
Integer32,
paraPortOutSigNumber
Integer32
}

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paraPortIndex OBJECT-TYPE
SYNTAX InterfaceIndex MAX-ACCESS read-only STATUS current DESCRIPTION "The value of ifIndex for the port. By convention and if possible, hardware port numbers map directly to external connectors. The value for each port must remain constant at least from one re-initialization of the network management agent to the next."
::= { paraPortEntry 1 }

paraPortType OBJECT-TYPE
SYNTAX INTEGER {
other(1), centronics(2), dataproducts(3) } MAX-ACCESS read-only STATUS current DESCRIPTION
"The port's hardware type."
::= { paraPortEntry 2 }

paraPortInSigNumber OBJECT-TYPE
SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of input signals for the port in the input signal table (paraPortInSigTable). The table contains entries only for those signals the software can detect and that are useful to observe."
::= { paraPortEntry 3 }

paraPortOutSigNumber OBJECT-TYPE
SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of output signals for the port in the output signal table (paraPortOutSigTable). The table contains entries only for those signals the software can assert and that are useful to observe."
::= { paraPortEntry 4 }

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-- Parallel-printer-like Input Signal Table

paraInSigTable OBJECT-TYPE SYNTAX SEQUENCE OF ParaInSigEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION
"A list of port input control signal entries."
::= { para 3 }

paraInSigEntry OBJECT-TYPE
SYNTAX ParaInSigEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION
"Input control signal status for a hardware port."
INDEX { paraInSigPortIndex, paraInSigName } ::= { paraInSigTable 1 }

ParaInSigEntry ::=
SEQUENCE {
paraInSigPortIndex
InterfaceIndex,
paraInSigName
INTEGER,
paraInSigState
INTEGER,
paraInSigChanges
Counter32
}

paraInSigPortIndex OBJECT-TYPE
SYNTAX InterfaceIndex MAX-ACCESS read-only STATUS current DESCRIPTION "The value of paraPortIndex for the port to which this entry belongs."
::= { paraInSigEntry 1 }

paraInSigName OBJECT-TYPE
SYNTAX INTEGER { power(1), online(2), busy(3),
paperout(4), fault(5) }
MAX-ACCESS read-only STATUS current DESCRIPTION
"Identification of a hardware signal."
::= { paraInSigEntry 2 }

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paraInSigState OBJECT-TYPE
SYNTAX INTEGER { none(1), on(2), off(3) } MAX-ACCESS read-only STATUS current DESCRIPTION
"The current signal state."
::= { paraInSigEntry 3 }

paraInSigChanges OBJECT-TYPE
SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of times the signal has changed from 'on' to 'off' or from 'off' to 'on'."
::= { paraInSigEntry 4 }

-- Output Signal Table

paraOutSigTable OBJECT-TYPE SYNTAX SEQUENCE OF ParaOutSigEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION
"A list of port output control signal entries."
::= { para 4 }

paraOutSigEntry OBJECT-TYPE
SYNTAX ParaOutSigEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION
"Output control signal status for a hardware port."
INDEX { paraOutSigPortIndex, paraOutSigName } ::= { paraOutSigTable 1 }

ParaOutSigEntry ::=
SEQUENCE {
paraOutSigPortIndex
InterfaceIndex,
paraOutSigName
INTEGER,
paraOutSigState
INTEGER,
paraOutSigChanges
Counter32
}

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paraOutSigPortIndex OBJECT-TYPE
SYNTAX InterfaceIndex MAX-ACCESS read-only STATUS current DESCRIPTION "The value of paraPortIndex for the port to which this entry belongs."
::= { paraOutSigEntry 1 }

paraOutSigName OBJECT-TYPE
SYNTAX INTEGER { power(1), online(2), busy(3),
paperout(4), fault(5) }
MAX-ACCESS read-only STATUS current DESCRIPTION
"Identification of a hardware signal."
::= { paraOutSigEntry 2 }

paraOutSigState OBJECT-TYPE
SYNTAX INTEGER { none(1), on(2), off(3) } MAX-ACCESS read-only STATUS current DESCRIPTION
"The current signal state."
::= { paraOutSigEntry 3 }

paraOutSigChanges OBJECT-TYPE
SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of times the signal has changed from 'on' to 'off' or from 'off' to 'on'."
::= { paraOutSigEntry 4 }

-- conformance information

paraConformance OBJECT IDENTIFIER ::= { para 5 }

paraGroups OBJECT IDENTIFIER ::= { paraConformance 1 } paraCompliances OBJECT IDENTIFIER ::= { paraConformance 2 } -- compliance statements

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paraCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for SNMPv2 entities which have Parallel-printer-like hardware interfaces."

MODULE -- this module
MANDATORY-GROUPS { paraGroup }
::= { paraCompliances 1 }

-- units of conformance

paraGroup OBJECT-GROUP
OBJECTS { paraNumber, paraPortIndex, paraPortType,
paraPortInSigNumber, paraPortOutSigNumber, paraInSigPortIndex, paraInSigName, paraInSigState, paraInSigChanges, paraOutSigPortIndex, paraOutSigName, paraOutSigState, paraOutSigChanges } STATUS current DESCRIPTION
"A collection of objects providing information
applicable to all Parallel-printer-like interfaces."
::= { paraGroups 1 }

END

5.  Acknowledgements

This memo was produced by the IETF Character MIB Working Group.

6.  References

[1] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Structure
of Management Information for version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1442, SNMP Research,Inc., Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon University, April 1993.

[2] McCloghrie, K., and M. Rose, Editors, "Management Information
Base for Network Management of TCP/IP-based internets: MIB-II", STD 17, RFC 1213, Hughes LAN Systems, Performance Systems International, March 1991.

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[3] Galvin, J., and K. McCloghrie, "Administrative Model for version
2 of the Simple Network Management Protocol (SNMPv2)", RFC 1445, Trusted Information Systems, Hughes LAN Systems, April 1993.

[4] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Protocol
Operations for version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1448, SNMP Research,Inc., Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon University, April 1993.

[5] McCloghrie, K., and F. Kastenholz, "Evolution of the Interfaces
Group of MIB-II", RFC 1573, Hughes LAN Systems, FTP Software, January 1994.

[6] Stewart, B., "Definitions of Managed Objects for Character Stream
Devices using SMIv2", RFC 1658, Xyplex, Inc., July 1994.

[7] Stewart, B., "Definitions of Managed Objects for RS-232-like
Devices using SMIv2", RFC 1659, Xyplex, Inc., July 1994.

7.  Security Considerations

Security issues are not discussed in this memo.

8.  Author's Address

Bob Stewart Xyplex, Inc. 295 Foster Street Littleton, MA 01460

Phone: 508-952-4816 Fax: 508-952-4887 EMail: rlstewart@eng.xyplex.com

Stewart [Page 10]

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