rfc1382
Network Working Group D. Throop, Editor
Request for Comments: 1382 Data General Corporation
November 1992
SNMP MIB Extension for the X.25 Packet Layer
Status of this Memo
This RFC 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.
Abstract
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in TCP/IP-based internets.
In particular, it defines objects for managing the Packet Layer of
X.25. The objects defined here, along with the objects in the "SNMP
MIB Extension for LAPB" [9] and the "Definitions of Managed Objects
for RS-232-like Hardware Devices" [8], combine to allow management of
an X.25 protocol stack.
Table of Contents
1. The Network Management Framework ....................... 2
2. Objects ................................................ 2
2.1 Format of Definitions ................................. 3
3. Overview ............................................... 3
3.1 Informal Overview ..................................... 3
3.2 Textual Conventions ................................... 4
3.3 Structure of MIB ...................................... 4
3.4 Tables ................................................ 5
3.5 Table Usage ........................................... 6
3.6 Conformance ........................................... 6
4. Object Definitions ..................................... 7
5. Appendix: Revision History ............................. 62
July 30 1992 ........................................... 62
June 26 1992 ........................................... 62
June 1992 .............................................. 63
April 1992 ............................................. 63
February 1992 .......................................... 65
October 1991 ........................................... 65
June 1991 .............................................. 66
April 1991 ............................................. 66
6. Acknowledgements ....................................... 66
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7. References ............................................. 67
8. Security Considerations ................................ 68
9. Author's Address ....................................... 69
1. The Network Management Framework
The Internet-standard Network Management Framework consists of three
components. These components give the rules for defining objects,
the definitions of objects, and the protocol for manipulating
objects.
The network management framework structures objects in an abstract
information tree. The branches of the tree name objects and the
leaves of the tree contain the values manipulated to effect
management. This tree is called the Management Information Base or
MIB. The concepts of this tree are given in STD 16/RFC 1155, "The
Structure of Management Information" or SMI [1]. The SMI defines the
trunk of the tree and the types of objects used when defining the
leaves. STD 16/RFC 1212, "Towards Concise MIB Definitions" [4],
defines a more concise description mechanism that preserves all the
principals of the SMI.
The core MIB definitions for the Internet suite of protocols can be
found in RFC 1156 [2] "Management Information Base for Network
Management of TCP/IP-based internets". STD 17/RFC 1213 [5] defines
MIB-II, an evolution of MIB-I with changes to incorporate
implementation experience and new operational requirements.
STD 15/RFC 1157 [3] defines the SNMP protocol itself. The protocol
defines how to manipulate the objects in a remote MIB.
The tree structure of the MIB allows new objects to be defined for
the purpose of experimentation and evaluation.
2. Objects
The definition of an object in the MIB requires an object name and
type. Object names and types are defined using the subset of
Abstract Syntax Notation One (ASN.1) [6] defined in the SMI [1].
Objects are named using ASN.1 object identifiers, administratively
assigned names, to specify object types. The object name, together
with an optional object instance, uniquely identifies a specific
instance of an object. For human convenience, we often use a textual
string, termed the OBJECT DESCRIPTOR, to also refer to objects.
Objects also have a syntax that defines the abstract data structure
corresponding to that object type. The ASN.1 language [6] provides
the primitives used for this purpose. The SMI [1] purposely
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restricts the ASN.1 constructs which may be used for simplicity and
ease of implementation. The encoding of an object type simply
describes how to represent an object using ASN.1 encoding rules [7],
for purposes of dealing with the SNMP protocol.
2.1. Format of Definitions
Section 4 contains the specification of all object types defined in
this MIB module. The object types are defined using the conventions
defined in the SMI, as amended by the extensions specified in
"Towards Concise MIB Definitions" [4].
3. Overview
3.1. Informal Overview
This section describes how the objects defined below relate with
other MIBs. This section is only informational to help understand
how the pieces fit together.
The objects defined below are used in conjunction with MIB-II and
other MIBs such as the LAPB MIB [9]. A system with a complete X.25
stack running over a synchronous line will have at least two
interfaces in the ifTable defined in MIB-II. There will be an
interface for LAPB and another interface for the packet layer of
X.25. There will also be objects defined in the RS-232-like MIB for
the physical sync line.
Each software interface identifies the layer below it used to send
and receive packets. The X.25 MIB object, defined below,
x25OperDataLinkId, specifies an instance of lapbAdmnIndex for the
LAPB interface under that X.25. The LAPB object, lapbOperPortId,
identifies an instance of the rs232PortIndex for the the Sync line
used by LAPB.
For X.25 running over LAPB over Ethernet, the lapbOperPortId would
identify the instance of ifIndex for the Ethernet interface.
Each X.25 subnetwork will have separate entries in the ifTable. Thus
a system with two X.25 lines would have two ifTable entries for the
two X.25 packet layers and two other entries for the two LAPB
interfaces. Each X.25 Packet Layer MIB would identify the instance of
the LAPB MIB for the interface below it. Each LAPB MIB would identify
the Sync line below it. The system would also have two entries in the
rs232PortTable and rs232SyncPortTable for the two physical lines.
Since the ifTable as defined in MIB-II is device independent, it
doesn't have anything specific for any type of interface. The
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objects below define the X.25 packet layer specific information for
an interface of type X.25. Different X.25 interfaces can also be
differentiated by matching the values of ifIndex with x25AdmnIndex.
3.2. Textual Conventions
This MIB introduces a new data type as a textual convention for use
with X.25. This textual convention enhances the readability of the
specification and can ease comparison with other specifications if
appropriate. It should be noted that the introduction of such
textual conventions has no effect on either the syntax nor the
semantics of any managed objects. These conventions are merely an
artifact of the explanatory method used. Objects defined in terms of
one of these methods are always encoded by means of the rules that
define the primitive type. Hence, no changes to the SMI or the SNMP
are necessary to accommodate these textual conventions which are
adopted merely for the convenience of readers and writers in pursuit
of the elusive goal of clear, concise, and unambiguous MIB documents.
This MIB introduces the data type of:
X121Address
3.3. Structure of MIB
Instances of the objects defined below represent attributes of an
X.25 Packet Layer interface. At present these interfaces are
identified by an ifType object in the Internet-standard MIB-II [5]
of:
ddn-x25(4), and
rfc887-x25(5).
For these interfaces, the value of the ifSpecific variable in the
MIB-II [5] has the OBJECT IDENTIFIER value:
x25 OBJECT IDENTIFIER ::= { transmission 5 }
The objects defined below are similar to those defined in a draft ISO
document for X.25 management [11]. Some object definitions also
reference the ISO specification for X.25 [10] to specify the section
that will give the reader additional information about the object.
Access to those documents maybe useful (but isn't essential) to
understand the names and semantics of some objects. The similarity
of these objects with the ISO objects minimizes the instrumentation
required by those systems that support both OSI and TCP/IP management
protocols.
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Since the objects defined here are extensions to the Internet
Standard MIB [2] and thus also an extension of the second version,
MIB-II [5], the objects defined here explicitly do not duplicate
objects defined in existing standards. In some instances
clarification of how to apply those objects has been given.
The relationship between an X.25 Packet Layer interface and an
interface in the context of the Internet-standard MIB [5] is one-to-
one. As such, the value of an ifIndex object instance can be directly
used to identify corresponding instances of the objects defined
below.
3.4. Tables
The objects below form several tables. These tables are:
x25AdmnTable
x25OperTable
x25StatTable
x25ChannelTable
x25CircuitTable
x25ClearedCircuitTable
x25CallParmTable
The x25AdmnTable defines objects for the parameters of an X.25
interface which the administrator can read and set. These objects
are used at interface initialization time to start the interface.
Once the interface has started, changes to the objects in the
Administration table may not take affect until the interface is re-
initialized.
The x25OperTable defines objects that report the current parameters
used by a running interface. These objects are read-only.
The x25StatTable defines objects that report operational statistics
for an X.25 interface. These are read-only counters of events that
occurred at the interface.
The x25ChannelTable defines objects to allow the administrator to
manage the division of channel numbers.
The x25CircuitTable defines objects that return information about
existing X.25 circuits. These entries result from calls placed or
answered by the PLE or from PVCs.
The x25ClearedCircuitTable contains objects for recording the
termination information from circuits that cleared abnormally.
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The x25CallParmTable defines the call parameters used to call other
systems. This table contains call parameter entries which are
referenced by other tables. For example, the x25AdmnTable has one
object that identifies the entry in the table for the default PLE
parameters. The x25CircuitTable has one object that identifies the
entry in the x25CallParmTable for the parameters in use by that
circuit. Other MIBs may also reference entries to identify call
parameters to use to make X.25 calls.
3.5. Table Usage
Different tables provide different functions. The administrator sets
the starting X.25 parameters in the x25AdmnTable for the X.25 PLE;
these objects include a reference to the x25CallParmTable entry to
identify the default call parameters for the PLE. Once all the
parameters are set, the administrator initializes the interface. As
part of initializing the interface, the operating parameters are
copied into the interface from the x25AdmnTable; these parameters are
viewable by getting the objects in the x25OperTable. (The interface
maybe started by setting the value of ifAdminStatus to up.) If any
PVCs are configured, their parameters can be set in the the
x25CircuitTable before initializing the interface; this should be
done in conjunction with configuring higher layer entities to use the
PVCs via the MIBs for those entities.
Once the PLE completes initialization, it makes additional entries in
the x25circuitTable for calls placed or answered. When a circuit is
cleared, the status of the entry for the circuit is set to closed
and, if the clear is abnormal, an entry will also be made in the
x25ClearedCircuitTable. An entry in the x25CircuitTable with a
status of closed maybe deleted by the agent at its convenience. A
closed entry will always be reused at the time the PLE re-allocates
the channel number of the entry for another call. The call
parameters used for a circuit can be found by looking in the
x25CircuitTable and following the x25CircuitCallParamId pointer to
the entry in the x25CallParmTable that contains the parameters.
There are no mechanisms in the X.25 MIB for telling the PLE to place
an X.25 call. Such mechanisms belong in the MIBs for the higher layer
entities that use the X.25 circuits.
3.6. Conformance
All the objects defined here are mandatory. To claim conformance with
this MIB an implementation must support all objects. However some
objects pertain to features that are optional. There are values
defined for those objects that indicate the implementation does not
support the optional feature. The agent for such an implementation
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must support reading the object and return the value that indicates
the optional feature isn't supported and reject set requests to
change the object.
Some optional features have more than one object that pertain to it
(window rotation has a timer, a count, and a counter for timer
runouts). In such case, any object which indicates the optional
feature isn't supported is sufficient to indicate the feature isn't
supported and the values of the other objects relative to that
feature are undefined.
