-- Network Working Group D. Throop
-- Request for Comments: 1381 Data General Corporation
-- F. Baker
-- Advanced Computer Communications
-- November 1992
--
--
-- SNMP MIB Extension for X.25 LAPB
--RFC1381-MIB DEFINITIONS::=BEGINIMPORTSCounterFROM RFC1155-SMI
transmission
FROM RFC1213-MIB
OBJECT-TYPEFROM RFC-1212;-- LAPB MIBlapb OBJECTIDENTIFIER::={ transmission 16}PositiveInteger::=INTEGER(0..2147483647)IfIndexType::=INTEGER(1..2147483647)-- IfIndexType specifies an index object for a table-- with entries that match entries in the MIB-II ifTable.-- The value of the index for the table will match the-- ifIndex entry for same interface in the ifTable.-- The values of this object range from 1 to ifNumber-- inclusive.-- ###########################################################-- LAPB Admn Table-- ###########################################################-- Support of the lapbAdmnTable is mandatory for all-- agents of systems that implement LAPB.lapbAdmnTable OBJECT-TYPESYNTAXSEQUENCEOF LapbAdmnEntry
ACCESSnot-accessibleSTATUSmandatoryDESCRIPTION"This table contains objects that can be
changed to manage a LAPB interface.
Changing one of these parameters may take
effect in the operating LAPB immediately or
may wait until the interface is restarted
depending on the details of the
implementation.
Most of the objects in this read-write table
have corresponding read-only objects in the
lapbOperTable that return the current
operating value.
The operating values may be different from
these configured values if changed by XID
negotiation or if a configured parameter was
changed after the interface was started."::={ lapb 1}lapbAdmnEntry OBJECT-TYPESYNTAX LapbAdmnEntry
ACCESSnot-accessibleSTATUSmandatoryDESCRIPTION"Configured parameter values for a specific
LAPB."INDEX{ lapbAdmnIndex }
::={ lapbAdmnTable 1}
LapbAdmnEntry ::=SEQUENCE{
lapbAdmnIndex
IfIndexType,
lapbAdmnStationType
INTEGER,
lapbAdmnControlField
INTEGER,
lapbAdmnTransmitN1FrameSize
PositiveInteger,
lapbAdmnReceiveN1FrameSize
PositiveInteger,
lapbAdmnTransmitKWindowSize
INTEGER,
lapbAdmnReceiveKWindowSize
INTEGER,
lapbAdmnN2RxmitCount
INTEGER,
lapbAdmnT1AckTimer
PositiveInteger,
lapbAdmnT2AckDelayTimer
PositiveInteger,
lapbAdmnT3DisconnectTimer
PositiveInteger,
lapbAdmnT4IdleTimer
PositiveInteger,
lapbAdmnActionInitiate
INTEGER,
lapbAdmnActionRecvDM
INTEGER}lapbAdmnIndex OBJECT-TYPESYNTAXIfIndexTypeACCESSread-onlySTATUSmandatoryDESCRIPTION"The ifIndex value for the LAPB interface."::={ lapbAdmnEntry 1}lapbAdmnStationType OBJECT-TYPESYNTAXINTEGER{dte (1),dce (2),dxe (3)}ACCESSread-writeSTATUSmandatoryDESCRIPTION"Identifies the desired station type of this
interface."REFERENCE"ISO 7776 section 3.1"DEFVAL{ dte }
::={ lapbAdmnEntry 2}lapbAdmnControlField OBJECT-TYPESYNTAXINTEGER{modulo8 (1),modulo128 (2)}ACCESSread-writeSTATUSmandatoryDESCRIPTION"The desired size of the sequence numbers
used to number frames."REFERENCE"ISO 8885 Table 3, Name: HDLC Option - 10"DEFVAL{ modulo8 }::={ lapbAdmnEntry 3}lapbAdmnTransmitN1FrameSize OBJECT-TYPESYNTAXPositiveIntegerACCESSread-writeSTATUSmandatoryDESCRIPTION"The default maximum N1 frame size desired
in number of bits for a frame transmitted by
this DTE. This excludes flags and 0 bits
inserted for transparency."REFERENCE"ISO 8885 Table 3,
