MPLS-LC-ATM-MIB-DRAFT-01

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Organization: Multiprotocol Label Switching (MPLS) Working Group

Last Updated: 2004-01-30

Category: MPLS Traffic Engineering

Description: Defines IETF draft SNMP objects for managing MPLS label-controlled ATM interfaces and cross-connect parameters.

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What Is MPLS-LC-ATM-MIB-DRAFT-01?

MPLS-LC-ATM-MIB-DRAFT-01 is a vendor-neutral IETF draft standards MIB, based on RFC 3035, for managing MPLS Label-Controlled ATM interfaces, within the WAN/MPLS core-network management area. It exposes configuration data for LC-ATM interfaces, including per-interface control VPI/VCI ranges, unlabeled-traffic VPI/VCI values, VC-merge capability, and row-status control for provisioning entries, plus the standard conformance apparatus (groups/compliances) and a notifications subtree. Its monitoring relevance is mainly configuration verification for MPLS-over-ATM label switching rather than hardware health: an administrator confirms the control and data VPI/VCI ranges assigned to an interface match the intended MPLS label space, and checks whether VC merging is enabled to understand cell-interleaving behavior. It explicitly depends on base MPLS standard MIBs (e.g., MPLS-LSR-MIB) since it extends generic MPLS constructs to ATM's VPI/VCI addressing, and on standard ATM-MIB conventions for the underlying ATM interface. Typical deployment is service-provider MPLS core/edge routers using ATM transport, now largely legacy given MPLS's shift to Ethernet/IP-based label switching. Engineers can download the MPLS-LC-ATM-MIB-DRAFT-01 file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in MPLS-LC-ATM-MIB-DRAFT-01. 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

vendor-neutral, standards-based MIB, not tied to a specific manufacturer
MPLS-over-ATM edge/core routers

Monitoring Examples

An administrator provisioning an LC-ATM interface would set and later poll mplsLcAtmCtrlVpi/mplsLcAtmCtrlVci in mplsLcAtmIfConfTable/mplsLcAtmIfConfEntry to confirm the control VC used for MPLS label distribution matches configuration, and mplsLcAtmUnlabTrafVpi/mplsLcAtmUnlabTrafVci to verify where non-labeled traffic is carried. Checking mplsLcAtmVcMerge shows whether VC merging is enabled, which affects how multiple label-switched paths share underlying ATM VCs. mplsLcAtmIfConfRowStatus reveals whether a given interface entry is active, not-in-service, or still being created, useful for spotting a stalled provisioning operation; mplsLcAtmNotifications/mplsLcAtmConformance/mplsLcAtmCompliances/mplsLcAtmGroups are conformance/notification-registration constructs rather than pollable runtime data.

What Can Be Monitored

control VPI/VCI values per LC-ATM interface
unlabeled-traffic VPI/VCI values
VC-merge enable state
interface row/provisioning status

Imported Objects

From ATM-TC-MIB

AtmVpIdentifier

From MPLS-LSR-STD-MIB

mplsInterfaceIndex

OBJECT-TYPE

From MPLS-TC-STD-MIB

MplsAtmVcIdentifier
mplsStdMIB	OBJECT-IDENTITY

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
enterprises

From SNMPv2-TC

RowStatus
StorageType
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
mplsLcAtmMIB	1.3.6.1.4.1.99999.40			This MIB contains managed object definitions for MPLS Label Controlled ATM interfaces as defined in RFC3035.
mplsLcAtmNotifications	1.3.6.1.4.1.99999.40.0
mplsLcAtmObjects	1.3.6.1.4.1.99999.40.1
mplsLcAtmIfConfTable	1.3.6.1.4.1.99999.40.1.1		not-accessible	This table specifies per-interface MPLS LC-ATM capability and associated information. In particular, this table extends the MPLS-LSR MIB's mplsInterfaceConfTable.
mplsLcAtmIfConfEntry	1.3.6.1.4.1.99999.40.1.1.1		not-accessible	An entry in this table is created by an LSR for every interface capable of supporting MPLS LC-ATM. Each entry in this table will exist only if a corresponding entry in ifTable and mplsInterfaceConfTable exist. If the associated entries in ifTable and mplsInterfaceConfTable are deleted, the corresponding entry in this table must also be deleted shortly thereafter.
OID mplsLcAtmCtrlVpi	1.3.6.1.4.1.99999.40.1.1.1.1	AtmVpIdentifier	read-create	This is the VPI value over which this LSR is willing to accept control traffic on this interface.
OID mplsLcAtmCtrlVci	1.3.6.1.4.1.99999.40.1.1.1.2	MplsAtmVcIdentifier	read-create	This is the VCI value over which this LSR is willing to accept control traffic on this interface.
OID mplsLcAtmUnlabTrafVpi	1.3.6.1.4.1.99999.40.1.1.1.3	AtmVpIdentifier	read-create	This is the max VPI value over which this LSR is willing to accept unlabeled traffic on this interface.
OID mplsLcAtmUnlabTrafVci	1.3.6.1.4.1.99999.40.1.1.1.4	MplsAtmVcIdentifier	read-create	This is the VCI value over which this LSR is willing to accept unlabled traffic on this interface.
T/F mplsLcAtmVcMerge	1.3.6.1.4.1.99999.40.1.1.1.5	TruthValue	read-create	If set to true(0), indicates that this interface is capabile of ATM VC merge, otherwise it MUST be set to false(1).
ROW mplsLcAtmIfConfRowStatus	1.3.6.1.4.1.99999.40.1.1.1.6	RowStatus	read-create	This is object is used to create and delete entries in this table. When configuring entries in this table, the corresponding corresponding ifEntry and mplsInterfaceConfEntry MUST exist before hand. If an entry is attempted to be created by a manager for a corresponding mplsInterfaceConfEntry that does not support LC-ATM, the agent MUST return an inconsistentValue error. If this table is implemented read-only, then the agent must set this object to active(1) when this row is made active. If this table is implemented writable, then an agent MUST not allow modification to its objects once this value is set to active(1).
STO mplsLcAtmIfConfStoreType	1.3.6.1.4.1.99999.40.1.1.1.7	StorageType	read-create	This SNMP storage type for this entry. All objects are writable for permanent objects.
mplsLcAtmConformance	1.3.6.1.4.1.99999.40.2
mplsLcAtmCompliances	1.3.6.1.4.1.99999.40.2.1
mplsLcAtmModuleCompliance	1.3.6.1.4.1.99999.40.2.1.1			Compliance statement for agents that support MPLS LC-ATM Interfaces.
mplsLcAtmGroups	1.3.6.1.4.1.99999.40.2.2
mplsLcAtmIfGroup	1.3.6.1.4.1.99999.40.2.2.1			Collection of objects needed for MPLS LC-ATM interface configuration.

RFC description

MPLS Label Controlled ATM interface configuration and management for label switched paths.

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Download MPLS-LC-ATM-MIB-DRAFT-01

What Is MPLS-LC-ATM-MIB-DRAFT-01?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description