4. Object Definitions
RFC1382-MIB DEFINITIONS ::= BEGIN
IMPORTS
Counter, Gauge, TimeTicks
FROM RFC1155-SMI
OBJECT-TYPE
FROM RFC-1212
DisplayString, transmission
FROM RFC1213-MIB
TRAP-TYPE
FROM RFC-1215
EntryStatus
FROM RFC1271-MIB
PositiveInteger,
IfIndexType
FROM RFC1381-MIB;
x25 OBJECT IDENTIFIER ::= { transmission 5 }
-- Support of the X25 subtree and all subtrees under it
-- is mandatory for all agents of system that implement X.25.
X121Address ::= OCTET STRING (SIZE(0..17))
-- 0 to 17 bytes in length containing the ASCII
-- characters [0-9], each octet contains one digit
-- of the address.
-- ###########################################################
-- X.25 Administration Table
-- ###########################################################
x25AdmnTable OBJECT-TYPE
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SYNTAX SEQUENCE OF X25AdmnEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This table contains the administratively
set configuration parameters for an X.25
Packet Level Entity (PLE).
Most of the objects in this table have
corresponding objects in the x25OperTable.
This table contains the values as last set
by the administrator. The x25OperTable
contains the values actually in use by an
X.25 PLE.
Changing an administrative value may or may
not change a current operating value. The
operating value may not change until the
interface is restarted. Some
implementations may change the values
immediately upon changing the administrative
table. All implementations are required to
load the values from the administrative
table when initializing a PLE."
::= { x25 1 }
x25AdmnEntry OBJECT-TYPE
SYNTAX X25AdmnEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Entries of x25AdmnTable."
INDEX { x25AdmnIndex }
::= { x25AdmnTable 1 }
X25AdmnEntry ::= SEQUENCE {
x25AdmnIndex
IfIndexType,
x25AdmnInterfaceMode
INTEGER,
x25AdmnMaxActiveCircuits
INTEGER,
x25AdmnPacketSequencing
INTEGER,
x25AdmnRestartTimer
PositiveInteger,
x25AdmnCallTimer
PositiveInteger,
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x25AdmnResetTimer
PositiveInteger,
x25AdmnClearTimer
PositiveInteger,
x25AdmnWindowTimer
PositiveInteger,
x25AdmnDataRxmtTimer
PositiveInteger,
x25AdmnInterruptTimer
PositiveInteger,
x25AdmnRejectTimer
PositiveInteger,
x25AdmnRegistrationRequestTimer
PositiveInteger,
x25AdmnMinimumRecallTimer
PositiveInteger,
x25AdmnRestartCount
INTEGER,
x25AdmnResetCount
INTEGER,
x25AdmnClearCount
INTEGER,
x25AdmnDataRxmtCount
INTEGER,
x25AdmnRejectCount
INTEGER,
x25AdmnRegistrationRequestCount
INTEGER,
x25AdmnNumberPVCs
INTEGER,
x25AdmnDefCallParamId
OBJECT IDENTIFIER,
x25AdmnLocalAddress
X121Address,
x25AdmnProtocolVersionSupported
OBJECT IDENTIFIER
}
x25AdmnIndex OBJECT-TYPE
SYNTAX IfIndexType
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The ifIndex value for the X.25 Interface."
::= { x25AdmnEntry 1 }
x25AdmnInterfaceMode OBJECT-TYPE
SYNTAX INTEGER {
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dte (1),
dce (2),
dxe (3)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Identifies DCE/DTE mode in which the
interface operates. A value of dxe
indicates the mode will be determined by XID
negotiation."
REFERENCE "10733 5.9 interfaceMode"
::= { x25AdmnEntry 2 }
x25AdmnMaxActiveCircuits OBJECT-TYPE
SYNTAX INTEGER (0..4096)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The maximum number of circuits this PLE can
support; including PVCs."
REFERENCE "10733 5.9 maxActiveCircuits;
See ISO 8208, Section 3.7"
::= { x25AdmnEntry 3 }
x25AdmnPacketSequencing OBJECT-TYPE
SYNTAX INTEGER {
modulo8 (1),
modulo128 (2)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The modulus of the packet sequence number
space."
REFERENCE "10733 extendedPacketSequencing;
See ISO 8208 Section 7.1.1"
::= { x25AdmnEntry 4 }
x25AdmnRestartTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T20 restart timer in milliseconds."
REFERENCE "10733 5.9 restartTime
See ISO 8208 Section 4.1, table 26"
::= { x25AdmnEntry 5 }
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x25AdmnCallTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T21 Call timer in milliseconds."
REFERENCE "10733 callTime;
See ISO 8208 Section 5.2.1, table 26"
::= { x25AdmnEntry 6 }
x25AdmnResetTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T22 Reset timer in milliseconds."
REFERENCE "10733 resetTime;
See ISO 8208 Section 8.1, table 26"
::= { x25AdmnEntry 7 }
x25AdmnClearTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T23 Clear timer in milliseconds."
REFERENCE "10733 clearTime;
See ISO 8208 Section 5.5.1, table 26"
::= { x25AdmnEntry 8 }
x25AdmnWindowTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T24 window status transmission timer in
milliseconds. A value of 2147483647
indicates no window timer in use."
REFERENCE "10733 5.10.1 windowTime (opt);
See ISO 8208 Section 11.2.2, table 26"
::= { x25AdmnEntry 9 }
x25AdmnDataRxmtTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T25 data retransmission timer in
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milliseconds. A value of 2147483647
indicates no data retransmission timer in
use."
REFERENCE "10733 5.10.1 dataRetransmissionTime (opt);
See ISO 8208 Section 11.2.1, table 26"
::= { x25AdmnEntry 10 }
x25AdmnInterruptTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T26 interrupt timer in milliseconds. A
value of 2147483647 indicates no interrupt
timer in use."
REFERENCE "10733 interruptTime;
See ISO 8208 Section 6.8.1, table 26"
::= { x25AdmnEntry 11 }
x25AdmnRejectTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T27 Reject retransmission timer in
milliseconds. A value of 2147483647
indicates no reject timer in use."
REFERENCE "10733 5.10.1 dataRejectTime (opt);
See ISO 8208 Section 13.4.1, table 26"
::= { x25AdmnEntry 12 }
x25AdmnRegistrationRequestTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The T28 registration timer in milliseconds.
A value of 2147483647 indicates no
registration timer in use."
REFERENCE "10733 5.8.1 registrationRequestTime (opt)
See ISO 8208 Section 13.1.1.1, table 26"
::= { x25AdmnEntry 13 }
x25AdmnMinimumRecallTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
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"Minimum time interval between unsuccessful
call attempts in milliseconds."
REFERENCE "10733 5.9 minimum RecallTimer"
::= { x25AdmnEntry 14 }
x25AdmnRestartCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The R20 restart retransmission count."
REFERENCE "10733 5.9 restartCount;
See ISO 8208 Section 4.1, table 27"
::= { x25AdmnEntry 15 }
x25AdmnResetCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The r22 Reset retransmission count."
REFERENCE "10733 resetCount;
See section ISO 8208 8.1, table 27"
::= { x25AdmnEntry 16 }
x25AdmnClearCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The r23 Clear retransmission count."
REFERENCE "10733 clearCount;
See ISO 8208 Section 5.5.1, table 27"
::= { x25AdmnEntry 17 }
x25AdmnDataRxmtCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The R25 Data retransmission count. This
value is irrelevant if the
x25AdmnDataRxmtTimer indicates no timer in
use."
REFERENCE "10733 5.10.1 dataRetransmissionCount (opt)
See ISO 8208 Section 11.2.1, table 27"
::= { x25AdmnEntry 18 }
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x25AdmnRejectCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The R27 reject retransmission count. This
value is irrelevant if the
x25AdmnRejectTimer indicates no timer in
use."
REFERENCE "10733 5.10.1 dataRejectCount (opt)"
::= { x25AdmnEntry 19 }
x25AdmnRegistrationRequestCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The R28 Registration retransmission Count.
This value is irrelevant if the
x25AdmnRegistrationRequestTimer indicates no
timer in use."
REFERENCE "10733 5.8.1 registrationRequestCount (opt);
See ISO 8208 Section 13.1.1.1, table 27"
::= { x25AdmnEntry 20 }
x25AdmnNumberPVCs OBJECT-TYPE
SYNTAX INTEGER (0..4096)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The number of PVC configured for this PLE.
The PVCs use channel numbers from 1 to this
number."
::= { x25AdmnEntry 21 }
x25AdmnDefCallParamId OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This identifies the instance of the
x25CallParmIndex for the entry in the
x25CallParmTable which contains the default
call parameters for this PLE."
::= { x25AdmnEntry 22 }
x25AdmnLocalAddress OBJECT-TYPE
SYNTAX X121Address
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ACCESS read-write
STATUS mandatory
DESCRIPTION
"The local address for this PLE subnetwork.
A zero length address maybe returned by PLEs
that only support PVCs."
REFERENCE "10733 5.9 localDTEAddress"
::= { x25AdmnEntry 23 }
x25AdmnProtocolVersionSupported OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Identifies the version of the X.25 protocol
this interface should support. Object
identifiers for common versions are defined
below in the x25ProtocolVersion subtree."
REFERENCE "10733 5.9 protocolVersionSupported"
::= { x25AdmnEntry 24 }
-- ###########################################################
-- X.25 Operational Table
-- ###########################################################
x25OperTable OBJECT-TYPE
SYNTAX SEQUENCE OF X25OperEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The operation parameters in use by the X.25
PLE."
::= { x25 2 }
x25OperEntry OBJECT-TYPE
SYNTAX X25OperEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Entries of x25OperTable."
INDEX { x25OperIndex }
::= { x25OperTable 1 }
X25OperEntry ::= SEQUENCE {
x25OperIndex
IfIndexType,
x25OperInterfaceMode
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INTEGER,
x25OperMaxActiveCircuits
INTEGER,
x25OperPacketSequencing
INTEGER,
x25OperRestartTimer
PositiveInteger,
x25OperCallTimer
PositiveInteger,
x25OperResetTimer
PositiveInteger,
x25OperClearTimer
PositiveInteger,
x25OperWindowTimer
PositiveInteger,
x25OperDataRxmtTimer
PositiveInteger,
x25OperInterruptTimer
PositiveInteger,
x25OperRejectTimer
PositiveInteger,
x25OperRegistrationRequestTimer
PositiveInteger,
x25OperMinimumRecallTimer
PositiveInteger,
x25OperRestartCount
INTEGER,
x25OperResetCount
INTEGER,
x25OperClearCount
INTEGER,
x25OperDataRxmtCount
INTEGER,
x25OperRejectCount
INTEGER,
x25OperRegistrationRequestCount
INTEGER,
x25OperNumberPVCs
INTEGER,
x25OperDefCallParamId
OBJECT IDENTIFIER,
x25OperLocalAddress
X121Address,
x25OperDataLinkId
OBJECT IDENTIFIER,
x25OperProtocolVersionSupported
OBJECT IDENTIFIER
}
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x25OperIndex OBJECT-TYPE
SYNTAX IfIndexType
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The ifIndex value for the X.25 interface."