Name: Information Field length"DEFVAL{36000}-- 4500 * 8; 802.5 Frame size::={ lapbAdmnEntry 4}lapbAdmnReceiveN1FrameSize OBJECT-TYPESYNTAXPositiveIntegerACCESSread-writeSTATUSmandatoryDESCRIPTION"The default maximum N1 frame size desired
in number of bits for a frame the DCE/remote
DTE transmits to this DTE. This excludes
flags and 0 bits inserted for transparency."DEFVAL{36000}-- 4500 * 8; 802.5 Frame size::={ lapbAdmnEntry 5}lapbAdmnTransmitKWindowSize OBJECT-TYPESYNTAXINTEGER(1..127)
ACCESSread-writeSTATUSmandatoryDESCRIPTION"The default transmit window size for this
Interface. This is the maximum number of
unacknowledged sequenced PDUs that may be
outstanding from this DTE at any one time."REFERENCE"ISO 8885 Table 3, Name: Window size"DEFVAL{7}::={ lapbAdmnEntry 6}lapbAdmnReceiveKWindowSize OBJECT-TYPESYNTAXINTEGER(1..127)ACCESSread-writeSTATUSmandatoryDESCRIPTION"The default receive window size for this
Interface. This is the maximum number of
unacknowledged sequenced PDUs that may be
outstanding from the DCE/remote DTE at any
one time."REFERENCE"ISO 8885 Table 3, Name: Window size"
DEFVAL{7}::={ lapbAdmnEntry 7}lapbAdmnN2RxmitCount OBJECT-TYPESYNTAXINTEGER(0..65535)ACCESSread-writeSTATUSmandatoryDESCRIPTION"The default N2 retry counter for this
interface. This specifies the number of
times a PDU will be resent after the T1
timer expires without an acknowledgement for
the PDU."REFERENCE"ISO 8885 Table 3,
Name: Retransmission Attempts"DEFVAL{20}::={ lapbAdmnEntry 8}lapbAdmnT1AckTimer OBJECT-TYPESYNTAXPositiveIntegerACCESSread-writeSTATUSmandatory
DESCRIPTION"The default T1 timer for this interface.
This specifies the maximum time in
Milliseconds to wait for acknowledgment of a
PDU."REFERENCE"ISO 8885 Table 3, Name:
Acknowledgement timer"DEFVAL{3000}::={ lapbAdmnEntry 9}lapbAdmnT2AckDelayTimer OBJECT-TYPESYNTAXPositiveIntegerACCESSread-writeSTATUSmandatoryDESCRIPTION"The default T2 timer for this interface.
This specifies the maximum time in
Milliseconds to wait before sending an
acknowledgment for a sequenced PDU. A value
of zero means there will be no delay in
acknowledgement generation."REFERENCE"ISO 8885 Table 3,
Name: Reply delay timer"DEFVAL{0}::={ lapbAdmnEntry 10}
lapbAdmnT3DisconnectTimer OBJECT-TYPESYNTAXPositiveIntegerACCESSread-writeSTATUSmandatoryDESCRIPTION"The T3 timer for this interface. This
specifies the time in Milliseconds to wait
before considering the link disconnected. A
value of zero indicates the link will be
considered disconnected upon completion of
the frame exchange to disconnect the link."REFERENCE"ISO 7776 section 5.7.1.3"DEFVAL{60000}::={ lapbAdmnEntry 11}lapbAdmnT4IdleTimer OBJECT-TYPESYNTAXPositiveIntegerACCESSread-writeSTATUSmandatoryDESCRIPTION"The T4 timer for this interface. This
specifies the maximum time in Milliseconds
to allow without frames being exchanged on
the data link. A value of 2147483647
indicates no idle timer is being kept."REFERENCE"ISO 7776 section 5.7.1.4"DEFVAL{2147483647}::={ lapbAdmnEntry 12}lapbAdmnActionInitiate OBJECT-TYPESYNTAXINTEGER{sendSABM (1),sendDISC (2),sendDM (3),none (4),other (5)}ACCESSread-writeSTATUSmandatoryDESCRIPTION"This identifies the action LAPB will take
to initiate link set-up."DEFVAL{ sendSABM }::={ lapbAdmnEntry 13}
