CISCO-WAN-LAPD-TRUNK-MIB

All MIBs › CISCO-WAN-LAPD-TRUNK-MIB

Organization: Cisco Systems, Inc.

Last Updated: 2003-12-11

Category: Telephony and VoIP, Vendor: Cisco Devices

Description: Manages Cisco WAN LAPD (Link Access Procedure D-channel) trunk configuration for ISDN signaling.

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What Is CISCO-WAN-LAPD-TRUNK-MIB?

CISCO-WAN-LAPD-TRUNK-MIB is a Cisco-proprietary MIB for VISM (Voice Interworking Service Module) cards, covering LAPD (Link Access Procedure on the D-channel) trunking used to carry ISDN PRI signaling over a Reliable UDP (RUDP) transport for Common Channel Signaling (CCS) VoIP trunking. It exposes configuration and state objects for LAPD trunk groups and individual LAPD links, including link state, application type, and windowing/timer parameters. For monitoring purposes it is primarily about protocol/software-level link health—tracking whether a given LAPD trunk/link is up (vismLapdTrunkState) and correctly bound to its underlying RUDP connection—rather than physical hardware counters. It depends on the associated RUDP transport layer and pairs with other Cisco WAN VISM MIBs (RTP connection, tone plan, announcement) that describe the same media gateway card's VoIP trunking functions. Administrators scripting polling against this module often start by walking the CISCO-WAN-LAPD-TRUNK-MIB OID tree to locate vismLapdTrunkState and the related trunk-group objects before it is deployed on Cisco WAN switching platforms (e.g., MGX 8000 series) carrying ISDN PRI signaling for VoIP/CCS trunking applications.

IPNetwork Monitor allows you to monitor SNMP objects defined in CISCO-WAN-LAPD-TRUNK-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Cisco WAN switching platforms with VISM cards, e.g. Cisco MGX 8000 series

Monitoring Examples

An administrator would poll vismLapdTrunkGrpTable/vismLapdTrunkGrpEntry, indexed by vismLapdTrunkNum, to check vismLapdTrunkState and confirm the trunk is correctly associated with vismLapdTrunkRudpIndex. Within vismLapdTable/vismLapdEntry, vismLapdAppType, vismLapdWinSize, and vismLapdN200 would be checked to verify the LAPD link is configured with the expected windowing and retransmission parameters for reliable PRI signaling transport. A LAPD trunk state that will not transition to active, or a rowstatus (vismLapdTrunkRowStatus) stuck mid-creation, would flag a signaling trunk provisioning fault.

What Can Be Monitored

LAPD trunk operational state
LAPD trunk-to-RUDP connection association
LAPD link windowing/retry parameters (N200, window size)
trunk/link provisioning row status