::= { x25OperEntry 1 }
x25OperInterfaceMode OBJECT-TYPE
SYNTAX INTEGER {
dte (1),
dce (2),
dxe (3)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"Identifies DCE/DTE mode in which the
interface operates. A value of dxe
indicates the role will be determined by XID
negotiation at the Link Layer and that
negotiation has not yet taken place."
REFERENCE "10733 5.9 interfaceMode"
::= { x25OperEntry 2 }
x25OperMaxActiveCircuits OBJECT-TYPE
SYNTAX INTEGER (0..4096)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"Maximum number of circuits this PLE can
support."
REFERENCE "10733 5.9 maxActiveCircuits
See ISO 8208, Section 3.7"
::= { x25OperEntry 3 }
x25OperPacketSequencing OBJECT-TYPE
SYNTAX INTEGER {
modulo8 (1),
modulo128 (2)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The modulus of the packet sequence number
space."
REFERENCE "10733 extendedPacketSequencing;
See ISO 8208 Section 7.1.1"
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::= { x25OperEntry 4 }
x25OperRestartTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The T20 restart timer in milliseconds."
REFERENCE "10733 5.9 restartTime;
See ISO 8208 Section 4.1, table 26"
::= { x25OperEntry 5 }
x25OperCallTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The T21 Call timer in milliseconds."
REFERENCE "10733 callTime;
See ISO 8208 Section 5.2.1, table 26"
::= { x25OperEntry 6 }
x25OperResetTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The T22 Reset timer in milliseconds."
REFERENCE "10733 resetTime;
See ISO 8208 Section 8.1, table 26"
::= { x25OperEntry 7 }
x25OperClearTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The T23 Clear timer in milliseconds."
REFERENCE "10733 clearTime;
See ISO 8208 Section 5.5.1, table 26"
::= { x25OperEntry 8 }
x25OperWindowTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The T24 window status transmission timer
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RFC 1382 X.25 Packet Layer MIB November 1992
milliseconds. A value of 2147483647
indicates no window timer in use."
REFERENCE "10733 5.10.1 windowTime (opt);
See ISO 8208 Section 11.2.2, table 26"
::= { x25OperEntry 9 }
x25OperDataRxmtTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The T25 Data Retransmission timer in
milliseconds. A value of 2147483647
indicates no data retransmission timer in
use."
REFERENCE "10733 5.10.1 dataRetransmissionTime (opt);
See ISO 8208 Section 11.2.1, table 26"
::= { x25OperEntry 10 }
x25OperInterruptTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The T26 Interrupt timer in milliseconds. A
value of 2147483647 indicates interrupts are
not being used."
REFERENCE "10733 interruptTime;
See ISO 8208 Section 6.8.1, table 26"
::= { x25OperEntry 11 }
x25OperRejectTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The T27 Reject retransmission timer in
milliseconds. A value of 2147483647
indicates no reject timer in use."
REFERENCE "10733 5.10.1 dataRejectTime (opt);
See ISO 8208 Section 13.4.1, table 26"
::= { x25OperEntry 12 }
x25OperRegistrationRequestTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
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RFC 1382 X.25 Packet Layer MIB November 1992
"The T28 registration timer in milliseconds.
A value of 2147483647 indicates no
registration timer in use."
REFERENCE "10733 5.8.1 registrationRequestTime (opt);
See ISO 8208 Section 13.1.1.1, table 26"
::= { x25OperEntry 13 }
x25OperMinimumRecallTimer OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"Minimum time interval between unsuccessful
call attempts in milliseconds."
REFERENCE "10733 5.9 minimum RecallTimer"
::= { x25OperEntry 14 }
x25OperRestartCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The R20 restart retransmission count."
REFERENCE "10733 5.9 restartCount
See ISO 8208 Section 4.1, table 27"
::= { x25OperEntry 15 }
x25OperResetCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The r22 Reset retransmission count."
REFERENCE "10733 resetCount;
See section ISO 8208 8.1, table 27"
::= { x25OperEntry 16 }
x25OperClearCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The r23 Clear retransmission count."
REFERENCE "10733 clearCount;
See ISO 8208 Section 5.5.1, table 27"
::= { x25OperEntry 17 }
x25OperDataRxmtCount OBJECT-TYPE
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RFC 1382 X.25 Packet Layer MIB November 1992
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The R25 Data retransmission count. This
value is undefined if the
x25OperDataRxmtTimer indicates no timer in
use."
REFERENCE "10733 5.10.1 dataRetransmissionCount (opt);
See ISO 8208 Section 11.2.1, table 27"
::= { x25OperEntry 18 }
x25OperRejectCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The R27 reject retransmission count. This
value is undefined if the x25OperRejectTimer
indicates no timer in use."
REFERENCE "10733 5.10.1 dataRejectCount (opt)"
::= { x25OperEntry 19 }
x25OperRegistrationRequestCount OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The R28 Registration retransmission Count.
This value is undefined if the
x25OperREgistrationRequestTimer indicates no
timer in use."
REFERENCE "10733 5.8.1 registrationRequestCount (opt);
See ISO 8208 Section 13.1.1.1, table 27"
::= { x25OperEntry 20 }
x25OperNumberPVCs OBJECT-TYPE
SYNTAX INTEGER (0..4096)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of PVC configured for this PLE.
The PVCs use channel numbers from 1 to this
number."
::= { x25OperEntry 21 }
x25OperDefCallParamId OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
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RFC 1382 X.25 Packet Layer MIB November 1992
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This identifies the instance of the
x25CallParmIndex for the entry in the
x25CallParmTable that contains the default
call parameters for this PLE."
::= { x25OperEntry 22 }
x25OperLocalAddress OBJECT-TYPE
SYNTAX X121Address
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The local address for this PLE subnetwork.
A zero length address maybe returned by PLEs
that only support PVCs."
REFERENCE "10733 5.9 localDTEAddress"
::= { x25OperEntry 23 }
x25OperDataLinkId OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"This identifies the instance of the index
object in the first table of the most device
specific MIB for the interface used by this
PLE."
::= { x25OperEntry 24 }
x25OperProtocolVersionSupported OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"Identifies the version of the X.25 protocol
this interface supports. Object identifiers
for common versions are defined below in the
x25ProtocolVersion subtree."
REFERENCE "10733 5.9 protocolVersionSupported"
::= { x25OperEntry 25 }
-- MIB-II also provides:
-- ifDescr:
-- On an X.25 interface this must include sufficient
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RFC 1382 X.25 Packet Layer MIB November 1992
-- information to enable the system's administrator
-- to determine the appropriate configuration
-- information on a system having multiple X.25
-- subnetworks.
-- ifType: ddn-x25 or rfc877-x25
-- an interface of type ddn-x25 will use an algorithm to
-- translate between X.121 address and IP addresses.
-- An interface of type rfc877-x25 will use a
-- configuration table to translate between X.121
-- addresses and IP addresses.
-- ifMtu: the maximum PDU a higher layer can pass to X.25 or
-- receive from X.25
-- ifSpeed:
-- This will be the value of the local clock for this line.
-- A value of zero indicates external clocking.
-- ifAdminStatus:
-- ifOperStatus
-- ifLastChange
-- ###########################################################
-- X.25 Statistics Table
-- ###########################################################
x25StatTable OBJECT-TYPE
SYNTAX SEQUENCE OF X25StatEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Statistics information about this X.25
PLE."
::= { x25 3 }
x25StatEntry OBJECT-TYPE
SYNTAX X25StatEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Entries of the x25StatTable."
INDEX { x25StatIndex }
::= { x25StatTable 1 }
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RFC 1382 X.25 Packet Layer MIB November 1992
X25StatEntry ::= SEQUENCE {
x25StatIndex
IfIndexType,
x25StatInCalls
Counter,
x25StatInCallRefusals
Counter,
x25StatInProviderInitiatedClears
Counter,
x25StatInRemotelyInitiatedResets
Counter,
x25StatInProviderInitiatedResets
Counter,
x25StatInRestarts
Counter,
x25StatInDataPackets
Counter,
x25StatInAccusedOfProtocolErrors
Counter,
x25StatInInterrupts
Counter,
x25StatOutCallAttempts
Counter,
x25StatOutCallFailures
Counter,
x25StatOutInterrupts
Counter,
x25StatOutDataPackets
Counter,
x25StatOutgoingCircuits
Gauge,
x25StatIncomingCircuits
Gauge,
x25StatTwowayCircuits
Gauge,
x25StatRestartTimeouts
Counter,
x25StatCallTimeouts
Counter,
x25StatResetTimeouts
Counter,
x25StatClearTimeouts
Counter,
x25StatDataRxmtTimeouts
Counter,
x25StatInterruptTimeouts
Counter,
x25StatRetryCountExceededs
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RFC 1382 X.25 Packet Layer MIB November 1992
Counter,
x25StatClearCountExceededs
Counter
}
x25StatIndex OBJECT-TYPE
SYNTAX IfIndexType
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The ifIndex value for the X.25 interface."
::= { x25StatEntry 1 }
x25StatInCalls OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of incoming calls received."
::= { x25StatEntry 2 }
x25StatInCallRefusals OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of incoming calls refused. This
includes calls refused by the PLE and by
higher layers. This also includes calls
cleared because of restricted fast select."
::= { x25StatEntry 3 }
x25StatInProviderInitiatedClears OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of clear requests with a cause
code other than DTE initiated."
REFERENCE "10733 providerInitiatedDisconnect"
::= { x25StatEntry 4 }
x25StatInRemotelyInitiatedResets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of reset requests received with
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RFC 1382 X.25 Packet Layer MIB November 1992
cause code DTE initiated."
REFERENCE "10733 remotelyInitiatedResets"
::= { x25StatEntry 5 }
x25StatInProviderInitiatedResets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of reset requests received with
cause code other than DTE initiated."
REFERENCE "10733 ProviderInitiatedResets"
::= { x25StatEntry 6 }
x25StatInRestarts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of remotely initiated (including
provider initiated) restarts experienced by
the PLE excluding the restart associated
with bringing up the PLE interface. This
only counts restarts received when the PLE
already has an established connection with
the remove PLE."