lapbAdmnActionRecvDM OBJECT-TYPESYNTAXINTEGER{sendSABM (1),sendDISC (2),other (3)}ACCESSread-writeSTATUSmandatoryDESCRIPTION"This identifies the action LAPB will take
when it receives a DM response."DEFVAL{ sendSABM }::={ lapbAdmnEntry 14}-- ###########################################################-- LAPB operating parameters.-- ###########################################################-- Support of the lapbOperTable is mandatory for all-- agents of systems that implement LAPB.lapbOperTable OBJECT-TYPESYNTAXSEQUENCEOF LapbOperEntry
ACCESSnot-accessibleSTATUSmandatoryDESCRIPTION"This table contains configuration
information about interface parameters
currently set in the interface. Many of
these objects have corresponding objects in
the lapbAdmnTable."::={ lapb 2}lapbOperEntry OBJECT-TYPESYNTAX LapbOperEntry
ACCESSnot-accessibleSTATUSmandatoryDESCRIPTION"Currently set parameter values for a
specific LAPB."INDEX{ lapbOperIndex }::={ lapbOperTable 1}
LapbOperEntry ::=SEQUENCE{
lapbOperIndex
IfIndexType,
lapbOperStationType
INTEGER,
lapbOperControlField
INTEGER,
lapbOperTransmitN1FrameSize
PositiveInteger,
lapbOperReceiveN1FrameSize
PositiveInteger,
lapbOperTransmitKWindowSize
INTEGER,
lapbOperReceiveKWindowSize
INTEGER,
lapbOperN2RxmitCount
INTEGER,
lapbOperT1AckTimer
PositiveInteger,
lapbOperT2AckDelayTimer
PositiveInteger,
lapbOperT3DisconnectTimer
PositiveInteger,
lapbOperT4IdleTimer
PositiveInteger,
lapbOperPortId
OBJECTIDENTIFIER,
lapbOperProtocolVersionId
OBJECTIDENTIFIER}lapbOperIndex OBJECT-TYPESYNTAXIfIndexTypeACCESSread-onlySTATUSmandatory
DESCRIPTION"The ifIndex value for the LAPB interface."::={ lapbOperEntry 1}lapbOperStationType OBJECT-TYPESYNTAXINTEGER{dte (1),dce (2),dxe (3)}ACCESSread-onlySTATUSmandatoryDESCRIPTION"Identifies the current operating station
type of this interface. A value of dxe (3)
indicates XID negotiation has not yet taken
place."REFERENCE"ISO 7776 section 3.1"::={ lapbOperEntry 2}lapbOperControlField OBJECT-TYPESYNTAXINTEGER{modulo8 (1),
modulo128 (2)}ACCESSread-onlySTATUSmandatoryDESCRIPTION"The current operating size of the sequence
numbers used to number frames."REFERENCE"ISO 7776 section 3.3"::={ lapbOperEntry 3}lapbOperTransmitN1FrameSize OBJECT-TYPESYNTAXPositiveIntegerACCESSread-onlySTATUSmandatoryDESCRIPTION"The current operating N1 frame size used
for the maximum number of bits in a frame
this DTE can transmit. This excludes flags
and 0 bits inserted for transparency."REFERENCE"ISO 7776 section 5.7.3"::={ lapbOperEntry 4}lapbOperReceiveN1FrameSize OBJECT-TYPESYNTAXPositiveInteger
ACCESSread-onlySTATUSmandatory-- See lapbOperTransmitN1FrameSize aboveDESCRIPTION"The current operating N1 frame size used
for the maximum number of bits in a frame
the DCE/remote DTE can transmit. This
excludes flags and 0 bits inserted for
transparency."::={ lapbOperEntry 5}lapbOperTransmitKWindowSize OBJECT-TYPESYNTAXINTEGER(1..127)ACCESSread-onlySTATUSmandatoryDESCRIPTION"The current PDU window size this Interface
uses to transmit. This is the maximum
number of unacknowledged sequenced PDUs that
may be outstanding from this DTE at any one
time."REFERENCE"ISO 7776 section 5.7.4"::={ lapbOperEntry 6}
lapbOperReceiveKWindowSize OBJECT-TYPESYNTAXINTEGER(1..127)ACCESSread-onlySTATUSmandatoryDESCRIPTION"The current receive PDU window size for
