AGGREGATE-MIB

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Organization: Cyber Solutions Inc. NetMan Working Group

Last Updated: 2006-04-27

Category: MPLS and Traffic Engineering

Description: Allows a network management agent to aggregate values of user-specified managed object instances and service queries on the aggregated results, reducing SNMP bandwidth.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring AGGREGATE-MIB with a free 30-day trial of IPNetwork Monitor.

What Is AGGREGATE-MIB?

AGGREGATE-MIB is an IETF standards-track MIB (RFC 4498) that lets a network management agent aggregate the values of several user-specified managed object instances into a single, optionally compressed, aggregated object, reducing the number of SNMP requests and the bandwidth needed to poll many related MOs. It defines aggrCtlTable (aggrCtlMOIndex, aggrCtlMODescr, aggrCtlCompressionAlgorithm choosing between none and deflate compression, aggrCtlEntryStatus RowStatus) to configure each aggregated MO, aggrMOTable (aggrMOInstance, an OBJECT IDENTIFIER pointing at the actual instance to sample, plus aggrMODescr) to list the constituent MOs in each group, and aggrDataTable (aggrDataRecord, aggrDataRecordCompressed, aggrDataErrorRecord) holding the resulting aggregated snapshot and any per-instance fetch errors. This is a control/data-aggregation MIB rather than a hardware-monitoring one, so it is useful for reducing polling overhead against high-scale device populations and for detecting per-instance fetch failures via aggrDataErrorRecord. It has no vendor dependency beyond standard SNMPv2 SMI/TC/CONF modules and RMON-MIB's OwnerString, and administrators bulk-loading reference material can find the AGGREGATE-MIB RFC alongside RFC 4498 itself.

IPNetwork Monitor allows you to monitor SNMP objects defined in AGGREGATE-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

vendor-neutral, standards-based MIB (RFC 4498), not tied to a specific manufacturer

Monitoring Examples

An operator configures an aggrCtlEntry pointing at a set of interface counters via aggrMOTable, then polls the single aggrDataRecord instance in aggrDataTable instead of each counter individually; a non-empty aggrDataErrorRecord for that aggregated MO would indicate one or more of the constituent object instances failed to respond, flagging a stale or misconfigured entry in aggrMOTable.

What Can Be Monitored

aggregation control table entries (compression algorithm, storage type, row status)
constituent MO instance list per aggregated group
aggregated data snapshot record
compressed aggregated data record
per-instance error status within an aggregated record

