SNMPv2-M2M-MIB

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Organization: IETF SNMPv2 Working Group

Last Updated: 1993-04-01

Category: SNMP Framework

Description: Defines managed objects for manager-to-manager communication, enabling coordination and distribution of network management functions across multiple management stations.

IPNetwork Monitor uses several OIDs from this MIB in network discovery and polling the applicable devices. Start monitoring SNMPv2-M2M-MIB with a free 30-day trial of IPNetwork Monitor.

What Is SNMPv2-M2M-MIB?

SNMPv2-M2M-MIB (the Manager-to-Manager MIB, part of early SNMPv2 framework proposals) defines objects that let one management station configure alarm-style monitoring in coordination with another manager, enabling distribution of network management functions across multiple management stations. It exposes an alarm table modeled closely on the RMON alarm group — sampled variables, sampling intervals, sample type, rising/falling thresholds, and startup behavior. It is used to build generic threshold-based alerting on arbitrary MIB variables coordinated between cooperating managers, effectively a performance/fault monitoring mechanism, rather than exposing hardware sensors directly. It closely parallels and depends conceptually on the RMON alarmTable/eventTable model (RFC 2819) for its alarm semantics. It would be deployed in distributed network management architectures where multiple manager stations share alarm-configuration responsibilities across a large network. Engineers implementing or auditing this functionality typically reference the SNMPv2-M2M-MIB RFC/standard documentation for the authoritative specification.

IPNetwork Monitor allows you to monitor SNMP objects defined in SNMPv2-M2M-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, not tied to a specific manufacturer
SNMP-managed network devices and management stations

Monitoring Examples

An admin would configure snmpAlarmTable/snmpAlarmEntry entries, setting snmpAlarmVariable to the OID being watched, snmpAlarmInterval and snmpAlarmSampleType to control sampling, and snmpAlarmRisingThreshold/snmpAlarmFallingThreshold to define alert boundaries; snmpAlarmValue reports the last sampled value. If snmpAlarmValue crosses snmpAlarmRisingThreshold, the associated snmpAlarmRisingEventIndex triggers an event, letting an admin build generic threshold-crossing alerts (e.g., on interface errors or utilization) without vendor-specific tooling.

What Can Be Monitored

sampled variable value
alarm sampling interval
rising/falling threshold crossing
startup alarm behavior
alarm table entry index

Imported Objects

From SNMPv2-CONF

MODULE-COMPLIANCE
OBJECT-GROUP

From SNMPv2-PARTY-MIB

contextIdentity

OBJECT-TYPE

From SNMPv2-SMI

Counter32
Integer32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
snmpModules

From SNMPv2-TC

DisplayString
InstancePointer
RowStatus
TimeStamp

How to Use in IPNetwork Monitor

Example using snmpEventEvents OID:

Select a device implementing SNMPv2-M2M-MIB as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type snmpEventEvents into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of events caused by event generators associated with this snmpEvent entry. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
snmpM2M	1.3.6.1.6.3.2			The Manager-to-Manager MIB module.
snmpM2MObjects	1.3.6.1.6.3.2.1
snmpAlarm	1.3.6.1.6.3.2.1.1
INT snmpAlarmNextIndex	1.3.6.1.6.3.2.1.1.1	INTEGER	read-only	The index number of the next appropriate unassigned entry in the snmpAlarmTable. The value 0 indicates that no unassigned entries are available. A management station should create new entries in the snmpAlarmTable using this algorithm: first, issue a management protocol retrieval operation to determine the value of snmpAlarmNextIndex; and, second, issue a management protocol set operation to create an instance of the snmpAlarmStatus object setting its value to `createAndGo' or `createAndWait' (as specified in the description of the RowStatus textual convention).
snmpAlarmTable	1.3.6.1.6.3.2.1.1.2		not-accessible	A list of snmpAlarm entries.
snmpAlarmEntry	1.3.6.1.6.3.2.1.1.2.1		not-accessible	A list of parameters that set up a periodic sampling query to check for alarm conditions. The contextIdentity included in the INDEX clause is the context to which the sampling queries are directed.
INT snmpAlarmIndex	1.3.6.1.6.3.2.1.1.2.1.1	INTEGER	not-accessible	An index that uniquely identifies an entry in the snmpAlarm table for a particular sampling context. Each such entry defines a diagnostic sample at a particular interval for a variable in the particular context's object resources.
NUM snmpAlarmVariable	1.3.6.1.6.3.2.1.1.2.1.2	InstancePointer	read-create	The object identifier of the particular variable to be sampled. Only variables that resolve to an ASN.1 primitive type of INTEGER (Integer32, Counter32, Gauge32, TimeTicks, Counter64, or UInteger32) may be sampled. If it is detected by an error response of authorizationError, noSuchObject, or noSuchInstance that the variable name of an established snmpAlarmEntry is no longer available in the sampling context, a single snmpObjectUnavailableAlarm event is generated and the status of this snmpAlarmEntry is set to `destroy'. Likewise, if the syntax of the variable retrieved by the query is not Integer32, Counter32, Gauge32, TimeTicks, Counter64, or UInteger32, the same actions will be taken. If the SNMPv2 entity acting in a dual role detects that the sampled value can not be obtained due to lack of response to management queries, it should either: 1) Set the status of this snmpAlarmEntry to `destroy', if it is determined that further communication is not possible; or, 2) Delete the associated snmpAlarmValue instance (but not the entire conceptual row), and continue to attempt to sample the variable and recreate the associated snmpAlarmValue instance should communication be reestablished. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
I32 snmpAlarmInterval	1.3.6.1.6.3.2.1.1.2.1.3	Integer32	read-create	The interval in seconds over which the data is sampled and compared with the rising and falling thresholds. When setting this object and the sampling type is `deltaValue', care should be taken to ensure that the change during this interval of the variable being sampled will not exceed the (-2^31...2^31-1) range of the snmpAlarmValue. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
INT snmpAlarmSampleType	1.3.6.1.6.3.2.1.1.2.1.4	INTEGER	read-create	The method of sampling the selected variable and calculating the value to be compared against the thresholds. If the value of this object is `absoluteValue', the value of the selected variable at the end of the sampling interval will be compared directly with both the snmpAlarmRisingThreshold and the snmpAlarmFallingThreshold values. If the value of this object is `deltaValue', the value of the selected variable at the end of the sampling interval will be subtracted from its value at the end of the previous sampling interval, and the difference compared with both the snmpAlarmRisingThreshold and the snmpAlarmFallingThreshold values. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
I32 snmpAlarmValue	1.3.6.1.6.3.2.1.1.2.1.5	Integer32	read-only	The value of the statistic during the last sampling period. The value during the current sampling period is not made available until the period is completed. If the value of the statistic does not fit in the signed 32 bit representation of this object, it should be truncated in an implementation specific manner. Note that if the associated snmpAlarmSampleType is set to `deltaValue', the value of this object is the difference in the sampled variable since the last sample. This object will be created by the SNMPv2 entity acting in a dual role when this entry is set to `active', and the first sampling period has completed. It may be created and deleted at other times by the SNMPv2 entity acting in a dual role when the sampled value can not be obtained, as specified in the snmpAlarmVariable object.
INT snmpAlarmStartupAlarm	1.3.6.1.6.3.2.1.1.2.1.6	INTEGER	read-create	The alarm that may be sent when this entry is first set to `active'. If the first sample after this entry becomes active is greater than or equal to the risingThreshold and snmpAlarmStartupAlarm is equal to `risingAlarm' or `risingOrFallingAlarm', then a single rising alarm will be generated. If the first sample after this entry becomes active is less than or equal to the fallingThreshold and snmpAlarmStartupAlarm is equal to `fallingAlarm' or `risingOrFallingAlarm', then a single falling alarm will be generated. Note that a snmpObjectUnavailableAlarm is sent upon startup whenever it is applicable, independent of the setting of snmpAlarmStartupAlarm. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