this Interface. This is the maximum number
of unacknowledged sequenced PDUs that may be
outstanding from the DCE/remote DTE at any
one time."REFERENCE"ISO 7776 section 5.7.4"::={ lapbOperEntry 7}lapbOperN2RxmitCount OBJECT-TYPESYNTAXINTEGER(0..65535)ACCESSread-onlySTATUSmandatoryDESCRIPTION"The current N2 retry counter used for this
interface. This specifies the number of
times a PDU will be resent after the T1
timer expires without an acknowledgement for
the PDU."REFERENCE"ISO 7776 section 5.7.2"::={ lapbOperEntry 8}lapbOperT1AckTimer OBJECT-TYPESYNTAXPositiveIntegerACCESSread-onlySTATUSmandatoryDESCRIPTION"The current T1 timer for this interface.
This specifies the maximum time in
Milliseconds to wait for acknowledgment of a
PDU."REFERENCE"ISO 7776 section 5.7.1.1"::={ lapbOperEntry 9}lapbOperT2AckDelayTimer OBJECT-TYPESYNTAXPositiveIntegerACCESSread-onlySTATUSmandatoryDESCRIPTION"The current T2 timer for this interface.
This specifies the maximum time in
Milliseconds to wait before sending an
acknowledgment for a sequenced PDU. A value
of zero means there will be no delay in
acknowledgement generation."REFERENCE"ISO 7776 section 5.7.1.2"::={ lapbOperEntry 10}lapbOperT3DisconnectTimer OBJECT-TYPESYNTAXPositiveIntegerACCESSread-onlySTATUSmandatoryDESCRIPTION"The current T3 timer for this interface.
This specifies the time in Milliseconds to
wait before considering the link
disconnected. A value of zero indicates the
link will be considered disconnected upon
completion of the frame exchange to
disconnect the link."REFERENCE"ISO 7776 section 5.7.1.3"::={ lapbOperEntry 11}lapbOperT4IdleTimer OBJECT-TYPESYNTAXPositiveIntegerACCESSread-writeSTATUSmandatoryDESCRIPTION"The current T4 timer for this interface.
This specifies the maximum time in
Milliseconds to allow without frames being
exchanged on the data link. A value of
2147483647 indicates no idle timer is being
kept."REFERENCE"ISO 7776 section 5.7.1.4"::={ lapbOperEntry 12}lapbOperPortId OBJECT-TYPESYNTAXOBJECTIDENTIFIERACCESSread-onlySTATUSmandatoryDESCRIPTION"This object identifies an instance of the
index object in the first group of objects
in the MIB specific to the physical device
or interface used to send and receive
frames. If an agent does not support any
such objects, it should return nullSpec
OBJECT IDENTIFIER {0 0}."::={ lapbOperEntry 13}lapbOperProtocolVersionId OBJECT-TYPESYNTAXOBJECTIDENTIFIERACCESSread-only
STATUSmandatoryDESCRIPTION"This object identifies the version of the
lapb protocol implemented by this
interface."::={ lapbOperEntry 14}-- ###########################################################-- LAPB Flow Table-- ###########################################################-- Support of the lapbFlowTable is mandatory for all-- agents of systems that implement LAPB.lapbFlowTable OBJECT-TYPESYNTAXSEQUENCEOF LapbFlowEntry
ACCESSnot-accessibleSTATUSmandatoryDESCRIPTION"This table defines the objects recorded by
LAPB to provide information about the
traffic flow through the interface."::={ lapb 3}lapbFlowEntry OBJECT-TYPESYNTAX LapbFlowEntry
ACCESSnot-accessible
STATUSmandatoryDESCRIPTION"The information regarding the effects of
flow controls in LAPB."INDEX{ lapbFlowIfIndex }::={ lapbFlowTable 1}