REFERENCE "10733 5.9 remotelyInitiatedRestarts"
::= { x25StatEntry 7 }
x25StatInDataPackets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of data packets received."
REFERENCE "10733 5.9 dataPacketsReceived."
::= { x25StatEntry 8 }
x25StatInAccusedOfProtocolErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of packets received containing a
procedure error cause code. These include
clear, reset, restart, or diagnostic
packets."
REFERENCE "CD 10733 5.9 accusedOfProtocolError"
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RFC 1382 X.25 Packet Layer MIB November 1992
::= { x25StatEntry 9 }
x25StatInInterrupts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of interrupt packets received by
the PLE or over the PVC/VC."
REFERENCE "10733 interruptPacketsReceived"
::= { x25StatEntry 10 }
x25StatOutCallAttempts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of calls attempted."
REFERENCE "10733 5.9 callAttempts"
::= { x25StatEntry 11 }
x25StatOutCallFailures OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of call attempts which failed.
This includes calls that were cleared
because of restrictive fast select."
::= { x25StatEntry 12 }
x25StatOutInterrupts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of interrupt packets send by the
PLE or over the PVC/VC."
REFERENCE "10733 InterruptPacketsSent"
::= { x25StatEntry 13 }
x25StatOutDataPackets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of data packets sent by this
PLE."
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RFC 1382 X.25 Packet Layer MIB November 1992
REFERENCE "10733 dataPacketSent"
::= { x25StatEntry 14 }
x25StatOutgoingCircuits OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of active outgoing circuits.
This includes call requests sent but not yet
confirmed. This does not count PVCs."
::= { x25StatEntry 15 }
x25StatIncomingCircuits OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of active Incoming Circuits.
This includes call indications received but
not yet acknowledged. This does not count
PVCs."
::= { x25StatEntry 16 }
x25StatTwowayCircuits OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of active two-way Circuits.
This includes call requests sent but not yet
confirmed. This does not count PVCs."
::= { x25StatEntry 17 }
x25StatRestartTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the T20 restart timer
expired."
REFERENCE "10733 5.9 restartTimeouts"
::= { x25StatEntry 18 }
x25StatCallTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
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RFC 1382 X.25 Packet Layer MIB November 1992
DESCRIPTION
"The number of times the T21 call timer
expired."
REFERENCE "10733 5.9 callTimeouts"
::= { x25StatEntry 19 }
x25StatResetTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the T22 reset timer
expired."
REFERENCE "10733 5.9 resetTimeouts"
::= { x25StatEntry 20 }
x25StatClearTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the T23 clear timer
expired."
REFERENCE "10733 5.9 clearTimeouts"
::= { x25StatEntry 21 }
x25StatDataRxmtTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the T25 data timer
expired."
REFERENCE "10733 5.9 dataRetransmissionsTimerExpiries"
::= { x25StatEntry 22 }
x25StatInterruptTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the T26 interrupt timer
expired."
REFERENCE "10733 5.9 interruptTimerExpires"
::= { x25StatEntry 23 }
x25StatRetryCountExceededs OBJECT-TYPE
SYNTAX Counter
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RFC 1382 X.25 Packet Layer MIB November 1992
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times a retry counter was
exhausted."
REFERENCE "10733 5.9 retryCountsExceeded"
::= { x25StatEntry 24 }
x25StatClearCountExceededs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the R23 clear count was
exceeded."
REFERENCE "10733 5.9 clearCountsExceeded"
::= { x25StatEntry 25 }
-- MIB-II also contains:
-- ifInOctets: Number of data octets delivered to upper
-- layer entities.
-- ifInUcastPkts: Number of packets with a clear M-bit
-- delivered to higher layer entities.
-- ifDiscards: Number of packets dropped for lack of buffering
-- ifInErrors: Number of packets received containing errors
-- REFERENCE ProtocolErrorsDetectedLocally
-- ifInUnknownProtos: Number of packets with unknown circuit
-- identifier.
-- ifOutOctets: Number of data octets delivered by
-- X.25 to upper layers.
-- ifOutUcastPkts: Number of packets with a clear M-bit
-- received from higher layer entities.
-- ###########################################################
-- X.25 Channel Table
-- ###########################################################
x25ChannelTable OBJECT-TYPE
SYNTAX SEQUENCE OF X25ChannelEntry
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RFC 1382 X.25 Packet Layer MIB November 1992
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"These objects contain information about the
channel number configuration in an X.25 PLE.
These values are the configured values.
changes in these values after the interfaces
has started may not be reflected in the
operating PLE."
REFERENCE "See ISO 8208, Section 3.7"
::= { x25 4 }
x25ChannelEntry OBJECT-TYPE
SYNTAX X25ChannelEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Entries of x25ChannelTable."
REFERENCE "This provides the information available
in 10733 logicalChannelAssignments."
INDEX { x25ChannelIndex }
::= { x25ChannelTable 1 }
X25ChannelEntry ::= SEQUENCE {
x25ChannelIndex
IfIndexType,
x25ChannelLIC
INTEGER,
x25ChannelHIC
INTEGER,
x25ChannelLTC
INTEGER,
x25ChannelHTC
INTEGER,
x25ChannelLOC
INTEGER,
x25ChannelHOC
INTEGER
}
x25ChannelIndex OBJECT-TYPE
SYNTAX IfIndexType
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The ifIndex value for the X.25 Interface."
::= { x25ChannelEntry 1 }
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RFC 1382 X.25 Packet Layer MIB November 1992
x25ChannelLIC OBJECT-TYPE
SYNTAX INTEGER (0..4095)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Lowest Incoming channel."
::= { x25ChannelEntry 2 }
x25ChannelHIC OBJECT-TYPE
SYNTAX INTEGER (0..4095)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Highest Incoming channel. A value of zero
indicates no channels in this range."
::= { x25ChannelEntry 3 }
x25ChannelLTC OBJECT-TYPE
SYNTAX INTEGER (0..4095)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Lowest Two-way channel."
::= { x25ChannelEntry 4 }
x25ChannelHTC OBJECT-TYPE
SYNTAX INTEGER (0..4095)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Highest Two-way channel. A value of zero
indicates no channels in this range."
::= { x25ChannelEntry 5 }
x25ChannelLOC OBJECT-TYPE
SYNTAX INTEGER (0..4095)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Lowest outgoing channel."
::= { x25ChannelEntry 6 }
x25ChannelHOC OBJECT-TYPE
SYNTAX INTEGER (0..4095)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Highest outgoing channel. A value of zero
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RFC 1382 X.25 Packet Layer MIB November 1992
indicates no channels in this range."
::= { x25ChannelEntry 7 }
-- ###########################################################
-- X25 Per Circuits Information Table
-- ###########################################################
x25CircuitTable OBJECT-TYPE
SYNTAX SEQUENCE OF X25CircuitEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"These objects contain general information
about a specific circuit of an X.25 PLE."
::= { x25 5 }
x25CircuitEntry OBJECT-TYPE
SYNTAX X25CircuitEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Entries of x25CircuitTable."
INDEX { x25CircuitIndex,
x25CircuitChannel }
::= { x25CircuitTable 1 }
X25CircuitEntry ::= SEQUENCE {
x25CircuitIndex
IfIndexType,
x25CircuitChannel
INTEGER,
x25CircuitStatus
INTEGER,
x25CircuitEstablishTime
TimeTicks,
x25CircuitDirection
INTEGER,
x25CircuitInOctets
Counter,
x25CircuitInPdus
Counter,
x25CircuitInRemotelyInitiatedResets
Counter,
x25CircuitInProviderInitiatedResets
Counter,
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RFC 1382 X.25 Packet Layer MIB November 1992
x25CircuitInInterrupts
Counter,
x25CircuitOutOctets
Counter,
x25CircuitOutPdus
Counter,
x25CircuitOutInterrupts
Counter,
x25CircuitDataRetransmissionTimeouts
Counter,
x25CircuitResetTimeouts
Counter,
x25CircuitInterruptTimeouts
Counter,
x25CircuitCallParamId
OBJECT IDENTIFIER,
x25CircuitCalledDteAddress
X121Address,
x25CircuitCallingDteAddress
X121Address,
x25CircuitOriginallyCalledAddress
X121Address,
x25CircuitDescr
DisplayString
}
x25CircuitIndex OBJECT-TYPE
SYNTAX IfIndexType
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The ifIndex value for the X.25 Interface."
::= { x25CircuitEntry 1 }
x25CircuitChannel OBJECT-TYPE
SYNTAX INTEGER (0..4095)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The channel number for this circuit."
::= { x25CircuitEntry 2 }
x25CircuitStatus OBJECT-TYPE
SYNTAX INTEGER { -- state table states
invalid (1),
closed (2), -- (p1)
calling (3), -- (p2,p3,p5)
open (4), -- (p4)
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RFC 1382 X.25 Packet Layer MIB November 1992
clearing (5), -- (p6,p7)
pvc (6),
pvcResetting (7),
startClear (8), -- Close cmd
startPvcResetting (9), -- Reset cmd
other (10)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This object reports the current status of
the circuit.
An existing instance of this object can only
be set to startClear, startPvcResetting, or
invalid. An instance with the value calling
or open can only be set to startClear and
that action will start clearing the circuit.
An instance with the value PVC can only be
set to startPvcResetting or invalid and that
action resets the PVC or deletes the circuit
respectively. The values startClear or
startPvcResetting will never be returned by
an agent. An attempt to set the status of
an existing instance to a value other than
one of these values will result in an error.
A non-existing instance can be set to PVC to
create a PVC if the implementation supports
dynamic creation of PVCs. Some
implementations may only allow creation and
deletion of PVCs if the interface is down.
Since the instance identifier will supply
the PLE index and the channel number,
setting this object alone supplies
sufficient information to create the
instance. All the DEFVAL clauses for the
other objects of this table are appropriate
for creating a PVC; PLEs creating entries
for placed or accepted calls will use values
appropriate for the call rather than the
value of the DEFVAL clause. Two managers
trying to create the same PVC can determine
from the return code which manager succeeded
and which failed (the failing manager fails
because it can not set a value of PVC for an
existing object).
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RFC 1382 X.25 Packet Layer MIB November 1992
An entry in the closed or invalid state may
be deleted or reused at the agent's
convence. If the entry is kept in the
closed state, the values of the parameters
associated with the entry must be correct.
Closed implies the values in the circuit
table are correct.
The value of invalid indicates the other
values in the table are invalid. Many
agents may never return a value of invalid
because they dynamically allocate and free
unused table entries. An agent for a
statically configured systems can return
invalid to indicate the entry has not yet
been used so the counters contain no
information."