Imported Objects

From BASIS-MIB

voice

OBJECT-IDENTITY

From CISCOWAN-SMI

ciscoWan

OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
OBJECT-TYPE

From SNMPv2-TC

RowStatus

OIDs

OID symbolic	OID numeric	Type	Access	Description
ciscoVismLapdDlcTable	1.3.6.1.4.1.351.150.23.3.2.4			The collection of objects which are used to represent VISM LAPD link State of different DLCs on a LAPD channel.
ciscoVismLapdGroup	1.3.6.1.4.1.351.150.23.3.2.2			The collection of objects which are used to represent VISM LAPD information.
ciscoVismLapdStatsGroup	1.3.6.1.4.1.351.150.23.3.2.3			The collection of objects which are used to represent VISM LAPD Statistics information.
ciscoWanLapdTrunkMIB	1.3.6.1.4.1.351.150.23			The MIB module is defined for establishing a Trunk to transport PRI (Primary Rate Interface) signaling information over a RUDP (Reliable UDP) connection for CCS (Common Channel Signaling) VoIP(Voice Over IP) Trunking application.
ciscoWanLapdTrunkMIBObjects	1.3.6.1.4.1.351.150.23.1
INT vismLapdAppType	1.3.6.1.4.1.351.110.5.5.12.1.1.2	INTEGER	read-create	This object indicates the type of the LAPD interface. When the user creates a LAPD entry this object need to be specified. After creation it cannot be modified. 'pri' - level of service provided by ISDN(Integrated Services Digital Network) that carries voice, data, other services with control and signaling information in D-channel. 'gr-303' - standard interfaces for integrated digital loop carrier systems.
vismLapdDlcEntry	1.3.6.1.4.1.351.110.5.5.12.3.1		not-accessible	An entry for vismLapdDlcTable.
I32 vismLapdDlcIndex	1.3.6.1.4.1.351.110.5.5.12.3.1.1	Integer32	read-only	This object identifies the corresponding LAPD index. It is the same as vismLapdIndex.
INT vismLapdDlcLinkState	1.3.6.1.4.1.351.110.5.5.12.3.1.4	INTEGER	read-only	This object indicate the linking state on a given DLC.
I32 vismLapdDlcSapi	1.3.6.1.4.1.351.110.5.5.12.3.1.2	Integer32	read-only	This is the SAPI(Service Access Point Identifier) of a specific DLC(Data Link Control).
vismLapdDlcTable	1.3.6.1.4.1.351.110.5.5.12.3		not-accessible	This table is used for maintaining the link state of different DLCs on a LAPD channel. An entry of this table will be implicitly created when a LAPD entry is added.
I32 vismLapdDlcTei	1.3.6.1.4.1.351.110.5.5.12.3.1.3	Integer32	read-only	This is the TEI(Terminal Endpoint Identifier) of a specific DLC.
vismLapdEntry	1.3.6.1.4.1.351.110.5.5.12.1.1		not-accessible	An entry for vismLapdTable.
vismLapdGrp	1.3.6.1.4.1.351.110.5.5.12
I32 vismLapdIndex	1.3.6.1.4.1.351.110.5.5.12.1.1.1	Integer32	read-only	This is an index to vismLapdTable. This is derived from the following formula: index = 31 * (DS1# - 1) + DS0# where : DS1# - The T1/E1 line number in the range 1 - 8. DS0# - The DS0 channel number ranging from 1 to 24 for T1 and 1 to 31 for E1.
I32 vismLapdN200	1.3.6.1.4.1.351.110.5.5.12.1.1.4	Integer32	read-create	The maximum number of retransmissions of a frame.
ROW vismLapdRowStatus	1.3.6.1.4.1.351.110.5.5.12.1.1.8	RowStatus	read-create	Row status allows users to create or delete a LAPD entry. 'createAndGo' - this option is use to create an entry in the table. Before a LAPD entry is created, the session manager should be set up(add a PRI backhaul session set, and session group between VISM and the call agent). Before creating a LAPD entry the entry in HDLC table will implicitly created first. If the DS0 has already been used then the request of creating a LAPD channel on the same DS0 on the same line will be rejected. After creating the LAPD entry the corresponding entry in vismLapdStatsTable will be implicitly created. 'active' - When an entry is created it becomes active. 'destroy' - Use this to delete an entry in this table. After implicitly deleting all the entries(if there is any) in vismLapdDlcEntry table for the specific D channel the entry in vismLapdEntry will be deleted, then the entry in vismLapdStatsTable will be implicitly deleted, followed by the deletion of the HDLC entry.
C32 vismLapdRxDiscModeFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.14	Counter32	read-only	This counter contains Disconnect Mode frames received on a LAPD.
C32 vismLapdRxDisconFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.10	Counter32	read-only	This counter contains Disconnect frames received on LAPD.
C32 vismLapdRxExchIdFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.18	Counter32	read-only	This counter contains Exchange Id frames received on a LAPD.
C32 vismLapdRxFrmRejectFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.16	Counter32	read-only	This counter contains Frame Reject frames received on a LAPD.