Imported Objects

From RMON-MIB

OwnerString

From SNMP-FRAMEWORK-MIB

SnmpAdminString

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-SMI

MODULE-IDENTITY
OBJECT-TYPE
Opaque
Unsigned32
experimental

From SNMPv2-TC

RowStatus
StorageType
TEXTUAL-CONVENTION

OIDs

OID symbolic	OID numeric	Type	Access	Description
aggrMIB	1.3.6.1.3.123			The MIB for servicing aggregate objects. Copyright (C) The Internet Society (2006). This version of this MIB module is part of RFC 4498; see the RFC itself for full legal notices.
aggrCtlTable	1.3.6.1.3.123.1		not-accessible	A table that controls the aggregation of the MOs.
aggrCtlEntry	1.3.6.1.3.123.1.1		not-accessible	A row of the control table that defines one aggregated MO. Entries in this table are required to survive a reboot of the managed entity depending on the value of the corresponding aggrCtlEntryStorageType instance.
STR aggrCtlEntryID	1.3.6.1.3.123.1.1.1	SnmpAdminString	not-accessible	A locally unique, administratively assigned name for this aggregated MO. It is used as an index to uniquely identify this row in the table.
U32 aggrCtlMOIndex	1.3.6.1.3.123.1.1.2	Unsigned32	read-create	A pointer to a group of MOs identified by aggrMOEntryID in the aggrMOTable. This is the group of MOs that will be aggregated.
STR aggrCtlMODescr	1.3.6.1.3.123.1.1.3	SnmpAdminString	read-create	A textual description of the object that is being aggregated.
INT aggrCtlCompressionAlgorithm	1.3.6.1.3.123.1.1.4	INTEGER	read-create	The compression algorithm that will be used by the agent to compress the value of the aggregated object. The deflate algorithm and corresponding data format specification is described in RFC 1951. It is compatible with the widely used gzip utility.
STR aggrCtlEntryOwner	1.3.6.1.3.123.1.1.5	OwnerString	read-create	The entity that created this entry.
STO aggrCtlEntryStorageType	1.3.6.1.3.123.1.1.6	StorageType	read-create	This object defines whether the parameters defined in this row are kept in volatile storage and lost upon reboot or backed up by non-volatile (permanent) storage. Conceptual rows having the value 'permanent' need not allow write-access to any columnar objects in the row.
ROW aggrCtlEntryStatus	1.3.6.1.3.123.1.1.7	RowStatus	read-create	The row status variable, used according to row installation and removal conventions. Objects in a row can be modified only when the value of this object in the corresponding conceptual row is not 'active'. Thus, to modify one or more of the objects in this conceptual row, a. change the row status to 'notInService', b. change the values of the row, and c. change the row status to 'active'. The aggrCtlEntryStatus may be changed to 'active' if all the MOs in the conceptual row have been assigned valid values.
aggrMOTable	1.3.6.1.3.123.2		not-accessible	The table of primary(simple) MOs that will be aggregated. Each row in this table represents a MO that will be aggregated. The aggrMOEntryID index is used to identify the group of MOs that will be aggregated. The aggrMOIndex instance in the corresponding row of the aggrCtlTable will have a value equal to the value of aggrMOEntryID. The aggrMOEntryMOID index is used to identify an MO in the group.
aggrMOEntry	1.3.6.1.3.123.2.1		not-accessible	A row of the table that specifies one MO. Entries in this table are required to survive a reboot of the managed entity depending on the value of the corresponding aggrMOEntryStorageType instance.
U32 aggrMOEntryID	1.3.6.1.3.123.2.1.1	Unsigned32	not-accessible	An index uniquely identifying a group of MOs that will be aggregated.
U32 aggrMOEntryMOID	1.3.6.1.3.123.2.1.2	Unsigned32	not-accessible	An index to uniquely identify an MO instance in the group of MO instances that will be aggregated.
OID aggrMOInstance	1.3.6.1.3.123.2.1.3	OBJECT IDENTIFIER	read-create	The OID of the MO instance, the value of which will be sampled by the agent.
STR aggrMODescr	1.3.6.1.3.123.2.1.4	SnmpAdminString	read-create	A textual description of the object that will be aggregated.
STO aggrMOEntryStorageType	1.3.6.1.3.123.2.1.5	StorageType	read-create	This object defines whether the parameters defined in this row are kept in volatile storage and lost upon reboot or backed up by non-volatile (permanent) storage. Conceptual rows having the value 'permanent' need not allow write-access to any columnar objects in the row.
ROW aggrMOEntryStatus	1.3.6.1.3.123.2.1.6	RowStatus	read-create	The row status variable, used according to row installation and removal conventions. Objects in a row can be modified only when the value of this object in the corresponding conceptual row is not 'active'. Thus, to modify one or more of the objects in this conceptual row, a. change the row status to 'notInService', b. change the values of the row, and c. change the row status to 'active'. The aggrMOEntryStatus may be changed to 'active' iff all the MOs in the conceptual row have been assigned valid values.
aggrDataTable	1.3.6.1.3.123.3		not-accessible	Each row of this table contains information about an aggregateMO indexed by aggrCtlEntryID.
aggrDataEntry	1.3.6.1.3.123.3.1		not-accessible	Entry containing information pertaining to an aggregate MO.
AGG aggrDataRecord	1.3.6.1.3.123.3.1.1	AggrMOValue	read-only	The snapshot value of the aggregated MO. Note that the access privileges to this object will be governed by the access privileges of the component objects. Thus, an entity attempting to access an instance of this MO MUST have access rights to all the component instance objects and this MO instance.
AGG aggrDataRecordCompressed	1.3.6.1.3.123.3.1.2	AggrMOCompressedValue	read-only	The compressed value of the aggregated MO. The compression algorithm will depend on the aggrCtlCompressionAlgorithm given in the corresponding aggrCtlEntry. If the value of the corresponding aggrCtlCompressionAlgorithm is (1) 'none', then the value of all instances of this object will be a string of zero length. Note that the access privileges to this object will be governed by the access privileges of the component objects. Thus, an entity attempting to access an instance of this MO MUST have access rights to all the component instance objects and this MO instance.
AGG aggrDataErrorRecord	1.3.6.1.3.123.3.1.3	AggrMOErrorStatus	read-only	The error status corresponding to the MO instances aggregated in aggrDataRecord (and aggrDataRecordCompressed).
aggrConformance	1.3.6.1.3.123.4
aggrGroups	1.3.6.1.3.123.4.1
aggrMibBasicGroup	1.3.6.1.3.123.4.1.1			A collection of objects for aggregation of MOs.
aggrCompliances	1.3.6.1.3.123.4.2
aggrMibCompliance	1.3.6.1.3.123.4.2.1			The compliance statement for SNMP entities that implement the AGGREGATE-MIB.

RFC description

Provides mechanisms for aggregating multiple MIB object instances into composite values with error status tracking.

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Download AGGREGATE-MIB

What Is AGGREGATE-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description