REFERENCE "See ISO 8208,
table 33 for (p<n>) state table"
::= { x25CircuitEntry 3 }
x25CircuitEstablishTime OBJECT-TYPE
SYNTAX TimeTicks
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of sysUpTime when the channel was
associated with this circuit. For outgoing
SVCs, this is the time the first call packet
was sent. For incoming SVCs, this is the
time the call indication was received. For
PVCs this is the time the PVC was able to
pass data to a higher layer entity without
loss of data."
::= { x25CircuitEntry 4 }
x25CircuitDirection OBJECT-TYPE
SYNTAX INTEGER {
incoming (1),
outgoing (2),
pvc (3)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The direction of the call that established
this circuit."
REFERENCE "10733 direction"
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RFC 1382 X.25 Packet Layer MIB November 1992
DEFVAL { pvc }
::= { x25CircuitEntry 5 }
-- X25 Circuit data flow statistics
x25CircuitInOctets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of octets of user data delivered
to upper layer."
REFERENCE "5.11 octetsReceivedCounter"
::= { x25CircuitEntry 6 }
x25CircuitInPdus OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of PDUs received for this
circuit."
REFERENCE "10733 5.11 dataPacketsReceived"
::= { x25CircuitEntry 7 }
x25CircuitInRemotelyInitiatedResets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Resets received for this
circuit with cause code of DTE initiated."
REFERENCE "10733 remotelyInitiatedResets"
::= { x25CircuitEntry 8 }
x25CircuitInProviderInitiatedResets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of Resets received for this
circuit with cause code other than DTE
initiated."
REFERENCE "10733 ProviderInitiatedResets"
::= { x25CircuitEntry 9 }
x25CircuitInInterrupts OBJECT-TYPE
SYNTAX Counter
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RFC 1382 X.25 Packet Layer MIB November 1992
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of interrupt packets received
for this circuit."
REFERENCE "10733 interruptPacketsReceived"
::= { x25CircuitEntry 10 }
x25CircuitOutOctets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of octets of user data sent for
this circuit."
REFERENCE "10733 5.11 octetsSentCounter"
::= { x25CircuitEntry 11 }
x25CircuitOutPdus OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of PDUs sent for this circuit."
REFERENCE "10733 5.11 dataPacketsSent"
::= { x25CircuitEntry 12 }
x25CircuitOutInterrupts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of interrupt packets sent on
this circuit."
REFERENCE "10733 interruptPacketsSent"
::= { x25CircuitEntry 13 }
-- X25 circuit timer statistics
x25CircuitDataRetransmissionTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the T25 data
retransmission timer expired for this
circuit."
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RFC 1382 X.25 Packet Layer MIB November 1992
REFERENCE "10733 5.11 dataRetransmissionTimerExpiries"
::= { x25CircuitEntry 14 }
x25CircuitResetTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the T22 reset timer
expired for this circuit."
REFERENCE "10733 5.11 resetTimeouts"
::= { x25CircuitEntry 15 }
x25CircuitInterruptTimeouts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times the T26 Interrupt timer
expired for this circuit."
REFERENCE "10733 interruptTimerExpiries"
::= { x25CircuitEntry 16 }
x25CircuitCallParamId OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"This identifies the instance of the
x25CallParmIndex for the entry in the
x25CallParmTable which contains the call
parameters in use with this circuit. The
entry referenced must contain the values
that are currently in use by the circuit
rather than proposed values. A value of
NULL indicates the circuit is a PVC or is
using all the default parameters."
DEFVAL { {0 0} }
::= { x25CircuitEntry 17 }
x25CircuitCalledDteAddress OBJECT-TYPE
SYNTAX X121Address
ACCESS read-write
STATUS mandatory
DESCRIPTION
"For incoming calls, this is the called
address from the call indication packet.
For outgoing calls, this is the called
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RFC 1382 X.25 Packet Layer MIB November 1992
address from the call confirmation packet.
This will be zero length for PVCs."
REFERENCE "10733 calledDTEAddress"
DEFVAL { ''h }
::= { x25CircuitEntry 18 }
x25CircuitCallingDteAddress OBJECT-TYPE
SYNTAX X121Address
ACCESS read-write
STATUS mandatory
DESCRIPTION
"For incoming calls, this is the calling
address from the call indication packet.
For outgoing calls, this is the calling
address from the call confirmation packet.
This will be zero length for PVCs."
REFERENCE "10733 callingDTEAddress"
DEFVAL { ''h }
::= { x25CircuitEntry 19 }
x25CircuitOriginallyCalledAddress OBJECT-TYPE
SYNTAX X121Address
ACCESS read-write
STATUS mandatory
DESCRIPTION
"For incoming calls, this is the address in
the call Redirection or Call Deflection
Notification facility if the call was
deflected or redirected, otherwise it will
be called address from the call indication
packet. For outgoing calls, this is the
address from the call request packet. This
will be zero length for PVCs."
REFERENCE "10733 originallyCalledAddress"
DEFVAL { ''h }
::= { x25CircuitEntry 20 }
x25CircuitDescr OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"A descriptive string associated with this
circuit. This provides a place for the
agent to supply any descriptive information
it knows about the use or owner of the
circuit. The agent may return the process
identifier and user name for the process
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RFC 1382 X.25 Packet Layer MIB November 1992
using the circuit. Alternative the agent
may return the name of the configuration
entry that caused a bridge to establish the
circuit. A zero length value indicates the
agent doesn't have any additional
information."
DEFVAL { ''h }
::= { x25CircuitEntry 21 }
-- ###########################################################
-- The Cleared Circuit Table
-- ###########################################################
x25ClearedCircuitEntriesRequested OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The requested number of entries for the
agent to keep in the x25ClearedCircuit
table."
::= { x25 6 }
x25ClearedCircuitEntriesGranted OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The actual number of entries the agent will
keep in the x25ClearedCircuit Table."
::= { x25 7 }
x25ClearedCircuitTable OBJECT-TYPE
SYNTAX SEQUENCE OF X25ClearedCircuitEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A table of entries about closed circuits.
Entries must be made in this table whenever
circuits are closed and the close request or
close indication packet contains a clearing
cause other than DTE Originated or a
Diagnostic code field other than Higher
Layer Initiated disconnection-normal. An
agent may optionally make entries for normal
closes (to record closing facilities or
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RFC 1382 X.25 Packet Layer MIB November 1992
other information).
Agents will delete the oldest entry in the
table when adding a new entry would exceed
agent resources. Agents are required to
keep the last entry put in the table and may
keep more entries. The object
x25OperClearEntriesGranted returns the
maximum number of entries kept in the
table."
REFERENCE "See ISO 8208 Section 12.2.3.1.1
and 12.2.3.1.2"
::= { x25 8 }
x25ClearedCircuitEntry OBJECT-TYPE
SYNTAX X25ClearedCircuitEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Information about a cleared circuit."
INDEX { x25ClearedCircuitIndex }
::= { x25ClearedCircuitTable 1 }
X25ClearedCircuitEntry ::= SEQUENCE {
x25ClearedCircuitIndex
PositiveInteger,
x25ClearedCircuitPleIndex
IfIndexType,
x25ClearedCircuitTimeEstablished
TimeTicks,
x25ClearedCircuitTimeCleared
TimeTicks,
x25ClearedCircuitChannel
INTEGER,
x25ClearedCircuitClearingCause
INTEGER,
x25ClearedCircuitDiagnosticCode
INTEGER,
x25ClearedCircuitInPdus
Counter,
x25ClearedCircuitOutPdus
Counter,
x25ClearedCircuitCalledAddress
X121Address,
x25ClearedCircuitCallingAddress
X121Address,
x25ClearedCircuitClearFacilities
OCTET STRING
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RFC 1382 X.25 Packet Layer MIB November 1992
}
x25ClearedCircuitIndex OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"An index that uniquely distinguishes one
entry in the clearedCircuitTable from
another. This index will start at
2147483647 and will decrease by one for each
new entry added to the table. Upon reaching
one, the index will reset to 2147483647.
Because the index starts at 2147483647 and
decreases, a manager may do a getnext on
entry zero and obtain the most recent entry.
When the index has the value of 1, the next
entry will delete all entries in the table
and that entry will be numbered 2147483647."
::= { x25ClearedCircuitEntry 1 }
x25ClearedCircuitPleIndex OBJECT-TYPE
SYNTAX IfIndexType
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of ifIndex for the PLE which
cleared the circuit that created the entry."
::= { x25ClearedCircuitEntry 2 }
x25ClearedCircuitTimeEstablished OBJECT-TYPE
SYNTAX TimeTicks
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of sysUpTime when the circuit was
established. This will be the same value
that was in the x25CircuitEstablishTime for
the circuit."
::= { x25ClearedCircuitEntry 3 }
x25ClearedCircuitTimeCleared OBJECT-TYPE
SYNTAX TimeTicks
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The value of sysUpTime when the circuit was
cleared. For locally initiated clears, this
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RFC 1382 X.25 Packet Layer MIB November 1992
will be the time when the clear confirmation
was received. For remotely initiated
clears, this will be the time when the clear
indication was received."
::= { x25ClearedCircuitEntry 4 }
x25ClearedCircuitChannel OBJECT-TYPE
SYNTAX INTEGER (0..4095)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The channel number for the circuit that was
cleared."
::= { x25ClearedCircuitEntry 5 }
x25ClearedCircuitClearingCause OBJECT-TYPE
SYNTAX INTEGER (0..255)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The Clearing Cause from the clear request
or clear indication packet that cleared the
circuit."
REFERENCE "See ISO 8208 Section 12.2.3.1.1"
::= { x25ClearedCircuitEntry 6 }
x25ClearedCircuitDiagnosticCode OBJECT-TYPE
SYNTAX INTEGER (0..255)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The Diagnostic Code from the clear request
or clear indication packet that cleared the
circuit."
REFERENCE "See ISO 8208 Section 12.2.3.1.2"
::= { x25ClearedCircuitEntry 7 }
x25ClearedCircuitInPdus OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of PDUs received on the
circuit."
::= { x25ClearedCircuitEntry 8 }
x25ClearedCircuitOutPdus OBJECT-TYPE
SYNTAX Counter
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RFC 1382 X.25 Packet Layer MIB November 1992
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of PDUs transmitted on the
circuit."
::= { x25ClearedCircuitEntry 9 }
x25ClearedCircuitCalledAddress OBJECT-TYPE
SYNTAX X121Address
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The called address from the cleared
circuit."
::= { x25ClearedCircuitEntry 10 }
x25ClearedCircuitCallingAddress OBJECT-TYPE
SYNTAX X121Address
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The calling address from the cleared
circuit."