C32 vismLapdRxInfoFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.2	Counter32	read-only	This counter contains received information frames on a LAPD.
C32 vismLapdRxInvalidFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.24	Counter32	read-only	This counter contains Invalid frames received on a LAPD.
C32 vismLapdRxNotReadyFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.6	Counter32	read-only	This counter contains Receiver Not Ready frames received on LAPD.
C32 vismLapdRxReadyFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.4	Counter32	read-only	This counter contains Receiver Ready frames received on a LAPD.
C32 vismLapdRxRejectFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.22	Counter32	read-only	This counter contains Received Reject Frames on a LAPD.
C32 vismLapdRxSABMFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.8	Counter32	read-only	This counter contains Set Asynchronous Balanced Mode frames received on a LAPD.
C32 vismLapdRxUAFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.12	Counter32	read-only	This counter contains Unnumbered Acknowledge frames received on a LAPD.
C32 vismLapdRxUnumInfoFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.20	Counter32	read-only	This counter contains Unnumbered Information frames received on a LAPD.
INT vismLapdSide	1.3.6.1.4.1.351.110.5.5.12.1.1.9	INTEGER	read-create	This object specifies whether LAPD stack is on the user side or network side. This object can be set when the row is created. It cannot be modified for an existing row.
vismLapdStatsEntry	1.3.6.1.4.1.351.110.5.5.12.2.1		not-accessible	An entry in the LAPD Table.
I32 vismLapdStatsIndex	1.3.6.1.4.1.351.110.5.5.12.2.1.1	Integer32	read-only	This is the index for this table. It is the same as vismLapdIndex. An entry of this table will be implicitly created when a LAPD entry is added.
vismLapdStatsTable	1.3.6.1.4.1.351.110.5.5.12.2		not-accessible	This table contains statistics information for all LAPD (D channel Data Link) interfaces on VISM.
I32 vismLapdT200	1.3.6.1.4.1.351.110.5.5.12.1.1.5	Integer32	read-create	The maximum number of time in milliseconds to wait for acknowledgement for a transmit frame. This value should be less than vismLapdT203. For PRI, the range is 1000 ms to 1023000 ms. The default is 1000 ms. For GR-303, the range is 100 ms to 350 ms in increments of 50 ms. The default value is 150 ms.
I32 vismLapdT203	1.3.6.1.4.1.351.110.5.5.12.1.1.6	Integer32	read-create	The maximum time (in milliseconds) allowed without frames being exchanged. This value should be greater than vismLapdT200. For PRI, the range is 1000 to 1023000 and the default is 10000 ms. For GR-303, the range is 10000 to 300000 ms in increments of 10000 ms. The default is 30000 ms.
vismLapdTable	1.3.6.1.4.1.351.110.5.5.12.1		not-accessible	This table is used for maintaining the configuration of the LAPD channel on VISM.
vismLapdTrunkGroup	1.3.6.1.4.1.351.150.23.3.2.1			This group contains objects related to configuration of LAPD Trunk connections over RUDP.
vismLapdTrunkGrp	1.3.6.1.4.1.351.150.23.1.1
vismLapdTrunkGrpEntry	1.3.6.1.4.1.351.150.23.1.1.1.1		not-accessible	An entry in the vismLapdTrunkGrpTable.
vismLapdTrunkGrpTable	1.3.6.1.4.1.351.150.23.1.1.1		not-accessible	This table defines attributes used to set up a Trunked LAPD (Link Access Procedure on the D-channel) connection over RUDP between 2 VISM's to transport PRI D channel information. Such a Trunked connection over RUDP can only be created if the D-channel has already not been configured for PRI Backhaul. The object vismLapdTrunkType in vismLapdTable indicate PRI Backhaul or Trunking is configured, also an entry will be created for each D channel. PRI Backhaul and PRI Trunking can co-exist on the same card but not on the same line, a line (DS1) is associated with a LAPD RUDP through vismLapdTrunkRudpIndex.
vismLapdTrunkMIBCompliance	1.3.6.1.4.1.351.150.23.3.1.1			The complaince statement for LAPD Trunk group which implements vismLapdTrunkGrp MIB.
vismLapdTrunkMIBCompliances	1.3.6.1.4.1.351.150.23.3.1
vismLapdTrunkMIBConformance	1.3.6.1.4.1.351.150.23.3
vismLapdTrunkMIBGroups	1.3.6.1.4.1.351.150.23.3.2
vismLapdTrunkNotificationPrefix	1.3.6.1.4.1.351.150.23.2
vismLapdTrunkNotifications	1.3.6.1.4.1.351.150.23.2.0
I32 vismLapdTrunkNum	1.3.6.1.4.1.351.150.23.1.1.1.1.1	Integer32	not-accessible	This is the index of vismLapdTrunkGrpTable.
ROW vismLapdTrunkRowStatus	1.3.6.1.4.1.351.150.23.1.1.1.1.4	RowStatus	read-create	This variable allows the user to add or delete the entry for this table. 'createAndGo': Use this to add a LAPD Trunk connection in this table. The vismLapdTrunkRudpIndex for this corresponding entry has to be specified also. 'active': This value is returned, once the row is created. 'destroy': Use this to delete a LAPD Trunk connection from this table.
