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.
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.
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.
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.
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
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Character MIB [6].
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.
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
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 }
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 }
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 }
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 }
paraCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for SNMPv2 entities which have Parallel-printer-like hardware interfaces."
[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.