::= { x25ClearedCircuitEntry 11 }
x25ClearedCircuitClearFacilities OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..109))
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The facilities field from the clear request
or clear indication packet that cleared the
circuit. A size of zero indicates no
facilities were present."
::= { x25ClearedCircuitEntry 12 }
-- ###########################################################
-- The Call Parameter Table
-- ###########################################################
x25CallParmTable OBJECT-TYPE
SYNTAX SEQUENCE OF X25CallParmEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
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RFC 1382 X.25 Packet Layer MIB November 1992
"These objects contain the parameters that
can be varied between X.25 calls. The
entries in this table are independent of the
PLE. There exists only one of these tables
for the entire system. The indexes for the
entries are independent of any PLE or any
circuit. Other tables reference entries in
this table. Entries in this table can be
used for default PLE parameters, for
parameters to use to place/answer a call,
for the parameters currently in use for a
circuit, or parameters that were used by a
circuit.
The number of references to a given set of
parameters can be found in the
x25CallParmRefCount object sharing the same
instance identifier with the parameters.
The value of this reference count also
affects the access of the objects in this
table. An object in this table with the
same instance identifier as the instance
identifier of an x25CallParmRefCount must be
consider associated with that reference
count. An object with an associated
reference count of zero can be written (if
its ACCESS clause allows it). An object
with an associated reference count greater
than zero can not be written (regardless of
the ACCESS clause). This ensures that a set
of call parameters being referenced from
another table can not be modified or changed
in a ways inappropriate for continued use by
that table."
::= { x25 9 }
x25CallParmEntry OBJECT-TYPE
SYNTAX X25CallParmEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Entries of x25CallParmTable."
INDEX { x25CallParmIndex }
::= { x25CallParmTable 1 }
X25CallParmEntry ::= SEQUENCE {
x25CallParmIndex
PositiveInteger,
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RFC 1382 X.25 Packet Layer MIB November 1992
x25CallParmStatus
EntryStatus,
x25CallParmRefCount
PositiveInteger,
x25CallParmInPacketSize
INTEGER,
x25CallParmOutPacketSize
INTEGER,
x25CallParmInWindowSize
INTEGER,
x25CallParmOutWindowSize
INTEGER,
x25CallParmAcceptReverseCharging
INTEGER,
x25CallParmProposeReverseCharging
INTEGER,
x25CallParmFastSelect
INTEGER,
x25CallParmInThruPutClasSize
INTEGER,
x25CallParmOutThruPutClasSize
INTEGER,
x25CallParmCug
DisplayString,
x25CallParmCugoa
DisplayString,
x25CallParmBcug
DisplayString,
x25CallParmNui
OCTET STRING,
x25CallParmChargingInfo
INTEGER,
x25CallParmRpoa
DisplayString,
x25CallParmTrnstDly
INTEGER,
x25CallParmCallingExt
DisplayString,
x25CallParmCalledExt
DisplayString,
x25CallParmInMinThuPutCls
INTEGER,
x25CallParmOutMinThuPutCls
INTEGER,
x25CallParmEndTrnsDly
OCTET STRING,
x25CallParmPriority
OCTET STRING,
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RFC 1382 X.25 Packet Layer MIB November 1992
x25CallParmProtection
DisplayString,
x25CallParmExptData
INTEGER,
x25CallParmUserData
OCTET STRING,
x25CallParmCallingNetworkFacilities
OCTET STRING,
x25CallParmCalledNetworkFacilities
OCTET STRING
}
x25CallParmIndex OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A value that distinguishes this entry from
another entry. Entries in this table are
referenced from other objects which identify
call parameters.
It is impossible to know which other objects
in the MIB reference entries in the table by
looking at this table. Because of this,
changes to parameters must be accomplished
by creating a new entry in this table and
then changing the referencing table to
identify the new entry.
Note that an agent will only use the values
in this table when another table is changed
to reference those values. The number of
other tables that reference an index object
in this table can be found in
x25CallParmRefCount. The value of the
reference count will affect the writability
of the objects as explained above.
Entries in this table which have a reference
count of zero maybe deleted at the convence
of the agent. Care should be taken by the
agent to give the NMS sufficient time to
create a reference to newly created entries.
Should a Management Station not find a free
index with which to create a new entry, it
may feel free to delete entries with a
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RFC 1382 X.25 Packet Layer MIB November 1992
reference count of zero. However in doing
so the Management Station much realize it
may impact other Management Stations."
::= { x25CallParmEntry 1 }
x25CallParmStatus OBJECT-TYPE
SYNTAX EntryStatus
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The status of this call parameter entry.
See RFC 1271 for details of usage."
::= { x25CallParmEntry 2 }
x25CallParmRefCount OBJECT-TYPE
SYNTAX PositiveInteger
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of references know by a
management station to exist to this set of
call parameters. This is the number of
other objects that have returned a value of,
and will return a value of, the index for
this set of call parameters. Examples of
such objects are the x25AdmnDefCallParamId,
x25OperDataLinkId, or x25AdmnDefCallParamId
objects defined above."
::= { x25CallParmEntry 3 }
x25CallParmInPacketSize OBJECT-TYPE
SYNTAX INTEGER (0..4096)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The maximum receive packet size in octets
for a circuit. A size of zero for a circuit
means use the PLE default size. A size of
zero for the PLE means use a default size of
128."
REFERENCE "10733 proposedPacketSize;
See ISO 8208 Section 15.2.2.1.1"
DEFVAL { 128 }
::= { x25CallParmEntry 4 }
x25CallParmOutPacketSize OBJECT-TYPE
SYNTAX INTEGER (0..4096)
ACCESS read-write
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RFC 1382 X.25 Packet Layer MIB November 1992
STATUS mandatory
DESCRIPTION
"The maximum transmit packet size in octets
for a circuit. A size of zero for a circuit
means use the PLE default size. A size of
zero for the PLE default means use a default
size of 128."
REFERENCE "10733 proposedPacketSize;
See ISO 8208 Section 15.2.2.1.1"
DEFVAL { 128 }
::= { x25CallParmEntry 5 }
x25CallParmInWindowSize OBJECT-TYPE
SYNTAX INTEGER (0..127)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The receive window size for a circuit. A
size of zero for a circuit means use the PLE
default size. A size of zero for the PLE
default means use 2."
REFERENCE "10733 proposedWindowSize;
See ISO 8208 Section 15.2.2.1.2"
DEFVAL { 2 }
::= { x25CallParmEntry 6 }
x25CallParmOutWindowSize OBJECT-TYPE
SYNTAX INTEGER (0..127)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The transmit window size for a circuit. A
size of zero for a circuit means use the PLE
default size. A size of zero for the PLE
default means use 2."
REFERENCE "10733 proposedWindowSize;
See ISO 8208 Section 15.2.2.1.2"
DEFVAL { 2 }
::= { x25CallParmEntry 7 }
x25CallParmAcceptReverseCharging OBJECT-TYPE
SYNTAX INTEGER {
default (1),
accept (2),
refuse (3),
neverAccept (4)
}
ACCESS read-write
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RFC 1382 X.25 Packet Layer MIB November 1992
STATUS mandatory
DESCRIPTION
"An enumeration defining if the PLE will
accept or refuse charges. A value of
default for a circuit means use the PLE
default value. A value of neverAccept is
only used for the PLE default and indicates
the PLE will never accept reverse charging.
A value of default for a PLE default means
refuse."
REFERENCE "10733 acceptReverseCharging"
DEFVAL { refuse }
::= { x25CallParmEntry 8 }
x25CallParmProposeReverseCharging OBJECT-TYPE
SYNTAX INTEGER {
default (1),
reverse (2),
local (3)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"An enumeration defining if the PLE should
propose reverse or local charging. The
value of default for a circuit means use the
PLE default. The value of default for the
PLE default means use local."
REFERENCE "10733 proposedPacketSize;
See ISO 8208 Section 15.2.2.6"
DEFVAL { local }
::= { x25CallParmEntry 9 }
x25CallParmFastSelect OBJECT-TYPE
SYNTAX INTEGER {
default (1),
notSpecified (2),
fastSelect (3),
restrictedFastResponse (4),
noFastSelect (5),
noRestrictedFastResponse (6)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Expresses preference for use of fast select
facility. The value of default for a
circuit is the PLE default. A value of
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RFC 1382 X.25 Packet Layer MIB November 1992
default for the PLE means noFastSelect. A
value of noFastSelect or
noRestrictedFastResponse indicates a circuit
may not use fast select or restricted fast
response."
REFERENCE "10733 fastSelect;
Sec ISO 8208 Section 15.2.2.6"
DEFVAL { noFastSelect }
::= { x25CallParmEntry 10 }
x25CallParmInThruPutClasSize OBJECT-TYPE
SYNTAX INTEGER {
tcReserved1 (1),
tcReserved2 (2),
tc75 (3),
tc150 (4),
tc300 (5),
tc600 (6),
tc1200 (7),
tc2400 (8),
tc4800 (9),
tc9600 (10),
tc19200 (11),
tc48000 (12),
tc64000 (13),
tcReserved14 (14),
tcReserved15 (15),
tcReserved0 (16),
tcNone (17),
tcDefault (18)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The incoming throughput class to negotiate.
A value of tcDefault for a circuit means use
the PLE default. A value of tcDefault for
the PLE default means tcNone. A value of
tcNone means do not negotiate throughtput
class."
REFERENCE "See ISO 8208 Section 15.2.2.2, table 18"
DEFVAL { tcNone }
::= { x25CallParmEntry 11 }
x25CallParmOutThruPutClasSize OBJECT-TYPE
SYNTAX INTEGER {
tcReserved1 (1),
tcReserved2 (2),
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RFC 1382 X.25 Packet Layer MIB November 1992
tc75 (3),
tc150 (4),
tc300 (5),
tc600 (6),
tc1200 (7),
tc2400 (8),
tc4800 (9),
tc9600 (10),
tc19200 (11),
tc48000 (12),
tc64000 (13),
tcReserved14 (14),
tcReserved15 (15),
tcReserved0 (16),
tcNone (17),
tcDefault (18)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The outgoing throughput class to negotiate.
A value of tcDefault for a circuit means use
the PLE default. A value of tcDefault for
the PLE default means use tcNone. A value
of tcNone means do not negotiate throughtput
class."
REFERENCE "See ISO 8208 Section 15.2.2.2, table 18"
DEFVAL { tcNone }
::= { x25CallParmEntry 12 }
x25CallParmCug OBJECT-TYPE
SYNTAX DisplayString (SIZE(0..4))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The Closed User Group to specify. This
consists of two or four octets containing
the characters 0 through 9. A zero length
string indicates no facility requested. A
string length of three containing the
characters DEF for a circuit means use the
PLE default, (the PLE default parameter may
not reference an entry of DEF.)"