LapbFlowEntry ::=SEQUENCE{
lapbFlowIfIndex
IfIndexType,
lapbFlowStateChanges
Counter,
lapbFlowChangeReason
INTEGER,
lapbFlowCurrentMode
INTEGER,
lapbFlowBusyDefers
Counter,
lapbFlowRejOutPkts
Counter,
lapbFlowRejInPkts
Counter,
lapbFlowT1Timeouts
Counter,
lapbFlowFrmrSent
OCTETSTRING,
lapbFlowFrmrReceived
OCTETSTRING,
lapbFlowXidReceived
OCTETSTRING}lapbFlowIfIndex OBJECT-TYPESYNTAXIfIndexTypeACCESSread-onlySTATUSmandatoryDESCRIPTION"The ifIndex value for the LAPB Interface."::={ lapbFlowEntry 1}lapbFlowStateChanges OBJECT-TYPESYNTAXCounterACCESSread-onlySTATUSmandatoryDESCRIPTION"The number of LAPB State Changes, including
resets."::={ lapbFlowEntry 2}lapbFlowChangeReason OBJECT-TYPESYNTAXINTEGER{notStarted (1),-- Initial stateabmEntered (2),-- SABM or UA
abmeEntered (3),-- SABME or UAabmReset (4),-- SABM in ABMabmeReset (5),-- SABME in ABMEdmReceived (6),-- DM ResponsedmSent (7),-- DM sentdiscReceived (8),-- DISC ResponsediscSent (9),-- DISC SentfrmrReceived (10),-- FRMR ReceivedfrmrSent (11),-- FRMR Sentn2Timeout (12),-- N2 Timer Expiredother (13)
}ACCESSread-onlySTATUSmandatoryDESCRIPTION"The reason for the most recent incrementing
of lapbFlowStateChanges. A DM or DISC frame
generated to initiate link set-up does not
alter this object. When the MIB-II object
ifOperStatus does not have a value of
testing, there exists a correlation between
this object and ifOperStatus. IfOperStatus
will have a value of up when this object
contains: abmEntered, abmeEntered,
abmReset, or abmeReset. IfOperStatus will
have a value of down when this object has a
value of notStarted, or dmReceived through
n2Timeout. There is no correlation when
this object has the value other."::={ lapbFlowEntry 3}lapbFlowCurrentMode OBJECT-TYPESYNTAXINTEGER{disconnected (1),-- initial state or DISC received
linkSetup (2),-- SABM sentframeReject (3),-- Invalid frame received and-- FRMR sentdisconnectRequest (4),-- DISC sentinformationTransfer (5),-- normal information transfer state-- SABM(E) sent and UA received, or-- SABM(E) received and UA sentrejFrameSent (6),-- invalid NS received and REJ sentwaitingAcknowledgement (7),-- T1 expired and RR sentstationBusy (8),-- RNR sentremoteStationBusy (9),
-- RNR receivedbothStationsBusy (10),-- RNR received and RNR sentwaitingAckStationBusy (11),-- T1 expired, RNR sentwaitingAckRemoteBusy (12),-- T1 expired, RNR receivedwaitingAckBothBusy (13),-- T1 expired, RNR sent,-- and RNR receivedrejFrameSentRemoteBusy (14),-- REJ sent and RNR receivedxidFrameSent (15),-- XID frame senterror (16),-- An error state other than-- a one defined aboveother (17)
-- A state not listed above}ACCESSread-onlySTATUSmandatoryDESCRIPTION"The current condition of the conversation."::={ lapbFlowEntry 4}lapbFlowBusyDefers OBJECT-TYPESYNTAXCounterACCESSread-onlySTATUSmandatoryDESCRIPTION"The number of times this device was unable
to transmit a frame due to a perceived
remote busy condition. Busy conditions can
result from the receipt of an RNR from the
remote device, the lack of valid sequence
number space (window saturation), or other
conditions."::={ lapbFlowEntry 5}lapbFlowRejOutPkts OBJECT-TYPESYNTAXCounterACCESSread-only
STATUSmandatoryDESCRIPTION"The number of REJ or SREJ frames sent by