I32 snmpAlarmRisingThreshold	1.3.6.1.6.3.2.1.1.2.1.7	Integer32	read-create	A threshold for the sampled statistic. When the current sampled value is greater than or equal to this threshold, and the value at the last sampling interval was less than this threshold, a single event will be generated. A single event will also be generated if the first sample after this entry becomes active is greater than or equal to this threshold and the associated snmpAlarmStartupAlarm is equal to `risingAlarm' or `risingOrFallingAlarm'. After a rising event is generated, another such event will not be generated until the sampled value falls below this threshold and reaches the snmpAlarmFallingThreshold. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
I32 snmpAlarmFallingThreshold	1.3.6.1.6.3.2.1.1.2.1.8	Integer32	read-create	A threshold for the sampled statistic. When the current sampled value is less than or equal to this threshold, and the value at the last sampling interval was greater than this threshold, a single event will be generated. A single event will also be generated if the first sample after this entry becomes active is less than or equal to this threshold and the associated snmpAlarmStartupAlarm is equal to `fallingAlarm' or `risingOrFallingAlarm'. After a falling event is generated, another such event will not be generated until the sampled value rises above this threshold and reaches the snmpAlarmRisingThreshold. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
INT snmpAlarmRisingEventIndex	1.3.6.1.6.3.2.1.1.2.1.9	INTEGER	read-create	The index of the snmpEventEntry that is used when a rising threshold is crossed. The snmpEventEntry identified by a particular value of this index is the same as identified by the same value of the snmpEventIndex object. If there is no corresponding entry in the snmpEventTable, then no association exists. In particular, if this value is zero, no associated event will be generated, as zero is not a valid snmpEventIndex. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
INT snmpAlarmFallingEventIndex	1.3.6.1.6.3.2.1.1.2.1.10	INTEGER	read-create	The index of the snmpEventEntry that is used when a falling threshold is crossed. The snmpEventEntry identified by a particular value of this index is the same as identified by the same value of the snmpEventIndex object. If there is no corresponding entry in the snmpEventTable, then no association exists. In particular, if this value is zero, no associated event will be generated, as zero is not a valid snmpEventIndex. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
INT snmpAlarmUnavailableEventIndex	1.3.6.1.6.3.2.1.1.2.1.11	INTEGER	read-create	The index of the snmpEventEntry that is used when a variable becomes unavailable. The snmpEventEntry identified by a particular value of this index is the same as identified by the same value of the snmpEventIndex object. If there is no corresponding entry in the snmpEventTable, then no association exists. In particular, if this value is zero, no associated event will be generated, as zero is not a valid snmpEventIndex. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt.
ROW snmpAlarmStatus	1.3.6.1.6.3.2.1.1.2.1.12	RowStatus	read-create	The status of this snmpAlarm entry. This object may not be set to `active' unless the following columnar objects exist in this row: snmpAlarmVariable, snmpAlarmInterval, snmpAlarmSampleType, snmpAlarmStartupAlarm, snmpAlarmRisingThreshold, snmpAlarmFallingThreshold, snmpAlarmRisingEventIndex, snmpAlarmFallingEventIndex, and snmpAlarmUnavailableEventIndex.
snmpAlarmNotifications	1.3.6.1.6.3.2.1.1.3
NTF snmpRisingAlarm	1.3.6.1.6.3.2.1.1.3.1			An event that is generated when an alarm entry crosses its rising threshold. The instances of those objects contained within the varbind list are those of the alarm entry which generated this event.
NTF snmpFallingAlarm	1.3.6.1.6.3.2.1.1.3.2			An event that is generated when an alarm entry crosses its falling threshold. The instances of those objects contained within the varbind list are those of the alarm entry which generated this event.
NTF snmpObjectUnavailableAlarm	1.3.6.1.6.3.2.1.1.3.3			An event that is generated when a variable monitored by an alarm entry becomes unavailable. The instance of snmpAlarmVariable contained within the varbind list is the one associated with the alarm entry which generated this event.
snmpEvent	1.3.6.1.6.3.2.1.2
INT snmpEventNextIndex	1.3.6.1.6.3.2.1.2.1	INTEGER	read-only	The index number of the next appropriate unassigned entry in the snmpEventTable. The value 0 indicates that no unassigned entries are available. A management station should create new entries in the snmpEventTable using this algorithm: first, issue a management protocol retrieval operation to determine the value of snmpEventNextIndex; and, second, issue a management protocol set operation to create an instance of the snmpEventStatus object setting its value to `createAndWait' or 'createAndGo'.
snmpEventTable	1.3.6.1.6.3.2.1.2.2		not-accessible	A list of events.
snmpEventEntry	1.3.6.1.6.3.2.1.2.2.1		not-accessible	A set of parameters that describe an event that is generated when certain conditions are met.