REFERENCE "See ISO 8208 Section 15.2.2.3"
DEFVAL { ''h }
::= { x25CallParmEntry 13 }
x25CallParmCugoa OBJECT-TYPE
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RFC 1382 X.25 Packet Layer MIB November 1992
SYNTAX DisplayString (SIZE(0..4))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The Closed User Group with Outgoing Access
to specify. This consists of two or four
octets containing the characters 0 through
9. A string length of three containing the
characters DEF for a circuit means use the
PLE default (the PLE default parameters may
not reference an entry of DEF). A zero
length string indicates no facility
requested."
REFERENCE "See ISO 8208 Section 15.2.2.4"
DEFVAL { ''h }
::= { x25CallParmEntry 14 }
x25CallParmBcug OBJECT-TYPE
SYNTAX DisplayString (SIZE(0..3))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The Bilateral Closed User Group to specify.
This consists of two octets containing the
characters 0 through 9. A string length of
three containing the characters DEF for a
circuit means use the PLE default (the PLE
default parameter may not reference an entry
of DEF). A zero length string indicates no
facility requested."
REFERENCE "See ISO 8208 Section 15.2.2.5"
DEFVAL { ''h }
::= { x25CallParmEntry 15 }
x25CallParmNui OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(0..108))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The Network User Identifier facility. This
is binary value to be included immediately
after the length field. The PLE will supply
the length octet. A zero length string
indicates no facility requested. This value
is ignored for the PLE default parameters
entry."
REFERENCE "See ISO 8208 Section 15.2.2.7"
DEFVAL { ''h }
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RFC 1382 X.25 Packet Layer MIB November 1992
::= { x25CallParmEntry 16 }
x25CallParmChargingInfo OBJECT-TYPE
SYNTAX INTEGER {
default (1),
noFacility (2),
noChargingInfo (3),
chargingInfo (4)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The charging Information facility. A value
of default for a circuit means use the PLE
default. The value of default for the
default PLE parameters means use noFacility.
The value of noFacility means do not include
a facility."
REFERENCE "See ISO 8208 Section 15.2.2.8"
DEFVAL { noFacility }
::= { x25CallParmEntry 17 }
x25CallParmRpoa OBJECT-TYPE
SYNTAX DisplayString (SIZE(0..108))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The RPOA facility. The octet string
contains n * 4 sequences of the characters
0-9 to specify a facility with n entries.
The octet string containing the 3 characters
DEF for a circuit specifies use of the PLE
default (the entry for the PLE default may
not contain DEF). A zero length string
indicates no facility requested."
REFERENCE "See ISO 8208, section 15.2.2.9"
DEFVAL { ''h }
::= { x25CallParmEntry 18 }
x25CallParmTrnstDly OBJECT-TYPE
SYNTAX INTEGER (0..65537)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The Transit Delay Selection and Indication
value. A value of 65536 indicates no
facility requested. A value of 65537 for a
circuit means use the PLE default (the PLE
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RFC 1382 X.25 Packet Layer MIB November 1992
default parameters entry may not use the
value 65537). The value 65535 may only be
used to indicate the value in use by a
circuit."
REFERENCE "See ISO 8208, Section 15.2.2.13"
DEFVAL { 65536 }
::= { x25CallParmEntry 19 }
-- The following parameters are for CCITT facilities.
x25CallParmCallingExt OBJECT-TYPE
SYNTAX DisplayString (SIZE(0..40))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The Calling Extension facility. This
contains one of the following:
A sequence of hex digits with the value to
be put in the facility. These digits will be
converted to binary by the agent and put in
the facility. These octets do not include
the length octet.
A value containing the three character DEF
for a circuit means use the PLE default,
(the entry for the PLE default parameters
may not use the value DEF).
A zero length string indicates no facility
requested."
REFERENCE "See ISO 8208 Section 15.3.2.1"
DEFVAL { ''h }
::= { x25CallParmEntry 20 }
x25CallParmCalledExt OBJECT-TYPE
SYNTAX DisplayString (SIZE(0..40))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The Called Extension facility. This
contains one of the following:
A sequence of hex digits with the value to
be put in the facility. These digits will be
converted to binary by the agent and put in
the facility. These octets do not include
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RFC 1382 X.25 Packet Layer MIB November 1992
the length octet.
A value containing the three character DEF
for a circuit means use the PLE default,
(the entry for the PLE default parameters
may not use the value DEF).
A zero length string indicates no facility
requested."
REFERENCE "See ISO 8208 Section 15.3.2.2"
DEFVAL { ''h }
::= { x25CallParmEntry 21 }
x25CallParmInMinThuPutCls OBJECT-TYPE
SYNTAX INTEGER (0..17)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The minimum input throughput Class. A
value of 16 for a circuit means use the PLE
default (the PLE parameters entry may not
use this value). A value of 17 indicates no
facility requested."
REFERENCE "See ISO 8208 Section 15.3.2.3"
DEFVAL { 17 }
::= { x25CallParmEntry 22 }
x25CallParmOutMinThuPutCls OBJECT-TYPE
SYNTAX INTEGER (0..17)
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The minimum output throughput Class. A
value of 16 for a circuit means use the PLE
default (the PLE parameters entry may not
use this value). A value of 17 indicates no
facility requested."
REFERENCE "See ISO 8208 Section 15.3.2.3"
DEFVAL { 17 }
::= { x25CallParmEntry 23 }
x25CallParmEndTrnsDly OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(0..6))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The End-to-End Transit Delay to negotiate.
An octet string of length 2, 4, or 6
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contains the facility encoded as specified
in ISO/IEC 8208 section 15.3.2.4. An octet
string of length 3 containing the three
character DEF for a circuit means use the
PLE default (the entry for the PLE default
can not contain the characters DEF). A zero
length string indicates no facility
requested."
REFERENCE "See ISO 8208 Section 15.3.2.4"
DEFVAL { ''h }
::= { x25CallParmEntry 24 }
x25CallParmPriority OBJECT-TYPE
SYNTAX OCTET STRING (SIZE(0..6))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The priority facility to negotiate. The
octet string encoded as specified in ISO/IEC
8208 section 15.3.2.5. A zero length string
indicates no facility requested. The entry
for the PLE default parameters must be zero
length."
REFERENCE "See ISO 8208 Section 15.3.2.5"
DEFVAL { ''h }
::= { x25CallParmEntry 25 }
x25CallParmProtection OBJECT-TYPE
SYNTAX DisplayString (SIZE(0..108))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"A string contains the following:
A hex string containing the value for the
protection facility. This will be converted
from hex to the octets actually in the
packet by the agent. The agent will supply
the length field and the length octet is not
contained in this string.
An string containing the 3 characters DEF
for a circuit means use the PLE default (the
entry for the PLE default parameters may not
use the value DEF).
A zero length string mean no facility
requested."
REFERENCE "See ISO 8208 Section 15.3.2.5"
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DEFVAL { ''h }
::= { x25CallParmEntry 26 }
x25CallParmExptData OBJECT-TYPE
SYNTAX INTEGER {
default (1),
noExpeditedData (2),
expeditedData (3)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The Expedited Data facility to negotiate.
A value of default for a circuit means use
the PLE default value. The entry for the
PLE default parameters may not have the
value default."
REFERENCE "See ISO 8208 Section 15.3.2.7"
DEFVAL { noExpeditedData }
::= { x25CallParmEntry 27 }
x25CallParmUserData OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..128))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The call user data as placed in the packet.
A zero length string indicates no call user
data. If both the circuit call parameters
and the PLE default have call user data
defined, the data from the circuit call
parameters will be used. If only the PLE
has data defined, the PLE entry will be
used. If neither the circuit call
parameters or the PLE default entry has a
value, no call user data will be sent."
REFERENCE "See ISO 8208 Section 12.2.1.1.6, 12.2.1.2"
DEFVAL { ''h }
::= { x25CallParmEntry 28 }
x25CallParmCallingNetworkFacilities OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..108))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The calling network facilities. The
facilities are encoded here exactly as
encoded in the call packet. These
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facilities do not include the marker
facility code.
A zero length string in the entry for the
parameter to use when establishing a circuit
means use the PLE default. A zero length
string in the entry for PLE default
parameters indicates no default facilities."
REFERENCE "See ISO 8206 Section 15.1, category b"
DEFVAL { ''h }
::= { x25CallParmEntry 29 }
x25CallParmCalledNetworkFacilities OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..108))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The called network facilities. The
facilities are encoded here exactly as
encoded in the call packet. These
facilities do not include the marker
facility code.
A zero length string in the entry for the
parameter to use when establishing a circuit
means use the PLE default. A zero length
string in the entry for PLE default
parameters indicates no default facilities."
REFERENCE "See ISO 8206 Section 15.1, category c"
DEFVAL { ''h }
::= { x25CallParmEntry 30 }
-- ###########################################################
-- X.25 Traps
-- ###########################################################
x25Restart TRAP-TYPE
ENTERPRISE x25
VARIABLES { x25OperIndex }
DESCRIPTION
"This trap means the X.25 PLE sent or
received a restart packet. The restart that
brings up the link should not send a
x25Restart trap so the interface should send
a linkUp trap. Sending this trap means the
agent does not send a linkDown and linkUp
trap."
::= 1
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x25Reset TRAP-TYPE
ENTERPRISE x25
VARIABLES { x25CircuitIndex,
x25CircuitChannel }
DESCRIPTION
"If the PLE sends or receives a reset, the
agent should send an x25Reset trap."
::= 2
-- ###########################################################
-- X.25 Protocol Version Identifiers
-- ###########################################################
x25ProtocolVersion OBJECT IDENTIFIER
::= { x25 10 }
-- X.25 CCITT 1976 version.
x25protocolCcittV1976 OBJECT IDENTIFIER
::= { x25ProtocolVersion 1 }
-- X.25 CCITT 1980 version.
x25protocolCcittV1980 OBJECT IDENTIFIER
::= { x25ProtocolVersion 2 }
-- X.25 CCITT 1984 version.
x25protocolCcittV1984 OBJECT IDENTIFIER
::= { x25ProtocolVersion 3 }
-- X.25 CCITT 1988 version.
x25protocolCcittV1988 OBJECT IDENTIFIER
::= { x25ProtocolVersion 4 }
-- X.25 1987 version of ISO 8208.
x25protocolIso8208V1987 OBJECT IDENTIFIER
::= { x25ProtocolVersion 5 }
-- X.25 1989 version of ISO 8208.
x25protocolIso8208V1989 OBJECT IDENTIFIER
::= { x25ProtocolVersion 6 }
-- ###########################################################
END
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5. Appendix: Revision History
July 30 1992
The July, 1992 release (Editor's Internal Reference Number
2.14) made the following changes:
The syntax of the index objects for tables that are
congruent with the MIB-II ifTable were changed to
ifIndexType.