this station."::={ lapbFlowEntry 6}lapbFlowRejInPkts OBJECT-TYPESYNTAXCounterACCESSread-onlySTATUSmandatoryDESCRIPTION"The number of REJ or SREJ frames received
by this station."::={ lapbFlowEntry 7}lapbFlowT1Timeouts OBJECT-TYPESYNTAXCounterACCESSread-onlySTATUSmandatoryDESCRIPTION"The number of times a re-transmission was
effected by the T1 Timer expiring."::={ lapbFlowEntry 8}lapbFlowFrmrSent OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..7))
ACCESSread-onlySTATUSmandatoryDESCRIPTION"The Information Field of the FRMR most
recently sent. If no FRMR has been sent
(the normal case) or the information isn't
available, this will be an OCTET STRING of
zero length."REFERENCE"ISO 7776 Section 4.3.9, tables 7 and 8"::={ lapbFlowEntry 9}lapbFlowFrmrReceived OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..7))ACCESSread-onlySTATUSmandatoryDESCRIPTION"The Information Field of the FRMR most
recently received. If no FRMR has been
received (the normal case) or the
information isn't available, this will be an
OCTET STRING of zero length."REFERENCE"ISO 7776 Section 4.3.9, tables 7 and 8"::={ lapbFlowEntry 10}lapbFlowXidReceived OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..8206))ACCESSread-onlySTATUSmandatoryDESCRIPTION"The Information Field of the XID frame most
recently received. If no XID frame has been
received, this will be an OCTET STRING of
zero length."REFERENCE"ISO 8885"::={ lapbFlowEntry 11}-- ###########################################################-- LAPB XID Table-- ###########################################################-- Support for the lapbXidTable is mandatory for all agents-- of systems that have a LAPB implementation using XID
-- negotiation. Agents of systems without XID negotiation-- support should not implement this table.lapbXidTable OBJECT-TYPESYNTAXSEQUENCEOF LapbXidEntry
ACCESSnot-accessibleSTATUSmandatoryDESCRIPTION"This table defines values to use for XID
negotiation that are not found in the
lapbAdmnTable. This table is optional for
implementations that don't support XID and
mandatory for implementations that do
initiate XID negotiation."::={ lapb 4}lapbXidEntry OBJECT-TYPESYNTAX LapbXidEntry
ACCESSnot-accessibleSTATUSmandatoryDESCRIPTION"XId negotiation parameter values for a
specific LAPB."INDEX{ lapbXidIndex }::={ lapbXidTable 1}
LapbXidEntry ::=SEQUENCE{
lapbXidIndex
IfIndexType,
lapbXidAdRIdentifier
OCTETSTRING,
lapbXidAdRAddress
OCTETSTRING,
lapbXidParameterUniqueIdentifier
OCTETSTRING,
lapbXidGroupAddress
OCTETSTRING,
lapbXidPortNumber
OCTETSTRING,
lapbXidUserDataSubfield
OCTETSTRING}lapbXidIndex OBJECT-TYPESYNTAXIfIndexTypeACCESSread-onlySTATUSmandatoryDESCRIPTION"The ifIndex value for the LAPB interface."::={ lapbXidEntry 1}lapbXidAdRIdentifier OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..255))
ACCESSread-writeSTATUSmandatoryDESCRIPTION"The value of the Address Resolution
Identifier. A zero length string indicates
no Identifier value has been assigned."REFERENCE"ISO 8885 Table 2, Name: Identifier"DEFVAL{ ''h }::={ lapbXidEntry 2}lapbXidAdRAddress OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..255))ACCESSread-writeSTATUSmandatoryDESCRIPTION"The value of the Address Resolution
Address. A zero length string indicates no
Address value has been assigned."