INT snmpEventIndex	1.3.6.1.6.3.2.1.2.2.1.1	INTEGER	not-accessible	An index that uniquely identifies an entry in the snmpEvent table. Each such entry defines an event generated when the appropriate conditions occur.
OID snmpEventID	1.3.6.1.6.3.2.1.2.2.1.2	OBJECT IDENTIFIER	read-create	The authoritative identification of the event type generated by this entry. This variable occurs as the second varbind of an InformRequest- PDU. If this OBJECT IDENTIFIER maps to a NOTIFICATION-TYPE the sender will place the objects listed in the NOTIFICATION-TYPE in the varbind list.
STR snmpEventDescription	1.3.6.1.6.3.2.1.2.2.1.3	DisplayString	read-create	A comment describing this snmpEvent entry.
C32 snmpEventEventsEx	1.3.6.1.6.3.2.1.2.2.1.4	Counter32	read-only	The number of events caused by event generators associated with this snmpEvent entry.
TIM snmpEventLastTimeSent	1.3.6.1.6.3.2.1.2.2.1.5	TimeStamp	read-only	The value of sysUpTime at the time this snmpEvent entry last generated an event. If this entry has not generated any events, this value will be zero.
ROW snmpEventStatus	1.3.6.1.6.3.2.1.2.2.1.6	RowStatus	read-create	The status of this snmpEvent entry. This object may not be set to `active' unless the following columnar objects exist in this row: snmpEventID, snmpEventDescription, snmpEventEvents, and snmpEventLastTimeSent. Setting an instance of this object to the value 'destroy' has the effect of invalidating any/all entries in the snmpEventTable, and the snmpEventNotifyTable which reference the corresponding snmpEventEntry.
I32 snmpEventNotifyMinInterval	1.3.6.1.6.3.2.1.2.3	Integer32	read-only	The minimum interval that the SNMPv2 entity acting in a dual role will wait before retransmitting an InformRequest-PDU. This object specifies the minimal value supported by the SNMPv2 entity acting in a dual role, based on resource or implementation constraints. For a particular entry in the snmpEventNotifyTable, if the associated snmpEventNotifyIntervalRequested variable is greater than this object, the snmpEventNotifyIntervalRequested value shall be used as the minimum interval for retransmissions of InformRequest-PDUs sent on behalf of that entry.
I32 snmpEventNotifyMaxRetransmissions	1.3.6.1.6.3.2.1.2.4	Integer32	read-only	The maximum number of time that the SNMPv2 entity acting in a dual role will retransmit an InformRequest-PDU. This object specifies the maximal value supported by the SNMPv2 entity acting in a dual role, based on resource or implementation constraints. For a particular entry in the snmpEventNotifyTable, if the associated snmpEventNotifyRetransmissionsRequested variable is less than this object, the snmpEventNotifyRetransmissionsRequested value shall be used as the retransmission count for InformRequest-PDUs sent on behalf of that entry.
snmpEventNotifyTable	1.3.6.1.6.3.2.1.2.5		not-accessible	A list of protocol configuration entries for event notifications from this entity.
snmpEventNotifyEntry	1.3.6.1.6.3.2.1.2.5.1		not-accessible	A set of parameters that describe the type and destination of InformRequest-PDUs sent for a particular event. The snmpEventIndex in this entry's INDEX clause identifies the snmpEventEntry which, when triggered, will generate a notification as configured in this entry. The contextIdentity in this entry's INDEX clause identifies the context to which a notification will be sent.
I32 snmpEventNotifyIntervalRequested	1.3.6.1.6.3.2.1.2.5.1.1	Integer32	read-create	The requested interval for retransmission of Inform PDUs generated on the behalf of this entry. This variable will be the actual interval used unless the snmpEventNotifyMinInterval is greater than this object, in which case the interval shall be equal to snmpEventNotifyMinInterval.
I32 snmpEventNotifyRetransmissionsRequested	1.3.6.1.6.3.2.1.2.5.1.2	Integer32	read-create	The requested number of retransmissions of an InformRequest-PDU generated on behalf of this entry. This variable will be the actual number of retransmissions used unless the snmpEventNotifyMaxRetransmissions is less than this object, in which case the retransmission count shall be equal to snmpEventNotifyMaxRetransmissions.
I32 snmpEventNotifyLifetime	1.3.6.1.6.3.2.1.2.5.1.3	Integer32	read-create	The number of seconds this entry shall live until the corresponding instance of snmpEventNotifyStatus is set to 'destroy'. This value shall count down to zero, at which time the corresponding instance of snmpEventNotifyStatus will be set to 'destroy'. Any management station that is using this entry must periodically refresh this value to ensure the continued delivery of events.
ROW snmpEventNotifyStatus	1.3.6.1.6.3.2.1.2.5.1.4	RowStatus	read-create	The state of this snmpEventNotifyEntry. This object may not be set to `active' unless the following columnar objects exist in this row: snmpEventNotifyIntervalRequested, snmpEventNotifyRetransmissionsRequested, and snmpEventNotifyLifetime.
snmpM2MConformance	1.3.6.1.6.3.2.2
snmpM2MCompliances	1.3.6.1.6.3.2.2.1
snmpM2MCompliance	1.3.6.1.6.3.2.2.1.1			The compliance statement for SNMPv2 entities which implement the Manager-to-Manager MIB.
snmpM2MGroups	1.3.6.1.6.3.2.2.2
snmpAlarmGroup	1.3.6.1.6.3.2.2.2.1			A collection of objects allowing the description and configuration of threshold alarms from a SNMPv2 entity acting in a dual role.
snmpEventGroup	1.3.6.1.6.3.2.2.2.2			A collection of objects allowing the description and configuration of events from a SNMPv2 entity acting in a dual role.

RFC description

Machine-to-machine (M2M) management extensions for SNMPv2; defines objects for interagent communication and automated monitoring scenarios.

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