The x25CallParmRefCount object was added to the
x25CallParmTable.
The description of the x25CallParmTable and
x25CallParmIndex objects were changed to only allow
writing an entry with a zero reference count.
A requirement for conformance was added after the
definition of x25 in the ASN.1 definition.
June 26 1992
The June 29, 1992 release (Editor's Internal Reference Number
2.12) made the following changes:
The range of x25ChannelLIC was changed from (0..4096) to
(0..4095).
The range of x25ChannelHIC was changed from (0..4096) to
(0..4095).
The range of x25ChannelLTC was changed from (0..4096) to
(0..4095).
The range of x25ChannelHTC was changed from (0..4096) to
(0..4095).
The range of x25ChannelLOC was changed from (0..4096) to
(0..4095).
The range of x25ChannelHOC was changed from (0..4096) to
(0..4095).
The range of x25CircuitChannel was changed from (1..4096)
to (0..4095).
The range of x25ClearedCircuitChannel was changed from
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(1..4096) to (0..4095).
June 1992
The June 92 release (Editor's Internal Reference Number 2.11)
made the following changes:
A value of dxe was defined for x25AdmnInterfaceMode and
x25OperInterfaceMode.
The objects in the x25ChannelTable can now have a value
of zero to indicate no channels configured in the range.
The length of an X121Address was extended to 17 to
accommodate the 1988 CCITT X.25 standard.
Some object descriptions have been expanded and
simplified, these include: all the channel table objects
except the index, x25AdmnDataRxmtCount,
x25AdmnRejectCount, x25AdmnRegistrationRequestCount,
x25OperDataRxmtCount, x25OperRejectCount,
x25OperRegistrationRequestCount, x25CircuitEstablishTime,
x25ClearedCircuitTimeEstablished,
x25ClearedCircuitTimeCleared, x25CallParmIndex,
x25CallParmInPacketSize, x25CircuitCalledAddress,
x25CircuitOriginallCalledAddress,
x25CircuitCallingAddress, x25CallParmFastSelect,
x25CallParmCug, x25CallParmCugoa, x25CallParmBcug,
x25CallParmNui, x25CallParmRpoa, x25CallParmCallingExt,
x25CallParmCalledExt, x25CallParmProtection,
x25StatInCallRefusals and x25CallParmOutPacketSize.
The x25StatNumberPvcs object was deleted and
x25AdmnNumberPVCs and x25OperNumberPVCs objects added.
The object x25StatOutDataPackets was added.
The object x25AdmnProtocolVersionSupported as added.
The x25CircuitRemoteDteAddress was deleted.
Some ASN.1 errors were corrected.
April 1992
The April release (Editor's Internal Reference Number 2.8)
made many changes to incorporate the comments of the working
group meeting in March 1992.
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RFC 1382 X.25 Packet Layer MIB November 1992
All reference comments were changed to reference fields.
The type PositiveInteger was imported from the RFC1381-
MIB and used for all index and timer values.
The x25PleTable was split into the x25AdmnTable,
x25OperTable, and x25StatTable.
The timer and counter objects from the x25CircuitTable
were moved to the x25AdmnTable and replicated in the
x25OperTable
The objects in the x25CircuitTable were reordered to put
the non-integer objects at the end of the table for
easier implementation.
The called and calling extension character set was
extended to include a-f, and A-F.
Additional states were added to the x25CircuitStatus
object.
Additional values were added to x25CircuitDirection
x25CircuitCallParamId, and the addresses in the Circuit
Table for PVCs.
The length of the X25Address was changed to 0..15.
The objects x25ClearedCircuitTimeEstablished,
x25ClearedCircuitInPdus, and x25ClearedCircuitOutPdus
were added to the x25ClearedCircuitTable.
The name of the x25CircuitName was changed to
x25CircuitDescr and the description was expanded.
The access of the x25CircuitCallParamId was changed to
read-only.
The x25ClearedCircuitCodes object was split into the
x25ClearedCircuitClearingCause and
x25ClearedCircuitDiagnosticCode objects.
The semantics of the x25ClearedCircuitIndex was
redefined.
Some of the description clauses were changed in an
attempt to add clarity.
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RFC 1382 X.25 Packet Layer MIB November 1992
DEFVAL clauses were added to most objects in the
x25CallParmTable.
Additional text was added to the description section to
provide an overview of the tables of the MIB.
The minimum allowable value for maximum active circuits
was changed from one to zero.
February 1992
The February release (Editor's Internal Reference Number 1.14)
made many changes.
Many of the tables were combined. For example, the
x25InfoTable, x25PktStatTable, and x25TmrStatTable were
combined into the x25PleTable. The x25ConInfoTable,
x25ConStatTable, and x25ConTimrTable were combined into
the x25CircuitTable.
The objects for call parameters were drastically
reworked. All call parameters were combined in the
x25CallParmTable. Any table, such as the x25PleTable or
x25CircuitTable, that needs to reference call parameters
identifies an entry in the new table. As part of this
the x25ConDefTable was deleted and replaced with the
x25PleDefCallParamId.
The x25PvcTable was deleted; the x25CircuitStatus object
provides similar information about PVCs.
The x25ClearedCircuitTable was added to record the status
code of cleared circuits.
Many object definitions were restructured. For example,
the time units for timers was changed from 1/100ths of a
second to milliseconds. Some indexes into tables were
replaced with object identifiers.
Much of the introductory text was changed and the
references were changed to match.
October 1991
The October release (Editor Internal Reference Number 1.10)
made the following changes:
Changed x25ConInfoStatus to clarify the description and
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RFC 1382 X.25 Packet Layer MIB November 1992
the pvcResetting(5) value was changed to pvcResetting(6)
to avoid a conflict with a previous use of the number 5.
The name of the counter object
x25TmrStatRetryCountsExceeded was changed to
x25TmrStatRetryCountExceededs.
The name of the counter object
x25TmrStatClearCountsExceeded was changed to
x25TmrStatClearCountExceededs.
All occurrence of Guage was changed to Gauge.
Added the x25CallFcltyTable, x25CallFcltyCcittTable, and
x25CallParamTable.
June 1991
The June release corrected some syntax errors and cleaned up
some other minor things.
April 1991
The April 26 release of this document was the first release.
That version was derived from the ISO work on network layer
management as presented in ISO/IEC 10733 [11]
6. Acknowledgements
This document was produced by the x25mib working group:
Fred Baker, ACC
Art Berggreen, ACC
Frank Bieser
Gary Bjerke, Tandem
Bill Bowman, HP
Christopher Bucci, Datability
Charles Carvalho, ACC
Jeff Case, Snmp Research
Angela Chen, HP
Carson Cheung, BNR
Tom Daniel, Spider Systems
Chuck Davin, MIT
Billy Durham, Honeywell
Richard Fox, Synoptics
Doug Geller, Data General
Herve Goguely, LIR Corp
Andy Goldthorpe, british-telecom
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RFC 1382 X.25 Packet Layer MIB November 1992
Walter D. Guilarte
David Gurevich
Steve Huston, Process Software Corporation
Jon Infante, ICL
Frank Kastenholz, Clearpoint
Zbigniew Kielczewski, Eicon
Cheryl Krupezak, Georgia Tech
Mats Lindstrom, Diab Data AB
Andrew Malis, BBN
Evan McGinnis, 3Com
Gary (G.P.)Mussar, BNR
Chandy Nilakantan, 3Com
Randy Pafford, Data General
Ragnar Paulson, The Software Group Limited
Dave Perkins, Synoptics
Walter Pinkarschewsky, DEC
Karen Quidley, Data General
Chris Ranch, Novell
Paul S. Rarey, DHL Systems Inc.
Jim Roche, Newbridge Research
Philippe Roger, LIR Corp.
Timon Sloane
Mike Shand, DEC
Brad Steina, Microcom
Bob Stewart, Xyplex
Tom Sullivan, Data General
Rodney Thayer, Sable Technology Corporation
Mark Therieau, Microcom
Jane Thorn, Data General
Dean Throop, Data General
Maurice Turcotte, Racal Datacom
Mike Zendels, Data General
In addition, the contributions of the following individuals are also
acknowledged:
John Harper, DEC
Chairman of the ISO committee for
Network Level Management Information
7. References
[1] Rose M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based internets", STD 16, RFC
1155, Performance Systems International, Hughes LAN Systems, May
1990.
[2] McCloghrie K., and M. Rose, "Management Information Base for
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RFC 1382 X.25 Packet Layer MIB November 1992
Network Management of TCP/IP-based internets", RFC 1156, Hughes
LAN Systems, Performance Systems International, May 1990.
[3] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
Network Management Protocol", STD 15, RFC 1157, SNMP Research,
Performance Systems International, Performance Systems
International, MIT Laboratory for Computer Science, May 1990.
[4] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions",
STD 16, RFC 1212, Performance Systems International, Hughes LAN
Systems, March 1991.
[5] Rose M., Editor, "Management Information Base for Network
Management of TCP/IP-based internets: MIB-II", STD 17, RFC 1213,
Performance Systems International, March 1991.
[6] Information processing systems - Open Systems Interconnection -
Specification of Abstract Syntax Notation One (ASN.1),
International Organization for Standardization, International
Standard 8824, December 1987.
[7] Information processing systems - Open Systems Interconnection -
Specification of Basic Encoding Rules for Abstract Notation One
(ASN.1), International Organization for Standardization,
International Standard 8825, December 1987.
[8] Stewart, B., Editor, "Definitions of Managed Objects for RS-232-
like Hardware Devices", RFC 1317, Xyplex, Inc., April 1992.
[9] Throop, D., Editor, "SNMP MIB extension for LAPB", RFC 1381, Data
General Corporation, November 1992.
[10] "Information technology - - Data communication - X.25 Packet
layer Protocol for Data Terminal Equipment", International
Organization for Standardization, International Standard 8208,
March 1990.
[11] "Information Technology - Telecommunications and information
exchange between systems - Elements of Management Information
Related to OSI network Layer Standards", Committee Draft
International Standard 10733, November 1990.
8. Security Considerations
Security issues are not discussed in this memo.
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9. Authors' Addresses
Dean D. Throop
Data General Corporation
62 Alexander Dr.
Research Triangle Park, NC 27709
Phone: (919)248-8421
EMail: throop@dg-rtp.dg.com
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ERRATA