I32 vismLapdTrunkRudpIndex	1.3.6.1.4.1.351.150.23.1.1.1.1.3	Integer32	read-create	All LAPD Trunk connections are over RUDP. Each RUDP connection is characterized by a set of negotiable and non-negotiable parameters. These parameters are in vismRudpSessionCnfEntry(defined in CISCO-VISM-SESSION-MIB MIB) table. This object is an index into that table. Before creating an entry in this table the corresponding RUDP session entry must be created in the vismRudpSessionCnfEntry table with the vismRudpSessionType(defined in the same MIB) as LAPD Trunking. The RUDP session cannot be deleted if the corresponding LAPD Trunk still exist. The LAPD Trunk needs to be deleted before deleting RUDP session as specified in CISCO-VISM-SESSION-MIB.
INT vismLapdTrunkState	1.3.6.1.4.1.351.150.23.1.1.1.1.2	INTEGER	read-only	'oos' - Out of service state. The LAPD Trunk state is independent of the RUDP session state in the sense that the LAPD state could be 'oos' while the RUDP session state is 'is' and vice versa. 'is' - In service state. 'unknown' - This is the state other than the above states. If the communication is lost between the 2 VISM's, the state of this connection becomes 'oos'.
INT vismLapdTrunkType	1.3.6.1.4.1.351.110.5.5.12.1.1.10	INTEGER	read-only	This object indicates if the line is configured for Trunking or PRI Backhaul. This object is set to the appropriate type when the vismRudpSessionType (defined in CISCO-VISM-SESSION-MIB MIB) parameter in the vismRudpSessionCnfEntry(specify in the same MIB) table is set. The motivation to have similar such objects at two places is for convenience.
C32 vismLapdTxDiscModeFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.15	Counter32	read-only	This counter contains Disconnect Mode frames transmitted on a LAPD.
C32 vismLapdTxDisconFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.11	Counter32	read-only	This counter contains Disconnect frames transmitted on LAPD.
C32 vismLapdTxExchIdFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.19	Counter32	read-only	This counter contains Exchange Id frames transmitted on a LAPD.
C32 vismLapdTxFrmRejectFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.17	Counter32	read-only	This counter contains Frame Reject frames transmitted on a LAPD.
C32 vismLapdTxInfoFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.3	Counter32	read-only	This counter contains information frames transmitted on a LAPD.
C32 vismLapdTxNotReadyFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.7	Counter32	read-only	This counter contains Receiver Not Ready frames transmitted on a LAPD.
C32 vismLapdTxReadyFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.5	Counter32	read-only	This counter contains Receiver Ready frames transmitted on LAPD.
C32 vismLapdTxRejectFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.23	Counter32	read-only	This counter contains Reject frames transmitted on LAPD.
C32 vismLapdTxSABMFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.9	Counter32	read-only	This counter contains Set Asynchronous Balanced Mode frames transmitted on LAPD.
C32 vismLapdTxUAFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.13	Counter32	read-only	This counter contains Unnumbered Acknowledge frames transmitted on a LAPD.
C32 vismLapdTxUnumInfoFrames	1.3.6.1.4.1.351.110.5.5.12.2.1.21	Counter32	read-only	This counter contains Unnumbered Information frames transmitted on a LAPD.
INT vismLapdType	1.3.6.1.4.1.351.110.5.5.12.1.1.7	INTEGER	read-create	This object specifies what type of interface the LAPD stack will be used with. ccitt(1) : CCITT att5EssPRA(3) : AT&T 5ESS PRA att4Ess(4) : AT&T 4ESS ntDMS100PRA(6) : NT dms100 PRA vn2or3(7) : VN 2 or VN 3 insNet(8) : INS Net tr6MPC(9) : tr6 MPC tr6PBX(10) : tr6 PBX ausp(12) : Austel Primary ni1(13) : National ISDN-1 etsi(14) : ETSI bc303TMC(15) : Bellcorp tr303 tmc bc303CSC(16) : Bellcorp tr303 csc ntDMS250(17) : NT dms250 bellcore(18) : Bellcore ni2(19) : National ISDN-2
I32 vismLapdWinSize	1.3.6.1.4.1.351.110.5.5.12.1.1.3	Integer32	read-create	The window size - maximum number of sequentially numbered I-frames that may be outstanding.

RFC description

Cisco WAN MIB for managing LAPD (Link Access Procedure on the D-channel) trunks over RUDP connections transporting PRI signaling for CCS VoIP trunking applications.

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Download CISCO-WAN-LAPD-TRUNK-MIB

What Is CISCO-WAN-LAPD-TRUNK-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description