REFERENCE"ISO 8885 Table 2, Name: Address"DEFVAL{ ''h }::={ lapbXidEntry 3}lapbXidParameterUniqueIdentifier OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..255))ACCESSread-writeSTATUSmandatoryDESCRIPTION"The value of the parameter unique
Identifier. A zero length string indicates
no Unique identifier value has been
assigned."REFERENCE"ISO 8885 Table 3, Name: Identifier"DEFVAL{ ''h }::={ lapbXidEntry 4}lapbXidGroupAddress OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..255))
ACCESSread-writeSTATUSmandatoryDESCRIPTION"The value of the parameter Group address.
A zero length string indicates no Group
address value has been assigned."REFERENCE"ISO 8885 Table 3, Name: Group address"DEFVAL{ ''h }::={ lapbXidEntry 5}lapbXidPortNumber OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..255))ACCESSread-writeSTATUSmandatoryDESCRIPTION"The port number assigned for this link. A
zero length string indicates no local port
number identifier has been assigned."REFERENCE"ISO 8885 Table 3, Name: Port number"DEFVAL{ ''h }
::={ lapbXidEntry 6}lapbXidUserDataSubfield OBJECT-TYPESYNTAXOCTETSTRING(SIZE(0..8206))ACCESSread-writeSTATUSmandatoryDESCRIPTION"A user data subfield, if any, to be
transmitted in an XID frame. A zero length
frame indicates no user data subfield has
been assigned. The octet string should
include both the User data identifier and
User data field as shown in Figures 1 and
4."REFERENCE"ISO 8885 section 4.3"DEFVAL{ ''h }::={ lapbXidEntry 7}-- ###########################################################-- LAPB protocol versions-- ###########################################################lapbProtocolVersion OBJECTIDENTIFIER
::={ lapb 5}lapbProtocolIso7776v1986 OBJECTIDENTIFIER::={ lapbProtocolVersion 1}lapbProtocolCcittV1980 OBJECTIDENTIFIER::={ lapbProtocolVersion 2}lapbProtocolCcittV1984 OBJECTIDENTIFIER::={ lapbProtocolVersion 3}-- The following describes some of the MIB-II interface-- objects and their relationship with the objects in this-- MIB extension.-- ifDescr: describes the interface. It should include-- identification information for the physical line and a-- description of the network. For connections to PDNs,-- it should name the PDN.-- ifMtu: the maximum number of octets an upper layer can-- pass to this interface as a single frame.-- ifSpeed:-- ifAdminStatus:-- ifOperStatus:
-- ifLastChange: the last time the state of the interface-- changed. A reset is considered an instantaneous change to-- the ndm state and back to abm or abme. This will be the-- last time that lapbFlowChangeReason and lapbFlowChanges-- changed.-- ifInOctets: contains the number of octets-- received from the peer LAPB including FCS.-- ifInUcastPkts: contains the number of I-frames delivered-- by this interface to a higher layer interface.-- ifInDiscards: contains the number of received-- frames discarded because of internal conditions-- (such as lack of buffering).-- ifInErrors: contains the number of Invalid frames received.-- This does not have any relationship with the number REJ,-- or RNR frames sent or received.-- ifInUnknownProtos: contains the number of frames-- that were correct but were dropped because they-- were inappropriate for the current state. This-- includes an invalid Poll bit, an unknown address,-- or other condition such as an RNR when connection-- not established. This also includes the number of-- DISC or other frames that were ignored because the-- link was not established and this interface was not
-- configured to perform link setup on that type frame.-- ifOutOctets: number of octets sent to peer including-- FCS octets.-- ifOutUcastPkts: number of I-frames received from-- a higher layer for transmission to peer.-- ifOutDiscards: number of frames to be sent that were-- dropped due to internal conditions such as buffering etc.-- ifOutErrors: number of transmissions that failed-- due to errors or were considered invalid by the receiver.-- This does not have any relationship with the number REJ,-- or RNR frames sent or received.-- ifOutQLen: number of frames waiting to be transmitted.-- This MIB does not provide any support for:-- Multilink procedure (MLP) in ISO 7776 section 6-- LLC Pbit timer-- LLC REJ timer-- LLC Busy State Timer 7.8.1.4-- ###########################################################END